Opto-electronic directional switch

Details Opto-electronic directional switch Opto-electronic directional switch

1987-03-10

1989-02-28

Sikes, William L.

Coherent light generators

Particular active media

Semiconductor

372 25, 372 29, 372 45, 372 50, 372 97, 372108, H01S 319, H01S 310

Patent

active

048092908

ABSTRACT:
An opto-electronic switch which shows a good signal rejection ratio between modes is also of particularly small dimensions. The switch comprises a semiconductor laser 1 having four contacts 12, 12', 13, 13' which provide gain guiding under two stripe windows 18, 19. By varying the bias currents supplied to the individual contacts 12, 12', 13, 13', or inputting optical control signals to the waveguiding channels under the stripe windows 18, 19, different configurations of optical output from the laser 1 can be achieved. The two contacts, 12, 12' and 13, 13', associated with each stripe window 18, 19 are effectively a signal stripe contact with a discontinuity. It is thought that diffractive transverse coupling at the discontinuity allows the use of a shorter device than in known directional switches. With feedback, the switch operates as a memory device. The switch finds particular application in optical communications, for instance in signal routing.

REFERENCES:
patent: 4210803 (1980-07-01), Ih
patent: 4219785 (1980-08-01), Scifres et al.

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