3
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`PROVISIONAL APPLICATION FOR PATENT COVER SHEET
`This is a request for filing a PROVISIONAL APPLICATION FOR PATENT under 37 CFR 1.53(c).
`~1 n <; 0 b 2 "'::~-- l 'J.. J.f ?LC:.
`I Exoress Mail Label No.
`
`I
`
`.-\
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`0"1
`~..-~
`
`Given Name (first and middle [if any])
`
`Family Name or Surname
`
`Jeffrey P.
`
`Wilde
`
`Residence
`(City and either State or Foreign Country)
`Los Gatos, CA
`
`1'
`
`INVENTOR(S
`
`D Additional inventors are being named on the _ separately numbered sheets attached hereto
`
`TITLE OF THE INVENTION (280 characters max)
`Reconfigurable Optical Add-Drop Multiplexer with Dynamic Spectral Equalization Capability
`for DWDM Optical Networking Applications
`
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`Capella Photonics, Inc.
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`c/o Jeffrey P. Wilde
`19 Great Oaks Blvd., Suite 10
`I CA
`I ZIP 195119
`I State
`San Jose
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`I ( 408) 225-6248
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`Respectfully submitt
`
`SIGNATURE ~
`(!, {_.J;u_._
`
`TYPED or PRINTED I\IAME
`
`Jeffrey P. Wilde
`
`Date I 3/ 17 I 01 I
`
`REGISTRATION NO.
`(if appropriate)
`Docket Number:
`
`(408) 360-4243
`TELEPHONE
`USE ONLY FOR FILING A PROVISIONAL APPLICATION FOR PATENT
`This collection of information is required by 37 CFR 1.51. The information is used by the public to file (and by the PTO to process) a
`provisional application. Confidentiality is governed by 35 U.S.C. 122 and 37 CFR 1.14. This collection is estimated to take 8 hours to
`complete, including gathering, prepanng, and submitting the complete provisional application to the PTO. Time will vary depending upon
`the individual case. Any comments on the amount of time you require to complete this form and/or suggestions for reducing this burden,
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`20231. DO NOT SEND FEES OR COMPLETED FORMS TO THIS ADDRESS. SEND TO: Box Provisional Application, Assistant
`Commissioner for Patents, Washington, D.C. 20231.
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-1
`
`

`

`CAP-101/PROV
`
`PROVISIONAL PATENT APPLICATION OF
`
`JEFFREY P. WILDE
`
`for
`
`RECONFIGURABLE OPTICAL ADD-DROP MULTIPLEXER WITH
`DYNAMIC SPECTRAL EQUALIZER CAPABILITY FOR
`DWDM OPTICAL NETWORKING APPLICATIONS
`
`FIELD OF THE INVENTION
`
`This invention relates generally to optical communication hardware, and more
`specifically to hardware designed for use in dense wavelength division multiplexed
`(DWDM) systems. The invention describes a new device design for providing two
`important functions of importance in emerging DWDM systems: (1) reconfigurable add(cid:173)
`drop of individual wavelength channels, and (2) spectral equalization of wavelength
`channels.
`
`SUMMARY & DETAILED DESCRIPTION
`
`The more detailed disclosure of the present invention is contained in the following
`description and figures, as supplied by the attached appendices.
`
`Appendix A: Design Concept for DWDM Multi-Channel Dynamic Add/Drop Module,
`by J. P. Wilde, 7/28/00
`Appendix B: Modified Dynamic OADM Design, by J. P. Wilde, 11/28/00
`Appendix C: Reconfigurable OADM with Dynamic Equalization, by J.P. Wilde,
`12/28/00
`Appendix D: Technical Specifications 1/9/2001, Dynamic Optical Add/Drop Multiplexer
`
`Overview and Objective
`
`Emerging DWDM communication systems are in need of a robust and low-cost device
`technology for providing dynamic optical add-drop of wavelength channels at node sites
`as shown in Figures 1 and 2. Such a device -- referred to as an optical add-drop
`multiplexer (OADM) -- should by remotely reconfigurable through software control. It is
`desirable to have complete control at the granularity of a single wavelength, meaning any
`individual wavelength channel can be added/dropped by the device.
`
`Long-haul and ultra-long-haul applications require the OADM to support a large channel
`count (80 channels today, heading to 160 channels or more in the future). Therefore, a
`technology that is intrinsically scalable to such channel counts is needed. Moreover, it is
`important that the optical loss introduced by the device be independent (or only weakly
`dependent) on the number of channels. The device should also have low polarization
`
`1
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-2
`
`

