Hybrid distributed bragg reflector laser

Details Hybrid distributed bragg reflector laser Hybrid distributed bragg reflector laser

1987-03-31

1988-11-22

Lee, John D.

Coherent light generators

Particular component circuitry

Optical pumping

372 20, 372 96, G02B 634

Patent

active

047861320

ABSTRACT:
A mechanism for achieving single frequency output in a semiconductor laser diode is disclosed. In accordance with the invention, a conventional laser diode having an anti-reflection coating on its output facet is coupled to a single mode fiber output pigtail having an anti-reflection coating on its input facet. The anti-reflection coatings suppress Fabry-Perot type feedback which would normally be effective for a large number of wavelengths. The fiber includes a built-in distributed Bragg reflector grating, which grating is located just beyond the output fiber input facet. The grating supplies feedback that is effective only over a narrow wavelength band approximating the wavelength spacing between the actual longitudinal modes of the structure so that the laser produces only a single frequency output.

REFERENCES:
patent: 4156206 (1979-05-01), Comerford et al.
patent: 4466694 (1984-08-01), MacDonald
patent: 4704720 (1987-11-01), Yamaguchi
C. A. Park, et al. "Single-Mode Behavior, etc.", Electronics Letters, vol. 22, No. 21 Oct. 1986.

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