Basic module for an integrated optical phase difference measurement and correction system

A basic module for an integrated optical phase difference measurement and correction system was developed and fabricated in the AlGaAs-GaAs material system. The relative phase difference between two waveguides is measured using waveguide couplers to sample the optical field in each waveguide, a Y-ju...

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Bibliographic Details
Published in:IEEE photonics technology letters 1995-06, Vol.7 (6), p.649-651
Main Authors: Golubovic, B., Donnelly, J.P., Wang, C.A., Goodhue, W.D., Rediker, R.H.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Couplers
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integrated optics
Integrated optics. Optical fibers and wave guides
Optical and optoelectronic circuits
Optical interferometry
Optical materials
Optical modulation
Optical waveguides
Phase detection
Phase measurement
Phase modulation
Power measurement
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Summary:A basic module for an integrated optical phase difference measurement and correction system was developed and fabricated in the AlGaAs-GaAs material system. The relative phase difference between two waveguides is measured using waveguide couplers to sample the optical field in each waveguide, a Y-junction interferometer with a small sinusoidal phase dither applied to one arm and a vertically integrated metal-semiconductor-metal detector. P/sup +/-n/sup -/n/sup +/ phase modulators are used to control the phase difference between the waveguides. This implementation makes it possible to measure and correct the relative phase difference between adjacent waveguides using only a few percent of the optical power of each guide.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.388753