Astable optical multi-vibrator

Details Astable optical multi-vibrator Astable optical multi-vibrator

1985-08-07

1986-08-12

Davie, James W.

Coherent light generators

Particular component circuitry

Optical pumping

331113R, 331144, 372 8, H01S 319

Patent

active

046060324

ABSTRACT:
Integrated laser diode devices are utilized as repeater elements and logic circuit elements in fiber optic and other light transfer systems. One embodiment discloses a six layer device (10) which is triggered not by an external electrical gating source, but by an external light source (8, 9) as from an optical fiber. Another embodiment operates a laser diode in a bilateral mode. That is, depending on the polarity of the applied voltage bias V to the device (50), two separate light pulses are emitted from different regions (56, 52) of the crystal. A further embodiment utilizes the semiconductor laser as a logical AND function. When the electrical bias (V) of the device (60) is set so that when at least two external light sources (67, 68) are applied, the device will emit laser light (69). Still another embodiment utilizes two semiconductor laser devices (911, 913) as an astable optical multivibrator (90).

REFERENCES:
patent: 4065729 (1977-12-01), Gover et al.
H. F. Lockwood et al., "The GaAs P-N-P-N Laser Diode", IEEE Journal of Quantum Electronics, vol. QE-10, No. 7, Jul. 1974, pp. 567-569.
D. D. Damljanovic, "Audio Frequency Multivibrator Uses Optocoupler", Electronic Engineering, Sep. 1975, pp. 25 and 27.
Anon., "Light Sensitive Astable Multivibrator", Elector (English) vol. 2, No. 7-8, pp. 710-711, Jul.-Aug. 1976.

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