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A 90° optical fiber hybrid for optimal signal power utilization

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Abstract

An optical 90° hybrid comprising a single-mode fiber coupler and a polarization beam splitter was made at 0.82 μm. It relies on the phase retardation intentionally induced in one of the input fiber leads of the coupler. By properly choosing the transmission/coupling coefficient as well as the orientation of the polarization beam splitter following the coupler, optimum distribution of the available optical fields can be obtained in a Costas loop.

© 1987 Optical Society of America

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