Semiconductor laser unit

Details Semiconductor laser unit Semiconductor laser unit

1988-10-17

1990-05-15

Sikes, William L.

Coherent light generators

Particular active media

Semiconductor

372 38, 372 29, 357 74, 357 19, 357 75, 357 80, H01S 319

Patent

active

049264338

ABSTRACT:
A semiconductor laser unit includes a casing, a printed circuit board fastened to the casing, and a laser diode unit which includes a laser diode and a photodiode for monitoring a laser beam emitted from the laser diode. The laser diode unit is accommodated in the casing. The semiconductor laser unit also includes a monitor output amplifier for amplifying an output signal of the photodiode, and a reference voltage generator for generating a reference voltage signal which is to be compared with an output voltage signal of the monitor output amplifying means in order to set a light intensity of the laser beam to a predetermined value.

REFERENCES:
patent: 4703334 (1987-10-01), Machimaru et al.
patent: 4763334 (1988-08-01), Shimada et al.

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