Wavelength multiplexing of lasers

Details Wavelength multiplexing of lasers Wavelength multiplexing of lasers

1988-06-06

1990-06-05

Sikes, William L.

350 9615, 35016217, 35016223, G02B 634

Patent

active

049308556

ABSTRACT:
Apparatus for multiplexing or demultiplexing multiple laser beams of different wavelength. In multiplexing, the outputs from multiple diode lasers are combined in such a manner as to produce a practically parallel set of beams for direction onto a diffraction grating. The latter component deflects each beam from its normal path by an angular amount determined from the wavelength of the incident light. The angles of incidence of the multiple beams are chosen to provide angles of diffraction that are practically identical for all wavelengths under consideration. In demultiplexing, similar apparatus includes a diffraction grating to provide angular dispersion of the multiple wavelengths, at least one lens to magnify the angular differences, and a set of detectors positioned in the paths of the dispersed beams of different wavelengths.

REFERENCES:
patent: 3981562 (1976-09-01), Anthon
patent: 4262996 (1981-04-01), Yao
patent: 4435041 (1984-03-01), Torok et al.
patent: 4652080 (1987-03-01), Carter et al.
patent: 4741588 (1988-05-01), Nicia et al.
patent: 4819224 (1989-04-01), Laude

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