Laser light source apparatus

Details Laser light source apparatus Laser light source apparatus

1999-06-15

2000-09-19

Font, Frank G.

Coherent light generators

Particular beam control device

Optical output stabilization

372 20, 372 34, 372 4R, H01S 313, H01S 310, H01S 304

Patent

active

061223018

ABSTRACT:
A wavelength locker 4 is provided at one light beam exit end of a laser diode 1. The wavelength locker 4 incorporates an interference optical filter 3, and photo diodes PD1, PD2 for detecting its transmitted light and reflected light. A thermistor 15 and a temperature detector 14 for detecting the temperature of the interference optical filter 3 are provided. Calculating the output ratio of the photo diodes PD1, PD2, the wavelength is controlled so that the correction value by the temperature of the output ratio may be a specified value. The laser diode 1 and wavelength locker 4 are sealed in an optical module 11, and mounted on a substrate together with other blocks. Thus is obtained a laser light source apparatus composed in a simple and small constitution within a emission possible wavelength range of laser light source and capable of emitting stably.

REFERENCES:
patent: 4815081 (1989-03-01), Mahlein et al.
patent: 5438579 (1995-08-01), Eda et al.
H. Ishii et al., "Quasicontinuous Wavelength Tuning in Super-Structure-Grating (SSG) DBR Lasers", IEEE Journal of Quantum Electronics, vol. 32, No. 3, Mar. 1996, pp. 433-441.

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