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US 6,647,185 B2Granted
Optical interferometric modulator integrated with optical monitoring mechanism
AssigneeVitesse Semiconductor Corporation
InventorsRoger A. Hajjar, John M. Beley, Philip Chang
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Abstract
Techniques for optically sampling the output of a Mach-Zehnder electro-optic modulator without interfering the output optical signal.
Claims18
A device, comprising:
- a substrate;
- a Mach-Zehnder optical modulator formed on said substrate and having an input waveguide to receive an input optical signal and an output waveguide to output a guided output optical signal;
- and
- an optical detector positioned away from an edge of said substrate along a direction of said output waveguide to receive an optical signal that is not guided by said output waveguide and is complementary to said guided output optical signal.
1 more element
A method, comprising:
- placing an optical detector away from an output waveguide of a Mach-Zehnder modulator to receive unguided light that is complementary to a guided signal in said output waveguide;
- and
- processing a detector output from said optical detector representing said unguided light to obtain information contained in said guided signal, without directly intercepting said guided signal.
A device, comprising:
- a substrate;
- a Mach-Zehnder modulator formed in said substrate to receive an input optical signal to produce an output optical signal;
- an output fiber coupled to one edge of said substrate to receive said output optical signal;
- an optical detector, positioned above said output fiber and away from said edge of said substrate to receive an optical monitoring signal that is complementary to said output optical signal;
- and
- a device housing hermetically enclosing said substrate, said Mach-Zehnder modulator, at least a portion of said output fiber, and said optical detector.
3 more elements
Dependencies are inferred from the claim text.