Non-selective photoreceiver for frequency-modulated optical sign

Details Non-selective photoreceiver for frequency-modulated optical sign Non-selective photoreceiver for frequency-modulated optical sign

1992-11-30

1994-05-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

372 18, 359152, H01J 4014

Patent

active

053130570

ABSTRACT:
A non-selective photoreceiver for frequency-modulated optical signals and optically using the receiver. The photoreceiver includes a laser operating under longitudinal multimode conditions, such as a FABRY-PEROT-type laser operating in a longitudinal multimode. The photoreceiver can function around any one of the longitudinal modes of the laser in overlapping frequency ranges, providing a wide overall band of operation. The plurality of modes reduces the selectively of the photoreceiver. The invention is also related to an optical link, which is either unidirectional using a photoreceiver as described above, or using two subassemblies each having a photoreceiver according to the invention, each photoreceiver being able to operate in an emission or a reception mode.

REFERENCES:
patent: 5220572 (1993-06-01), Kawaguchi
patent: 5222089 (1993-06-01), Huber
Laser Focus World, vol. 25, No. 8, pp. 129-133, Aug., 1989, T. P. Lee, "Diode-Laser Developers Look to Broadband Optical Communications".
Electronics Letters, vol. 25, No. 14, pp. 890-892, Jul. 6, 1989, T. L. Koch, et al., "Tunable Multiple-Quantum-Well Distributed-Bragg-Reflector Lasers as Tunable Narrowband Receivers".

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