Radiation source for laser spectroscopy

Details Radiation source for laser spectroscopy Radiation source for laser spectroscopy

1997-12-03

1999-12-14

Sanghavi, Hemang

Coherent light generators

Particular active media

Semiconductor

372 26, 372 28, 356346, 359254, 422 91, H01S 319

Patent

active

060027029

ABSTRACT:
A laser array for determining the concentrations of gases. A simply acting device and a corresponding process are provided, which make possible a high signal resolution by reducing the interferences without prolonging the measurement time. The interferences occurring in the laser array are reduced by the laser source being set to perform longitudinal oscillations in the direction of the optical axis. These oscillations preferably have a sinus or sawtooth shape, and a frequency in the range of 10 to 1,000 Hz that does not otherwise occur in the laser array and an oscillation amplitude corresponding to one fourth to a multiple of the wavelength of the radiation of the laser source.

REFERENCES:
patent: 4934816 (1990-06-01), Silver et al.
patent: 5331658 (1994-07-01), Shieh et al.
patent: 5411709 (1995-05-01), Furuki et al.
patent: 5698847 (1997-12-01), Yoda et al.

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