Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2005-04-19
2005-04-19
Kang, Juliana K. (Department: 2874)
Optical waveguides
With optical coupler
Plural
C385S018000, C385S025000, C385S031000, C385S047000
Reexamination Certificate
active
06882771
ABSTRACT:
In one aspect of the invention, a gain equalizer comprises a wavelength division demultiplexer operable to separate one or more communication bands into a plurality of wavelengths and an array of phase shifter stages. Each phase shifter stage comprises a micro-electro-optic system (MEMS) device comprising a moveable mirror layer operable to receive a first copy of an input signal from a beam splitter and to reflect the first copy of the input signal for combination with a second copy of the input signal at an output to form an output signal. The moveable mirror layer is displaceable in a substantially piston-like motion to introduce a phase shift between the first and second signal copies at the output, the amplitude of the output signal varying depending on the displacement of the moveable mirror layer. The gain equalizer further comprises a wavelength division multiplexer operable to receive a plurality of phase shifted wavelengths from the second beam splitter and to multiplex at least some of the phase shifted wavelengths into an optical output signal.
REFERENCES:
patent: 4011009 (1977-03-01), Lama et al.
patent: 4900119 (1990-02-01), Hill et al.
patent: 5023845 (1991-06-01), Crane et al.
patent: 5212743 (1993-05-01), Heismann
patent: 5311360 (1994-05-01), Bloom et al.
patent: 5459610 (1995-10-01), Bloom et al.
patent: 5500761 (1996-03-01), Goossen et al.
patent: 5654819 (1997-08-01), Goossen et al.
patent: 5659418 (1997-08-01), Yurke
patent: 5661592 (1997-08-01), Bornstein et al.
patent: 5701193 (1997-12-01), Vogel et al.
patent: 5745271 (1998-04-01), Ford et al.
patent: 5751469 (1998-05-01), Arney et al.
patent: 5825528 (1998-10-01), Goossen
patent: 5835255 (1998-11-01), Miles
patent: 5841579 (1998-11-01), Bloom et al.
patent: 5850492 (1998-12-01), Morasca et al.
patent: 5870221 (1999-02-01), Goossen
patent: 5914804 (1999-06-01), Goossen
patent: 5943155 (1999-08-01), Goossen
patent: 5943158 (1999-08-01), Ford et al.
patent: 5943454 (1999-08-01), Aksyuk et al.
patent: 5949571 (1999-09-01), Goossen et al.
patent: 5974207 (1999-10-01), Aksyuk et al.
patent: 5986796 (1999-11-01), Miles
patent: 6002513 (1999-12-01), Goossen et al.
patent: 6034812 (2000-03-01), Naito
patent: 6151160 (2000-11-01), Ma et al.
patent: 6188477 (2001-02-01), Pu et al.
patent: 6222954 (2001-04-01), Riza
patent: 6407851 (2002-06-01), Islam et al.
patent: 20020021485 (2002-02-01), Pilossof
K. E. Petersen, “Micromechanical Light Modulator Array Fabricated On Silicon,” Applied Physics Letters, vol. 31, No. 8, pp. 521-523, Oct. 15, 1977.
C. Marxer, et al., “Megahertz Opto-Mechanical Modulator,” Elsevier Science S.A., pp. 46-50, 1996.
C. M. Ragdale, et al., “Integrated Three Channel Laser and Optical Mulitplexer for Narrowband Wavelength Division Multiplexing,” Electronics Letters, vol. 30, No. 11, pp. 897-898, May 26, 1994.
K. O. Hill, et al., “Narrow-Bandwidth Optical Waveguide Transmission Filters,” Electronics Letters, vol. 23, No. 9, pp. 465-466, Apr. 23, 1987.
C. M. Ragdale, et al., “Integrated Laser and Add-Drop Optical Multiplexer for Narrowband Wavelength Division Multiplexing,” Electronic Letters, vol. 28, No. 89, pp. 712-714, Apr. 9, 1992.
K. Aratani, et al., “Process and Design Considerations for Surface Micromachined Beams for A Tuneable Interferometer Array in Silicon,” Handbook of Physics, pp. 230-235, 1993.
O. Solgaard, et al., “Deformable Grating Optical Modulator,” Optics Letters, vol. 17, No. 9, pp. 688-690, May 1, 1992.
W. R. Wiszniewski, et al., Mechanical Light Modulator Fabricated On A Silicon Chip Using Simox Technology, pp. 1027-1030, undated.
M.W. Chbat, “High-spectral-efficiency transmission systems,” OFC 2000, Baltimore, MD, pp TuJ1-1, 134-136, 2000.
J.W. Bayless, et al., “The Specification and Design of Bandlimited Digital Radio Systems,” IEEE Transactions on Communications, vol. COM-27 (12): pp. 1763-1770, 1979.
