Semiconductor laser including periodic structures with different

Details Semiconductor laser including periodic structures with different Semiconductor laser including periodic structures with different

1993-05-10

1995-01-31

Davie, James W.

Coherent light generators

Particular resonant cavity

Distributed feedback

372 32, H01S 308

Patent

active

053864336

ABSTRACT:
A single wavelength oscillating semiconductor laser device having at least two diffraction gratings in an active region in which the order of a first diffraction grating disposed in the center of the laser is higher than that of a second diffraction grating disposed in the neighborhood of resonator facets.

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Striefer et al, "Coupling Coefficients For Distributed Feedback Single-And Double-Heterostructure Diode Lasers", IEEE Journal of Quantum Electronics, vol. OE-11, No. 11, Nov. 1975, pp. 867-873.
Johnson, "Optical Writing of Dense 1000-.ANG. Features In Photoresist", Applied Optics, vol. 21, No. 11, 1 Jun. 1982, p. 1892.
"Production Of .lambda./4 Shift Diffraction Grating Using Phase Shift Film", 26p-T-8, Prescript of Autumn Meeting, 1986, Japanese Association of Applied Physics (no month).
"20-DFB Laser Arrays Fabricated By SOR Lithography", IOOC 1989, 21D3-1 (no month).
".lambda./4 Shift Diffraction Grating Using Novolak Series Negative/Positive Resist", 2a-N-9, Prescript of Autumn Meeting, 1985, Japanese Association of Applied Physics (no month).

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