Optical waveguides – With optical coupler – Switch
Patent
1993-11-17
1995-05-23
Healy, Brian
Optical waveguides
With optical coupler
Switch
385 14, 385 15, 385 39, 385 40, 385130, 385131, 385132, 356345, G02B 642, G01B 902
Patent
active
054188687
ABSTRACT:
An optically switches relatively low power requirements and a relatively broad operating bandwidth. This switch includes a Mach-Zehnder interferometer (MZI) optically coupled at respective ends to an input coupler and an output coupler. One arm of the MZI includes a thermo-optic phase shifter. The output coupler is an adiabatic 3-dB coupler. In one embodiment, the input coupler is a Y-branch coupler having one input port. In a second embodiment, the input coupler is an adiabatic 3-dB coupler having two input ports.
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patent: 5293436 (1994-03-01), Diemeer
T. Kitoh et al., "Novel Broad-Band Optical Switch Using Silica-Based Planar Circuit," IEEE Photon. Technol. Lett. 4, pp. 735-737, Jul./(1992).
R. Adar et al., J. Lightwave Technol. Jan./(1992), pp. 46-50 "Adiabatic 3-dB Couplers, Filters, and Multiplexers Made with Silica Waveguides on Silicon."
C. H. Henry , et al., "Analysis of Mode Propagation in Optical Waveguide Devices by Fourier Expansion," IEEE J. Quantum Electron. 27 Mar./(1991), pp. 523-530.
A. Sugita et al., "Bridge-Suspended Silica-Waveguide Thermo-Optic Phase Shifter and Its Application to Mach-Zehnder Type Optical Switch," Trans. IEICE E73, Jan./(1990), pp. 105-108.
Cohen Leonard G.
Henry Charles H.
Kazarinov Rudolf F.
Wong Yiu-Huen
AT&T Corp.
Finston Martin I.
Healy Brian
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