Arrangement for operating a laser diode

Details Arrangement for operating a laser diode Arrangement for operating a laser diode

1991-12-09

1993-02-09

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

250205, 372 32, G01B 1102, H01S 3133

Patent

active

051856433

ABSTRACT:
The invention is directed to an arrangement for operating a laser diode. A two-stage stabilization circuit is provided for stabilizing the wavelength of a laser diode to exactly defined values for its use in distance measuring interferometers. In addition to presetting the operating parameters of current and temperature of the laser diode, the emitted wavelength of the laser diode is controlled to a predetermined transmission maximum of a Fabry-Perot interferometer. At switch-on, a control program can be called up and compute new values for the operating parameters premised on the last measured values of the operating parameters and initially determined and stored coefficients. In this way, the program always reliably sets the wavelength of the laser diode to the same transmission maximum.

REFERENCES:
patent: 4583228 (1986-04-01), Brown et al.
"Wavelength Control of a Diode Laser for Distance Measuring Interferometry" by F. Crosdale et al., SPIE, vol. 1219, Laser-Diode Technology Applications II (1990), pp. 490 to 503.

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