`

`CAP-101/PROV
`
`dependent loss (PDL) and low polarization mode dispersion (PMD). A general set of
`device specifications is outlined in Appendix D.
`
`Figures 3 and 4 illustrate two basic approaches, parallel and serial, to constructing a
`dynamic OADM. The parallel architecture is intrinsically scalable to large channel
`counts, and is the general approach taken in this invention. The serial scheme has various
`limitations as noted in Figure 4.
`
`A parallel architecture based on free-space optics has been previously described in Ref. 1.
`A block diagram of this device is shown in Figure 5. It has four fiber ports: (1) input, (2)
`pass-through, (3) add, and ( 4) drop. One circulator is used to combine the input and pass(cid:173)
`through ports onto one fiber, and another circulator combines the add and drop ports to a
`second fiber. Figure 6 shows a graphic of the optical system configuration of the OADM
`device described in Ref. 1. Two coupling lenses are implemented to convert the light
`paths from these two fibers to free space. Wavelength separation and routing are done in
`free space. The device utilizes a ruled diffraction grating to separate the input light into
`its constituent channels. A binary micromachined mirror array redirects each of the
`individual channels to one of two outputs. Each mirror in the linear array either
`retroreflects its corresponding channel back along the original input path towards the
`pass-through port, or it reflects its channel to the drop port.
`
`,
`
`While this architecture is attractive in the sense that it is compact and scalable to high
`channel count, it also has a number oflimitations. First, the design requires precise
`alignment of components that makes assembly during fabrication complex and
`expensive. Second, no provisions are provided for maintaining the relative alignment of
`the optical components so that the system performance may degrade over time, or in the
`presence of shock and vibrations, or due to a temperature change. Third, it requires all
`the add and drop wavelengths to enter and leave the device on single fibers. In other
`words, additional means must be provided to multiplex the add channels onto a single
`fiber and to demultiplex the drop channels from the single fiber output from the device.
`This additional mux/demux requirement can lead to significant additional expense.
`
`What is needed is an improved free-space architecture that overcomes these limitations.
`
`Description of the Invention
`
`The OADM device architecture disclosed here has all the positive attributes of a compact,
`parallel design, and also overcomes existing limitations by providing (1) a more versatile
`architecture with multiple physical add and drop ports, (2) analog mirrors under servo
`control that loosen fabrication tolerances and provide self-alignment to correct for
`component drift during operation, (3) additional optics to provide the servo feedback
`signal, and (4) a servo system scheme that provides for dynamic spectral equalization on
`a channel-by-channel basis.
`
`2
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-3
`
`

