Method of making an electrically pumped solid-state distributed

Details Method of making an electrically pumped solid-state distributed Method of making an electrically pumped solid-state distributed

1975-08-28

1977-05-17

Ozaki, G.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148171, 148187, 148188, 148 15, 331 945H, 357 18, 357 16, 148 335, H01L 21208, H05B 3300

Patent

active

040239934

ABSTRACT:
An electrically pumped, solid-state laser device having a grating or physical periodic structure in a region, or adjacent a region, of semiconductor material that functions as a light wave guide. The spacing of the perturbations of the periodic structure are selected to be an integer number of half wavelengths of the desired laser wavelength. The electrically pumped, solid-state laser device can be a single heterojunction device or a double heterojunction device. Both devices are formed by a process which provides for formation of the periodic structure prior to formation of the light guiding layer or region. Due to this process a periodic structure having a desired spacing and substantial depth is produced, which structure produces Bragg Scattering which couples and reinforces light traveling through the light guiding layer in both directions in a coherent manner such that reflections are in phase, thus allowing laser operation in the absence of discrete end reflectors.

REFERENCES:
patent: 3691476 (1972-09-01), Hayashi
patent: 3758875 (1973-09-01), Hayashi
patent: 3824493 (1974-07-01), Hakki
patent: 3838359 (1974-09-01), Hakki et al.
patent: 3849790 (1974-11-01), Gottsmann et al.
patent: 3859178 (1975-01-01), Logan et al.
patent: 3868589 (1975-02-01), Wang
Nakamura et al., Applied Physics Letters, vol. 25, No. 9, Nov. 1974, pp. 487 and 488.

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