Diffraction grating with reduced polarization sensitivity

Details Diffraction grating with reduced polarization sensitivity Diffraction grating with reduced polarization sensitivity

1999-06-07

2000-08-01

Ullah, Akm E.

Optical waveguides

With optical coupler

Input/output coupler

359566, G02B 634

Patent

active

060978635

ABSTRACT:
A multiplexer/demultiplexer for routing different wavelength signals between a common pathway for conveying a plurality of the signals, and individual pathways for separately conveying the signals includes a reflective diffraction grating with reduced polarization sensitivity for dispersing the signals. The grating includes facets that are oriented for reducing efficiency variations within a transmission bandwidth and that are shaped for reducing differences between the diffraction efficiencies in two orthogonal directions of differentiation.

REFERENCES:
patent: 4111524 (1978-09-01), Tomlinson, III
patent: 4153330 (1979-05-01), Tomlinson, III
patent: 4385799 (1983-05-01), Soref
patent: 4571024 (1986-02-01), Husbands
patent: 4741588 (1988-05-01), Nicia et al.
patent: 5208701 (1993-05-01), Maeda
patent: 5581405 (1996-12-01), Meyers et al.
patent: 5589983 (1996-12-01), Meyers et al.
patent: 5638212 (1997-06-01), Meyers et al.

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