Coherent light generators – Particular beam control device – Optical output stabilization
Patent
1990-03-29
1991-03-05
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Optical output stabilization
372 92, 372 38, 372 34, 372 43, H01S 313
Patent
active
049982567
ABSTRACT:
In a semiconductor laser apparatus of the invention, a laser beam emitted from a semiconductor laser is collimated by an optical leans, and is subsequently split by a beam splitter in two directions. One split laser beam component is focused on a first photodetector through an optical lens. The other laser beam component is incident on a Fabry-Perot resonator, and is changed in intensity thereby. The laser beam component is then focused on a photodetector through an optical lens. The Fabry-Perot resonator is integrally designed such that dielectric multilayer films are respectively deposited on both the end faces of a crystalized quartz bulk, which is shaped into a columnar shape extending in the C-axis direction, so as to form a pair of reflect filters. Since the bulk is made of crystalized quartz it is not easily influenced by changes in temperature.
REFERENCES:
patent: 4821273 (1989-04-01), Hori
patent: 4907237 (1990-03-01), Dahmani et al.
patent: 4918700 (1990-04-01), Gambini
A. D. White, "Frequency Stabilization of Gas Lasers", IEEE J. Quant, Elect., QE-1, pp. 349-357 (1965).
T. Uchida, "Direct Modulation of Gas Lasers", IEEE J. Quant. Elect., QE-1, pp. 336-343 (1965).
Nakamura Mitsuko
Ohshima Shigeru
Jr. Leon Scott
Kabushiki Kaisha Toshiba
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