Mode scrambler as an optical isolator for higher-coherence laser

Details Mode scrambler as an optical isolator for higher-coherence laser Mode scrambler as an optical isolator for higher-coherence laser

1991-06-12

1992-08-11

Epps, Georgia Y.

Optical waveguides

With optical coupler

Particular coupling function

385 27, 385 29, 385 88, 372 6, G02B 628

Patent

active

051386755

ABSTRACT:
A fiber-optic communication system (10) employs a Fabry-Perot laser (14) that launches its output onto a single-mode pigtail (16) physically coupled to a mode scrambler (22), which is air coupled to a transmission medium consisting of multi-mode fiber-optic cable. Because the mode scrambler (22) divides the laser output power among many modes, the fraction of any reflected light that is coupled back into the cavity of the laser (14) can be made small enough to permit sufficient laser coherence for high-data-rate-transmission.

REFERENCES:
patent: 4229067 (1980-10-01), Love
patent: 4804248 (1989-02-01), Bhagavatula
patent: 4815806 (1989-03-01), Owen
patent: 4895421 (1990-01-01), Kim et al.
patent: 5028118 (1991-07-01), Facq et al.
patent: 5077814 (1991-12-01), Shigematsu et al.
Wilson, D. K., "Optical Isolators Adapt to Communication Needs," Laser Focus World, Apr. 1991.

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