Laser beam emitting apparatus

Coherent light generators – Particular beam control device – Having particular beam control circuit component

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372 38, 372 24, 372 33, 372 43, H01S 313

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active

047633344

ABSTRACT:
A laser beam emitting apparatus includes a semiconductor laser, a photodiode for detecting the intensity of the laser beam, an amplifier for amplifying the detection signal from the photodiode, and a variable resistor connected to the amplifier for adjusting the gain of the amplifier. In one embodiment, these elements are provided in a unit structure so that the adjustment of the gain of the amplifier can be carried out in advance. In another embodiment, a collimating lens for collimating the laser beam emitted from the laser is also provided in the same unit. In another embodiment, a single-piece support is provided to support the semiconductor laser, the collimating lens, and an aperture plate formed with an aperture for shaping the collimated laser beam. As a modification, the single-piece support can be made dual in structure while maintaining the structural integrity of the support.

REFERENCES:
patent: 3898583 (1975-08-01), Shuey
patent: 4003074 (1977-01-01), Yonezu et al.
patent: 4237427 (1980-12-01), Holland
patent: 4338577 (1982-07-01), Sato
patent: 4399541 (1983-08-01), Kovats et al.
patent: 4562579 (1985-12-01), Harada
patent: 4567598 (1986-01-01), Noguchi et al.
patent: 4618958 (1986-10-01), Shibata et al.
patent: 4661959 (1987-04-01), Kaneko
Wittke et al.; Stabilization of CW Injection Lasers" RCA Tech. Notes, TN No. 1005, Apr. 9, 1975.

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