Optical multiplexer/demultiplexer and wavelength division multip

Details Optical multiplexer/demultiplexer and wavelength division multip Optical multiplexer/demultiplexer and wavelength division multip

1997-02-14

1999-05-18

Lee, John D.

Optical waveguides

With optical coupler

Input/output coupler

385 72, 385 73, G02B6/32

Patent

active

059058277

ABSTRACT:
A wavelength division multiplexing module capable of multiplexing or demultiplexing a plurality of optical signals having close wavelengths with less crosstalk. The wavelength division multiplexing module includes a housing having a bottom wall, a first side wall, and a second side wall inclined a predetermined angle with respect to the first side wall, and a common port assembly fixed to the bottom wall of the housing so as to emit a collimated beam substantially perpendicular to the first side wall. One or more filter port assemblies are fixed to the first side wall in the condition that the pass wavelength characteristic and optical axis of each assembly have been adjusted. Similarly, one or more filter port assemblies are fixed to the second side wall in the condition that the pass wavelength characteristic and optical axis of each assembly have been adjusted. Each filter port assembly includes an optical film holder rotatable in a hole having a center axis inclined a predetermined angle .theta.1 with respect to the optical axis, and a band-pass filter mounted in the optical film holder so as to be inclined a predetermined angle .theta.2 with respect to a plane normal to the center axis of the hole of the optical film holder.

REFERENCES:
patent: 4244045 (1981-01-01), Nosu et al.
patent: 5416867 (1995-05-01), Thosten et al.
patent: 5583683 (1996-12-01), Scobey
patent: 5621573 (1997-04-01), Lewis et al.
patent: 5703992 (1997-12-01), Bergmann
patent: 5796887 (1998-08-01), Naganuma et al.
patent: 5801892 (1998-09-01), Naganuma et al.

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