`

`CAP-101/PROV
`
`OADM Architectures
`
`Three different OADM architectures disclosed in the present invention are shown in
`Figures 7-9. All of these architectures provide for dynamic drop of one or more
`wavelength channels on any one of multiple drop ports. The "wavelength separation and
`routing" (WSR) function is common to all three architectures and is performed using
`free-space optics and silicon micromirrors. The optical loss of the WSR unit can be fairly
`low, its value being determined by the diffraction efficiency of a grating or similar
`dispersive device used for wavelength separation. A typical value is in the range from 2 -
`4 dB. For the preferred case in which only one wavelength is dropped on each drop port,
`then no additional wavelength demultiplexing is required before the signals carried by the
`respective channels are received by photodetectors. The three approaches of Figs. 7-9
`differ primarily in the way in which the add function is implemented.
`
`The first of these (Fig. 7) is designed for one-way optical propagation. It uses a combiner
`(or JxN coupler; e.g., the lx16 broadband coupler sold by Newport Corp., Irvine, CA,
`product model number F-CPL-B16350) for injecting the add channels into the pass(cid:173)
`through port. While use of a combiner is straightforward, the associated optical loss can
`be large (e.g., the lx16 Newport coupler may have up to 14.5 dB ofloss). For those
`situations where the loss can be tolerated, this is suitable approach.
`
`The second architecture (Fig. 8) is designed for bi-directional operation and has better
`loss performance compared to the first embodiment. Two WSR units are utilized, with
`one unit providing dynamic drop and the other dynamic add. This architecture is very
`general, with no fundamental restrictions on the wavelengths that can be added or
`dropped (other than those restrictions imposed by the overall communication system).
`
`The third architecture (Fig. 9) is also bi-directional, but uses only one WSR unit.
`Circulators are situated on all of the physical input/output ports, allowing for two-way
`optical propagation. This design has the restriction that at each of the add/drop ports, the
`add and drop wavelengths must be the same.
`
`Free-Space Optical Embodiments
`
`One embodiment of the present invention is shown in Figure 10. The input/output
`consists of a linear array of fiber collimators. Such collimators are well known in the art
`and are comprised of a collimating lens and ferrule-mounted fiber packaged together in a
`mechanically rigid stainless steel or glass tube (e.g., see collimators made by ADC
`Photonics, Inc., Minneapolis, MN, www.adc.com). The collimators can be positioned in
`a linear array by, for example, means of a V -groove array made out of any of a variety of
`materials including silicon, plastic, or ceramic. The top collimator is designated the
`input, the second collimator is designated the pass-through, and the remaining collimators
`are designated as drop ports.
`
`Multi-wavelength light from the input collimator is directed to a ruled diffraction grating.
`The grating separates the different wavelength channels into different diffraction angles.
`
`3
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-4
`
`

`

`CAP-101/PROV
`
`In the preferred embodiment, -1 order diffraction is assumed. A focusing lens receives
`the diffracted light and focuses it onto a linear micromirror array positioned in the back
`focal plane. The lens has the property that it brings the different wavelength channels to
`focus at separate spatial locations such that each channel is associated with a unique
`focused spot. Each wavelength channel is associated with a single mirror in the
`micromirror array. Figure 10 illustrates only three wavelengths for simplicity. Figure 11
`shows a close-up view of the micromirror array, with each of the three wavelengths
`falling on its respective mirror.
`
`Each of the mirrors in the micromirror array reflects its associated wavelength channel
`back through the focusing lens, to the grating, and back towards one of output ports. This
`requires the micromirrors to be dynamically adjustable with at least one axis of rotation.
`The rotational motion should be under analog control, so that the angles can be
`continuous adjusted to scan across all possible output collimator ports. Various types of
`micromachined mirrors and deflectors exist in the art. One prior art implementation is
`shown here in Figure 12. This is an array of reflective ribbons, the position of each
`ribbon being under electrostatic control (made by Silicon Light Machines, Inc.,
`Sunnyvale, CA). An adaptation of such a ribbon array can be used in the present
`invention to provide the micromirror function, with each ribbon in the array acting as a
`separately controllable mirror.
`
`In the preferred embodiment, the grating is placed in the front focal plane of the focusing
`lens, thereby producing a telecentric optical system. A telecentric system has the
`property that the chief rays of the focused beams are all parallel to each other and
`generally parallel to the optical axis. In this application, the telecentric design allows the
`reflected beams to efficiently couple back into the output collimators, with little
`translational walk-off error (perpendicular to the vertical collimator array plane). A
`quarter wave plate is placed in front of the focusing lens to provide the desired
`polarization properties as discussed in Ref. 1 (namely minimal PDL and PMD).
`
`By controlling independently the angle of each micromirror, the system has the ability to
`direct each wavelength channel to any of the outputs (pass-through or drop). The
`presence of multiple drops ports allows for the possibility of putting only one wavelength
`on one drop port, thereby avoiding the additional demultiplexing (and the associated cost
`and complexity) that would otherwise be required with the prior art device of Figures 5
`and 6. Feedback control of the mirror positions makes the system stable. More detail
`regarding the control system is provided in the following sections. This system can
`readily scale to large channel count by simply adding more mirrors to the mirror array.
`
`The results of an optical ray trace model are shown in Figures 13-15. The collimated
`beam diameter is approximately 1 mm. The angle of incidence on the grating is 85
`degrees, and the grating spatial frequency is 700 lines/mm. The grating is blazed to
`optimize the -1 order diffraction efficiency. An f=30 mm ideal focusing lens captures
`the diffracted light and focuses it to the micromirror plane (denoted as the spatial light
`modulator (SLM) plane in Figures 13-15). In this model, the grating is not placed in the
`front focal plane of the focusing lens, so this configuration does not represent the
`
`4
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-5
`
`

