Optical receiver, optical semiconductor apparatus, and optical c

Details Optical receiver, optical semiconductor apparatus, and optical c Optical receiver, optical semiconductor apparatus, and optical c

1993-09-22

1995-12-26

Ullah, Akm E.

Optical waveguides

With optical coupler

Input/output coupler

372 94, 359180, G02B 600

Patent

active

054795443

ABSTRACT:
In optical communications, an optical receiver or semiconductor apparatus and an optical communication system using the semiconductor apparatus of the present invention solve the problem of polarization dependency. The optical receiver or optical semiconductor apparatus includes a pair of optical filters arranged such that tuned wavelengths for two different modes, e.g., tuned wavelengths for TE and TM modes, are set as light components having the same wavelength, and a beam splitting path for directing signal light to the pair of optical filters. Alternatively, the optical receiver or optical semiconductor apparatus includes a filter waveguide or waveguides capable of setting the tuned wavelength of one mode (e.g., TE) to be the same as the tuned wavelength of the other mode (e.g., TM) of two modes having different orders of transverse modes (e.g., two orthogonal modes), and an input waveguide. The input waveguide and filter waveguide are arranged to equally couple a signal light to those two modes.

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