Opto-electronic directional switch

Details Opto-electronic directional switch Opto-electronic directional switch

H - Electricity

01

S

345/56

H01S 3/101 (2006.01) G02F 1/015 (2006.01) G02F 1/29 (2006.01) G02F 1/313 (2006.01) H01S 5/062 (2006.01)

Patent

CA 1284836

ABSTRACT OPTO-ELECTRONIC DIRECTIONAL SWITCH 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 by 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 single 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.

531528

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