`

`CAP-101/PROV
`
`preferred telecentric embodiment. However, this non-telecentric system is useful for
`illustrating some of the spatial scales of a typical embodiment. For example, wavelength
`channels separated by 100 GHz (0.8 nm) are focused in the SLM plane with a 17-micron
`pitch. The shape and size of a focused wavelength channel, along with the relative
`spacing between two adjacent channels, is shown in Figure 15. It is seen that adjacent
`channels are separate and resolvable. The side view of Figure 14 shows that mirror
`deflection of approximately 1.15 degrees is needed to direct a beam between adjacent
`output collimator ports, with the ports lying on a 1.2 mm pitch.
`
`Additional Actuation for more Robust Servo Control
`
`The action of the mirrors in the micromirror array serves to translate the various
`wavelength beams to their respective output collimator ports. However, to provide more
`control over the coupling efficiency back into a collimator, additional degrees of freedom
`are needed. In particular, it is advantageous to have control over the two incoming angles
`(8x and 8y) into the collimator. One method for achieving such control is illustrated in
`Figure 16. Here a collimated beam reflects off of a dynamic mirror capable of rotation
`about two orthogonal axes. A 4-ftelecentric optical system images the mirror onto the
`front focal plane of a coupling lens, in this case the entrance surface of a quarter-pitch
`GRIN lens.
`
`The sensitivity to change in the mirror angle depends on the focal length of the coupling
`lens. For the GRIN lens used in Figure 16, the coupling efficiency versus mirror
`deflection plot shows that a change of a few tenths of one degree is sufficient to go from
`optimum coupling to near zero. The 2-axis dynamic mirror can take the form of a
`double-gimbaled torsional mirror. A single-axis torsional mirror is described in Ref. 2,
`while a two-axis version of such a torsional mirror is described in Ref. 3, and a version
`developed by Lucent Technologies is shown in Figure 17.
`
`Accordingly, additional embodiments of the present invention are shown in Figures 18
`and 19. In Fig. 18 a 1xN dynamic mirror array is added, along with two 1xN lens arrays
`to comprise a telecentric system capable of controlling the angle of the return beams into
`all of the output collimators. Moreover, the top dynamic mirror in the 1xN array allows
`the angle of incidence of the input beam onto the grating to be controlled. In this way the
`spot array can be actively aligned to the micromirror array in the back focal plane of the
`focusing lens. Extending the input/output plane to two dimensions as shown in Figure 19
`can increase the number of output collimator ports. In this case each mirror in the
`micromirror array must be capable of providing two axes of deflection. Additionally, a
`2-D dynamic mirror array, along with two 2-D lens arrays for telecentric imaging,
`provides control of the angular input into the collimators.
`
`Dynamic Spectral Equalization
`
`The use of micromirrors with analog deflection allows the coupling efficiency to be
`controlled on a channel-by-channel basis. This important property of the present
`invention allows for dynamic spectral equalization. Such equalization is important to
`
`5
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-6
`
`