D.E. Sene, et al., “Polysilicon Micromechanical Gratings for Optical Modulation,” Elsevier vol. Sensors and Actiators (A 57), pp. 145-151, 1996.
D. M. Burns, et al., “Micro-Electro-Mechanical Variable Blaze Gratings,” IEEE 10th Annual International Workshop on Micro Mechanical Systems, pp. 385-391, 1997.
L. Y. Lin, et al., “Micromachined polarization-state controller and its application to polarization-mode dispersion compensation,” OFC 2000, Baltimore, MD, pp. ThQ3-1, 244-246, 2000.
J.W. Bayless, et al., “Highly Density Digital Data Transmission,” National Telecommunications Conference, Dallas, TX, pp. 1-6, 1976.
R.W. Corrigam et al., “17.3: Calibration of a Scanned Linear Grating Light ValueO Projection System,” www.siliconlight.com, 1999.
SLM “GLV Technology,” www.siliconlight.com, 1999.
R.W. Corrigam, et al., “Grating Light Valve Technology for Projection Displays,” Presented at the International Display Workshop, Kobe, Japan, 1998.
M. Ming, et al., “Principles and Applications of Optical Communications,” Irwin, pp. 468 & 470, 1996.
SLM “The Grating Light Valve Technology,” www.siliconlight.com, 1999.
SLM “The Scanned Grating Light Valve Display Architecture,” www.siliconlight.com, 1999.
A. Willner, “WDM Systems 1,” OFC '97, Dallas, TX, pp. TuJ, 43-45, 1997.
C. Pu, et al., “Michromachined Integrated Optical Polarization-State Rotator,” IEEE Photonics Technology Letters, vol. 12 (10), pp. 1358-1360, Oct. 2000.
D. T. Amm, et al., “5.2: Grating Light Valve□ Technology: Update and Novel Applications,” Presented at Society for Information Display Symposium, Anaheim, CA, pp. 1-4, May 1998.
D. M. Bloom, “The Grating Light Valve: revolutionizing display technology,” www.siliconlight.com, 1998.
D. T. Amm, et al., “Optical Performance of the Grating Light Valve Technology,” Presented at Photonics West-Electronic Imaging, Sunnyvale, CA, pp. 1-8, 1999.
J. E. Ford, et al., “Fiber-Coupled Variable Attenuator Using a MARS Modulator,” SPIE, vol. 3226, pp. 86-96, 1997.
D. M. Burns, et al., “Development of Michromechanical Variable Blaze Gratings,” Elsevier Science S.A., vol. Sensors and Actuators, pp. 7-15, 1998.
C. K. Madsen, et al., “A Tunable Dispersion Compensating MEMS All-Pass Filter,” IEEE Photonics Technology Letters, vol. 12 (6), pp. 651-653, 2000.
J. E. Ford, et al., “Passband-Free Dynamic WDM Equalization,” ECOC '98, Madrid, Spain, pp. 317-318, 1998.
K. W. Goossen, et al., Micromechanical Gain Slope Compensator for Spectrally Linear Optical Power Equalization, 2000.
K. W. Goossen, et al., “Silicon Modulator Based on Mechanically-Active Anti-Reflection Layer with 1 Mbit/sec Capability for Fiber-in-the-Loop Applications,” IEEE Photonics Technology Letters, vol. 6 (9), pp. 1119-1121, 1994.
L. Y. Lin, et al., “Angular-Precision Enhancement in Free-Space Micromachined Optical Switches,” IEEE Photonics Technology Letters, vol. 11 (10), pp. 1253-1255, 1999.
L. Y. Lin, et al., “Free-Space Micromachined Optical Switches with Submillisecond Switching Time for Large-Scale Optical Crossconnects,” IEEE Photonics Technology Letters, vol. 10 (4), pp. 525-527, 1998.
L. Y. Lin, et al., “Optical Crossconnects for High-capacity Lightwave Networks,” Jornal of High Speed Networks, pp. 17-34, 1999.
E. P. Furlani, et al., “Analysis of grating light valves with partial surface electrodes,” American Institute of Physics, vol. 83 (2), pp. 629-634, 1998.
E. P. Furlanl, et al., “Theory and simulation of viscous damped reflection phase gratings,” J. Phys. D: Appl. Phys., vol. 32, pp. 412-416, 1999.
K. Aratani, et al., “Surface micromachined tuneable interferometer array,” Sensors and Actuators, vol. 43, pp. 17-23, 1994.
R. T. Howe, et al., “Polycrystalline Silicon Micromechanical Beams,” Jour
Islam Mohammed N.
Kuditcher Amos
Baker & Botts L.L.P.
Cheetah Omni, LLC
Kang Juliana K.
LandOfFree
Apparatus and method for providing gain equalization does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for providing gain equalization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for providing gain equalization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3403052