Optical switch

Details Optical switch Optical switch

1982-04-01

1985-06-04

Davie, James W.

Coherent light generators

Particular component circuitry

Optical pumping

350 9614, 350 9615, 372 50, G02B 5174

Patent

active

045210691

ABSTRACT:
A semiconductor optical switch having a P-N junction with an active layer coupled with an input and output waveguides has been found. An input optical signal with the wavelength close to the center of the gain spectrum defined by said P-N junction is applied to said active layer, and said input optical signal is switched ON and OFF according to the injection current applied in said P-N junction. Said injection current for turning ON the optical switch is in the range between 80% and 90% of the threshold current which initiates oscillation operation of said P-N junction. When injection current is zero, an input optical signal does not appear at an output, and with the above injection current of 80-90% of the threshold current, an input optical signal appears at an output terminal. When a switch is in ON state, an input optical signal is amplified with some gain.

REFERENCES:
patent: 3952265 (1976-04-01), Hunsperger
patent: 4065729 (1977-12-01), Gover et al.
patent: 4316156 (1982-02-01), Scifres et al.
patent: 4327962 (1982-05-01), Redman
patent: 4376946 (1983-03-01), Kaminow et al.
Directional Coupler Switches, Modulators, and Filters Using Alternating Techniques, in IEEE Transactions on Circuits and Systems, vol. CAS-26, No. 12, Dec. 1979.

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