`

`CAP-101/PROV
`
`compensate for non-uniform gain associated with optical amplifiers in the optical
`networking system (e.g., erbium-doped fiber amplifiers). The principle of the present
`invention that allows for spectral equalization is detailed in Figures 20 and 21. The
`model results in these figures derive from an extension of the ray trace model of the
`system shown in Figs. 13-14. In Figure 20 it is seen that a 0.3-degree change in
`micromirror angle produces significant translational walk-off of a representative
`collimated beam (representing one wavelength channel in the system). However, the 0.3-
`degree deflection is only a fraction of the 1.15 degrees it takes to move the beam to an
`adjacent output port. The change in coupling efficiency with micromirror angle is shown
`in Figure 21. Under servo control, each wavelength in the system can be coupled with
`any efficiency value by making a suitable adjustment in the associated micromirror
`deflection angle in accordance with Figure 21. In this way the device of the present
`invention provides variable optical attenuation at the granularity of a single wavelength.
`
`Servo Control System
`
`To facilitate feedback control ofthe dynamic mirrors (in the micromirror array and in the
`2-axis mirror array for improved collimator coupling), a suitable feedback signal is
`required. Figure 22 illustrates the manner in which the present invention provides the
`requisite signals. Because the pass-through port contains multiple wavelengths, a portion
`of the outgoing light from this collimator is tapped off and sent to a spectral monitor.
`The spectral monitor can comprise a grating and linear photodiode array for example.
`Such spectral monitors are commercially available. The output from the spectral monitor
`provides a measure of the intensity of each wavelength channel in this port. If the drop
`ports only contain a single wavelength, then simple power monitoring of each drop port
`is sufficient. These signals are provided to a servo system that controls the driving
`voltages to each of the mirrors in the system. The mirrors are actuated in such a way as
`to achieve whatever coupling conditions are desired on a channel-by-channel basis. For
`example, spectral equalization would require equal intensity set points of all pass-through
`channels.
`
`'"
`
`It is understood that the specific device design described here is only representative of the
`general device architecture, and that other similar designs may be implemented to
`achieve substantially the same results.
`
`References
`
`1. J. Ford et at., Journal of Lightwave Technology 17, pp. 904-911 (1999).
`2. K. E. Petersen, Proc. IEEE 70, pp. 420-457 (1982).
`3. A. P. Neukermans and T. G. Slater, US Patent 5,629,790 (1997).
`
`6
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-7
`
`

`

`m
`
`Dynamic OADMs
`
`A A
`
`A
`A
`
`A
`A
`
`• Dynamic network
`reconfiguration under
`software control
`
`• Allows any A. to be
`added or dropped
`at any node
`
`A A
`
`Figure 1
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-8
`
`

`

`Ill
`
`Telecom Market Segments
`
`Long Haul
`
`Metro
`
`Metro
`
`Access
`
`Access
`
`Figure 2
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-9
`
`

`

`m
`
`Dynamic Add/Drop Architectures
`
`Parallel Architecture
`
`Serial Architecture
`
`Demux
`
`Mux
`
`Filters
`
`Demux
`
`....
`
`Mux
`
`Drop
`
`Add
`
`Drop
`
`Add
`
`Figure 3
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-10
`
`

`

`m
`
`Parallel vs Serial Architectures
`
`• Parallel
`- Requires demux of all channels.
`- Scalable for high channel count.
`• Serial
`-
`In use today for fixed, low-channel-count systems.
`- Significant losses may accumulate (scales as number of drop
`channels).
`- Through-channel disruption occurs during reconfiguration.
`- Requires demux of all channels on drop port (even though only a
`small portion of channels exist on drop fiber ~ significant
`additional costs).
`
`Figure 4
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-11
`
`

`

`Existing Add/Drop Architecture
`
`ill
`
`• Utilizes the power of free-space optics to provide parallel manipulation
`of individual wavelengths in a compact architecture.
`• 4-fiber device: Input, Pass-Through, Add, & Drop.
`• Add & Drop fibers contain multiple wavelengths.
`• Limitation: Add/Drop wavelengths must be multiplexed/demultiplexed
`-7 Significant additional cost.
`
`Input
`
`At, A2, A3, ... ~
`
`1 •
`
`• ~ Wave length Separation & Routing
`
`Pass-Through
`Al, A2, A3, ... AN
`
`Add
`Ai, Aj, ~
`
`Drop
`Ai, Aj, Ak
`
`Figure 5
`
`·
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-12
`
`

`

`fif
`
`Dynamic OADM Architecture (Prior Art)
`
`ADD
`
`Collimation
`Lenses
`
`DROP
`
`Focus lens
`
`IN
`
`PASS
`
`Device Plane
`
`Ref: J. Ford et al., JLT 17, pp. 904-911 (1999)
`
`Figure 6
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-13
`
`

