Multi-wavelength semiconductor laser array having phase-shift st

Details Multi-wavelength semiconductor laser array having phase-shift st Multi-wavelength semiconductor laser array having phase-shift st

1998-04-15

2000-07-11

Arroyo, Teresa M.

Coherent light generators

Particular beam control device

Producing plural wavelength output

372 50, 372 96, H01S 310, H01S 319, H01S 308

Patent

active

06088374&

ABSTRACT:
A multi-wavelength distributed feedback (DFB) semiconductor laser array is herein disclosed which comprises a plurality of DFB semiconductor laser elements, wherein a grating periodicity is set equal for all the laser elements and, at a plurality of positions in the cavity of each laser element, phase-shift structures of the grating, magnitudes of which are set independently, are placed, whereby an oscillation wavelength of each laser element can be set independently. According to the present invention, a plurality of semiconductor lasers, capable of a stable wavelength operation at the time of semiconductor laser modulation and having a respective, independently-settable oscillation wavelength, can be arranged on one single semiconductor substrate. The present invention further provides a method for time for the gratings, reduces a production cost and is apt for mass production.

REFERENCES:
patent: 5065406 (1991-11-01), Kinoshita
patent: 5953359 (1999-09-01), Yamaguchi et al.
J.E.A. Whiteaway, et al., "The Static and Dynamic Characteristics of Single and Multiple Phase-Shifted DFB Laser Structures", IEEE Journal of Quantum Electronics, vol. 28, No. 5, pp. 7-23, May 1992.

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