Integrated optical switches with very high extinction ratios

Details Integrated optical switches with very high extinction ratios Integrated optical switches with very high extinction ratios

1989-10-16

1991-03-12

Sikes, William L.

350 9613, G02B 610

Patent

active

049987917

ABSTRACT:
A 1.times.2 integrated optical switch is a monolithic integration of two high-extinction cascaded coupled-waveguide modulators, one of said modulators being a bar-type modulator to provide a straight-through path and the second being a cross-type to provide a cross-over path between input and outputs. The primary and secondary waveguides in each section of the cross-type and the bar-type modulators respectively serve to dissipate unwanted crosstalk. A 2.times.1 integrated optical switch is obtained by reversing the waveguide patterns. The addition of waveguide bends to ends of the secondary waveguides of each modulator results in a bidirectional 1.times.2/2.times.1 integrated optical switch.

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Lars Thylen, "Integrated Optics in LiNbO.sub.3 Recent Developments in Devices for Telecommunications", Journal of Lightwave Technology, Jun. 1988; pp. 847-861.
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Tadashi Saitoh and Takaai Mukai, "Recent Progress in Semiconductor Laser Amplifiers", Journal of Lightwave Technology, Nov. 1988; pp. 1656-1664.

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