Apparatus comprising a quantum well device

Details Apparatus comprising a quantum well device Apparatus comprising a quantum well device

1990-01-12

1992-03-24

Davie, James W.

Coherent light generators

Particular component circuitry

Optical pumping

372 8, 372 26, H01S 3096

Patent

active

050994891

ABSTRACT:
Disclosed is apparatus, exemplarily an electronic switching machine, that comprises novel and advantageous optical interconnection means. In particular, the apparatus comprises one or more digital electronic gates, and the output of the gate or gates is applied, without intervening amplifications, to a semiconductor laser whose radiation output is responsive to the applied electrical signal. The laser exemplarily is a quantum well laser of the type disclosed in U.S. patent application Ser. No. 407,608, U.S. Pat. No. 5,023,878, comprising at least one gain section and at least one loss section. The electrical output of the gate or gates is connected to the at least one loss section. Due to the ability of such lasers to be switched by means of a relatively very small current through the loss section, conventionally used drive amplifiers are not required in apparatus according to the invention, resulting in significantly reduced complexity and cost.

REFERENCES:
patent: 3727061 (1973-04-01), Dworkin
patent: 4689793 (1987-08-01), Liu et al.
Yanai et al., "Direct Modulation of a Double-Heterostructure Laser Using a Schottky-Barrier-Gate Gunn-Effect Digital Device", IEEE JQE, vol. QE-11, No. 7, Jul. 1975, pp. 519-524.
Kozlyayev et al., "The Use of Injection-Laser Logic-Elements in Optical Communications Systems with Time Multiplexing", Radio Engineering and Electronic Physics, vol. 15, No. 4 (1970), pp. 652-656.
Copeland, "Triggerable Semiconductor Lasers and Light-Coupled Logic", J. Appl. Phys. 51(4), Apr. 1980, pp. 1919-1921.

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