Incoherent composite multi-emitter laser for an optical arrangem

Details Incoherent composite multi-emitter laser for an optical arrangem Incoherent composite multi-emitter laser for an optical arrangem

1982-11-24

1986-07-29

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

350 9616, 372 46, 372 48, H01S 319

Patent

active

046034218

ABSTRACT:
A multi-emitter extended source solid state laser designed to omit light beams at multiple wavelengths within a narrow total spectral bandwidth, that is, a relatively incoherent composite output beam of narrow total spectral bandwidth, is used as the input to a multimode optical fiber of an optic communications link or network. By providing an incoherent composite laser input beam to the fiber, modal noise due to coherence effects are virtually eliminated so that such effects no longer affect network performance. In addition, because the source is extended, a more uniform illumination of the fiber face is achieved. An exemplary multi-emitter laser would consist of an array of simultaneously driven emitting regions or cavities which operate in multiple longitudinal modes.

REFERENCES:
patent: 4318058 (1982-03-01), Mito et al.
Rawson et al, "Speckle in Optical Fibers" SPIE vol. 243 Applications of Speckle Phenomena, 1980, pp. 28-34.
Rawson, "Application of Fiber Optics to Local Networks" Proceedings of the LACN Symposium, May 1979, pp. 155-167.
Scifres et al, "High Power Coupled Multiple Stripe Quantum Well Injection Lasers", Appl. Phys. Lett. 41(2) 15 Jul. 1982, pp. 118-120.
Aiki et al, "A Frequency-Multiplexing Light Source with Monolithically Integrated Lasers", IEEE JQE vol. QE-13, No. 4, Apt. 1977, pp. 220-223.

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