`

`Capella OADM Approach (using Combiner)
`
`• Multiple Drop Ports
`- Provide physically distinct Drop ports
`- Benefit: Eliminates the need to mux/demux add/drop ports
`• Servo Control
`- Provides for dynamic equalization
`- Minimize loss through optimum alignment
`- Low-cost assembly
`
`Input Fiber
`Al, A2, A3, ... ~
`=
`Pass-Through
`
`Add
`Ai, Aj, Ak ' AI
`
`~ 1 Combiner
`
`Output Fiber
`A.l, A-2, A-3, ... ~
`
`Port 1
`Drop
`A,.
`1
`
`Port2
`Drop
`A· J
`
`Port3
`Drop
`~
`
`Port4
`Drop
`"--
`
`Figure 7
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-14
`
`

`

`Bi-Directional Dynamic OADM (Reciprocal Scheme)
`
`IIi
`
`Input/Output Fiber
`"-t, A-2, A-3, ... ~
`
`Intermediate
`Pass-Through
`
`Port 1
`Drop
`A,.
`l
`
`Port2
`Drop
`A,.
`J
`
`Port3
`Drop
`A.k
`
`Port4
`Drop
`~
`
`Input/Output Fiber ..
`"-t, Az, A-3, •.. ~
`
`Port 1
`Add
`A· l
`
`Port 2
`Add
`A· J
`
`Port3
`Add
`A.k
`
`Port4
`Add
`At
`
`Figure 8
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-15
`
`

`

`Bi-Directional OADM Approach (Circulator Scheme)
`
`1-if
`
`Input
`
`... .....
`Al, A2, A3, ... AN
`
`Pass-Through
`At, A2, A-3, ... ~
`
`Port 1
`A_.
`1
`
`Port2
`A· J
`
`Port 3
`Ak
`
`Port4
`"-t
`
`Add
`
`t
`
`Drop
`
`Add ~
`Drop
`
`Add t
`
`Drop
`
`~
`Add
`
`Drop
`
`Figure 9
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-16
`
`

`

`m
`
`Capella Photonics OADM Design
`(3-Wavelength System Illustration)
`
`Legend
`Orange = 1527 nm
`Red= 1545 nm
`Green= 1563 nm
`
`Diffraction Grating
`
`Input Fiber
`Collimator
`
`Pass-Through
`Fiber Collimator
`
`Focusing Lens
`& Quarter Wave Plate
`
`Drop Fiber
`Collimators
`
`Micromirror
`Array
`
`Figure 10
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-17
`
`

`

`Micromirror Array
`
`Micromirror array provides channel-by-channel
`wavelength routing and dynamic gain equalization.
`
`Figure 11
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-18
`
`

`

`Silicon Light Machines MEMS Ribbon
`Deflector Array
`
`Nloving Ribbon
`
`Fixed Ribbon
`
`Up: Refledi.oD
`RibboDm held 1.1p
`by tensile mess
`
`DGWIC Dil"fradien
`Ribbons pulled down
`el ectrostan c ally
`
`~.......--· Air Gap
`_....._...-- Silicon Substrate
`
`Aluminum .500A
`-
`--·Nitride lOOOA
`Cn=:J Air 1300A
`--11 Tungsten lOOOA
`r~:-::~~J Oxide ;oooA
`• • • Silicon
`
`Figure 12
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-19
`
`

`

`Capella Photonics OADM Design
`
`Ill
`
`Output
`( ........ ~~·~···~~~~~~~~··················· ..................................................................... )
`
`SLM
`
`I
`
`J
`;
`1
`
`•
`
`I
`!vi
`•
`Wavelength I
`• •
`lvj
`Combtner 1
`lvn
`•
`\ ......................................................................................... +. ............................................................... /
`Top View
`
`•
`
`i
`
`Input
`
`Pass-Through
`
`tJ.A. = 0.8 nm
`(100 GHz)
`
`Focusing Lens
`(f= 30 mm)
`
`Grating
`(700 lines/mm)
`
`Pass-Through &
`Multiple Drop Ports
`(in vertical dimension)
`Figure 13
`
`Note: QWP not shown
`& c fi
`c
`.
`11 P
`.
`ape a ropnetary
`on tdentlal
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-20
`
`

