Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2005-12-06
2005-12-06
Le, Thien M. (Department: 2876)
Optical waveguides
With optical coupler
Particular coupling structure
C385S016000, C385S021000
Reexamination Certificate
active
06973238
ABSTRACT:
A directional coupler type optical modulator with traveling-wave electrodes includes a first directional coupler region, a waveguide wave coupling region, a second directional coupler region, and a set of noncrossing traveling-wave electrodes disposed along the outside of the waveguides. The electrodes of each directional coupler are connected to the traveling-wave electrodes via air-bridges. The waveguide structures are of the P-I-N type having a common N-type conducting layer which provides delta-beta operation of the directional coupler, and both cross and bar states are controlled by a single input signal.
REFERENCES:
patent: 4012113 (1977-03-01), Kogelnik et al.
patent: 4714311 (1987-12-01), Auracher
patent: 5850098 (1998-12-01), Butler et al.
patent: 5917980 (1999-06-01), Yoshimura et al.
patent: 5995691 (1999-11-01), Arai et al.
patent: 6064787 (2000-05-01), Castoldi
patent: 6091864 (2000-07-01), Hofmeister
patent: 6338975 (2002-01-01), Yoshimura et al.
patent: 6534725 (2003-03-01), Tsukahara
patent: 6778723 (2004-08-01), Yang
patent: 61 240227 (1986-10-01), None
Prof. F. Koyama et al., entitled “Frequency Chirping in External Modulators,”IEEE Journal of Lightwave Technology,vol. LT-6, No. 1, pp 87-93 Jan. 1988.
Dr. R. C. Alferness et al., entitled “High-Speed Traveling-Wave Directional Coupler Switch/Modulator for λ=1.32 μm,”IEEE Journal of Quantum Electronics,vol. QE-19, No. 9, pp 1339-1341, Sep. 1983.
Lucas b. Soldano et al., “Optical Multi-Mode Interference Devices Based on Self-Imaging: Principles and Applications,”Jouirnal of Lightwave Technology,vol. 13, No. 4, pp 615-627, Apr. 1995.
Dr. R.G. Waker et al., “Low-voltage, 50 ohm GaAs/AlGaAs Traveling-wave Modulator with bandwidth exceeding 25 GHz,” Electronics Letters, 9 vol. 25 No. 23 pp. 1549-1550, Nov. 1989.
Alferness et al. “High-speed Traveling-Wave Directional Coupler Switch/Modulator for λ=1.32 μm,” IEEE Journal of Quantum Electrionics USA, vol. QE-19, No. 9, Sep. 1983, pp. 1339-1341.
Komatsu et al., “4×4 GaAs/AlGaAs Optical Matrix Switches with Uniform Device Characteristics Using Alternating Δβ Electrooptic Guided-Wave Directional Couplers,”Journal of Lightwave Technology, IEEE, Jul. 9, 1991, No. 7, New York, pp. 871-878.
Walker et al., “Low-Voltage, 50Ω, GaAs/AlGaAs Travelling-Wave Modulator with Bandwidth Exceeding 25 GHz,” Electronics Letters , IEE Stevenage, GB, vol. 25, No. 23, Nov. 1989, pp. 1549-1550.
Nakagawa Shigeru
Soda Haruhisa
Fibest, Ltd.
Le Thien M.
Townsend and Townsend / and Crew LLP
LandOfFree
Optical switch and optical communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical switch and optical communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical switch and optical communication system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3470301