Analog optical fiber communication system, and laser adapted for

Details Analog optical fiber communication system, and laser adapted for Analog optical fiber communication system, and laser adapted for

1992-07-17

1994-02-08

Davie, James W.

Coherent light generators

Particular resonant cavity

Distributed feedback

372 49, H01S 308

Patent

active

052854680

ABSTRACT:
We have discovered that the yield of DFB lasers suitable, e.g., for use in AM CATV systems can be substantially increased if the lasers have a back facet with a higher reflectivity (>80%, preferably >90%) HR coating thereon than is conventional (e.g., .about.65%). Exemplary currently preferred embodiments of the invention comprise a three-pair stack of .lambda./4 yttrium-stablized zirconia/Si having about 95% reflectivity.

REFERENCES:
patent: 4749255 (1988-06-01), Chakrabarti et al.
patent: 4815089 (1989-03-01), Miyauchi et al.
patent: 4993036 (1991-02-01), Ikeda et al.
patent: 5111475 (1992-05-01), Ackerman et al.
"Growth and Characterization of High Yield, Reliable, High-Power, High-Speed, InP/GaAsP Capped Mesa Buried Heterostructure Distributed Feedback (CMBH-DFB) Lasers", by J. L. Zilko et al, IEEE Journal of Quantum Electronics, vol. 25, No. 10, Oct. 1989, pp. 2091-2095.
"High-Fidelity Lightwave Tramsmission of Multiple AM-VSB NTSC Signals", by J. Lipson et al, IEEE Transactions on Microwave Theory and Techniques, vol. 38, No. 5, May 1990, pp. 483-493.

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