`

`Modified Dynamic OADM Design
`
`• Use analog micromachined mirrors to steer individual wavelengths to the
`appropriate Drop ports.
`• Servo control mirrors to ensure maximum coupling efficiency.
`
`Grating
`(700 lines/mm)
`
`Input
`
`Pass-Through
`
`Side View
`
`Drop Ports
`(1.2 mm pitch)
`
`Focusing Lens
`(f= 30 mm)
`
`SLM
`( 1.15 de g./port)
`
`Figure 14
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-21
`
`

`

`m
`
`Focused Spot Intensity Distribution at SLM Plane
`for 100 GHz Channel Spacing (~A= 0.8 nm)
`
`0. Ll933
`
`0.LILI~Id
`
`0.39~6
`
`0.3LI53
`
`ILI.2'?6~
`
`0.2'"167
`
`0, L '??:3
`
`0. LLI9~
`
`0.01:397
`
`m.iZILI9::3
`
`0.000Q
`
`POLYCHROMATIC HUVGENS POINT SPREAD FUNCTION
`EXTB!NAL [:FfJITY LASER lllOilE
`SAT ii'UN 2'1 2J.QQ
`L.691G TO L.EiiGEI MI~S RT ti.0313G. ti.~l3 DEC.
`ItRJ: SIZE IS l27. ~~ MICRilNS SQ.JARE.
`STREHL RRTDJ: O.LI93
`
`I DES INGER : J" p w
`
`LOS G Fl TOS.. C Fl
`
`CONFICURATION 1 OF 1
`
`Figure 15
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-22
`
`

`

`lfi
`
`4-fTelecentric Imaging System for
`Servo-Based Collimator Coupling
`
`2-Axis
`
`~amic
`Mtrror ~ /
`
`~;
`
`Plano-Convex Imaging Lenses
`
`/
`fl
`
`\
`
`n
`
`f
`
`2f
`
`f
`
`Output Fiber
`
`j
`
`c==J
`
`Coupling Lens
`
`10,-----------------------~-----------------------,
`
`08
`
`~ c
`·~ 06
`in
`.~ g. 04
`
`0
`()
`
`02
`
`00+-~--~~~~~~--~~~~~~~~~----~~~
`44.7
`44.8
`44.9
`45 0
`451
`45.2
`45.3
`
`Mirror Angle (deg)
`
`Figure 16
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-23
`
`

`

`
`
`Hmumowuaoo”My@833on£396
`E2:5
`
`23%».£3E
`
`Petitioner Ciena Corp. et al.
`Exhi it 1008-24
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-24
`
`

`

`m
`
`OADM Architecture with 2-Axis lxN Mirror Array
`Actuation+ Telecentric Imaging Lens Arrays
`
`Diffraction Grating
`
`lx6 2-Axis
`Mirror Array
`~
`
`Imaging Lens
`Arrays
`
`/J
`
`Input Fiber
`,.-- Collimator
`
`Pass-Through
`Fiber Collimator
`
`Legend
`Orange= 1527 nm
`Red= 1545 nm
`Green= 1563 nm
`
`Focusing Lens &
`Quarter Wave Plate
`
`Micromirror
`Array
`
`4 Drop Fiber
`Collimators
`
`Figure 18
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-25
`
`

`

`Hl
`
`2-D Input/Output Collimator Array for
`Increased Port Count
`
`Diffraction
`Grating
`
`3x3 2-Axis
`Mirror Array
`
`Focusing Lens &
`Quarter Wave Plate
`
`Imaging Lens
`......--- Arrays
`I
`
`Pass-Through
`Fiber Collimator
`
`Input Fiber
`Collimator
`
`7 Drop Fiber
`Collimators
`
`Micro mirror
`Array (2-Axis)
`
`Figure 19
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-26
`
`

`

`'"
`
`Change in Coupling with Mirror Position
`
`Fiber
`~
`
`l:·:·:·:·:·:::::::::·:·:::::·:·:·:·:·:.:·:·:·:·:·:::::::.:·:·:::::.:·:·:·:l
`r;;:;.;.;.;:;.;.;.;.;.;.:;::::·:;.;.;:;::.:·:·:·:·:·:-··:·:·:·:.:::::::.:·1
`
`On-Axis Coupling
`(Mirror Angle = 0 deg)
`
`Individual Wave length Beam
`
`\
`~~
`~~ I
`\
`
`GRIN Lens (1.0 mm diameter)
`
`1:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::!
`
`--.::::::::::::----=:::
`
`Off-Axis Coupling
`(Mirror Angle = 0.3 deg)
`
`Figure 20
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-27
`
`

`

`m
`
`"
`
`Change in Coupling with Mirror Angle
`
`Grazing Incidence OADM, Focusing Lens fl = 30 mm
`(SLW 1.0 mm GRIN Lens, 0.25 pitch)
`1.0 1:::-------------------~
`
`0.8
`
`Q)
`
`0.6
`
`~ c::
`'(J u=
`UJ
`en
`.s
`g- 0.4
`0
`(.)
`
`0.2
`
`0.0+-------~------~------~------~-===~=r------~
`0.25
`0.00
`0.05
`0.15
`0.30
`0.10
`0.20
`
`Micro Mirror Angle (deg)
`
`Figure 21
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-28
`
`

`

`m
`
`~
`
`,>
`
`Servo Block Diagram
`(for configuration & equalization control)
`
`Input Fiber
`
`AI, A2, A-3, ••• ~
`
`Pass Through
`
`AI, A2, A3, ... ~
`
`Spectral Monitor
`
`Drop
`Ports
`
`Drop Port
`Intensity
`Monitoring
`
`Channel Intensities
`
`Control Voltage Outputs
`
`Servo Control Circuitry
`
`Figure 22
`
`Capella Proprietary & Confidential
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-29
`
`

`

`CAP-101/PROV
`
`Appendix A
`
`Design Concept for DWDM Multi-Channel Dynamic Add/Drop Module, dated 7/28/00
`
`7
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-30
`
`

`

`m
`
`Design Concept for DWDM Multi-Channel
`Dynamic Add/Drop Module
`
`.A-1
`A-2
`
`A.N
`
`Coupler
`r l
`
`..
`: .. I ~~
`•
`
`Add Channels
`
`Blazed
`~
`Grating
`~ --\--tl
`
`Inverse Fourier
`Transform Lens
`
`~
`
`OUTPUT
`
`Coupler
`
`\
`Transmitted
`Pass Channels
`
`Reflected
`Drop Channels
`
`\
`
`hNSLMfor
`Spectral Filtering
`
`Circulator
`
`INPUT
`
`,...
`
`Drop
`Channels
`
`Fourier Transform Lens
`
`Blazed
`Grating
`
`Inventor: Jeffreyl Wilde
`/J _J#_ ~ f
`.U
`-z { 2St a 0
`l../'{7(') ,
`
`Witness: ~~~~12
`~ ¢1/"
`
`'CAf7{!l:J
`
`•
`
`Date: 7/28/00
`
`Petitioner Ciena Corp. et al.
`Exhibit 1008-31
`
`

`

`Focused Spot Intensity Distribution at SLM Plane
`for 100 GHz Channel Spacing (~A,= 0.8 nm)
`
`iii
`
`-S)
`
`I
`
`{ ·~ <
`I (
`[
`; ~ ~
`
`!
`. ~·
`~ ~,.~
`
`II
`
`.
`
`0. 'i933
`
`0.'i'i'IIJ
`
`0.39'16
`
`0.3'i63
`
`0.Z96Q
`
`0.2'"167
`
`0. L 973
`
`0, l LfBia
`
`0.01i!S7
`
`0.12'1Lf93
`
`0.01'!)0(;1
`
`POLYCHROMATIC HUYGENS POINT SPREAD FUNCTION
`EXT'BlNAL CRJITY LASER DIODE
`SAT ii'UN 2'1 20113
`L.Q;GG TD l.9iG9 HILmo!S RT e.OOGG. e.0Z.:Jt3 DEC.
`It'RE SlZE IS 127. ilil MICRONS SQ.IARE,
`STREHL RATDJ: O.'i93
`
`I 0 ES INGER I
`
`;r p w
`LOS GATOS.. C A
`
`CONFICURATION 1 OF 1
`
`Inventor: Jeffrey P. Wilde
`/l~~ ~ (~
`L.f{f J
`1{l8'{l1