Process of adjustment of a continuously tunable light source

Details Process of adjustment of a continuously tunable light source Process of adjustment of a continuously tunable light source

1993-04-12

1994-09-13

Epps, Georgia Y.

Coherent light generators

Particular beam control device

Tuning

372 29, 372 32, 372102, H01S 310

Patent

active

053475275

ABSTRACT:
This invention relates to a continuously tunable external cavity light source and a process for adjusting the source. The source includes a laser, a diffraction grating placed on the laser's axis that together with the laser forms an external cavity, and an arm rigidly connected to the diffraction grating and having a mobile end permanently in contact with a slide plane perpendicular to the laser's optical axis. The source is tuned by shifting the diffraction grating. Fine adjustment of the slide plane is achieved by simultaneously rotating the grating and measuring the emissive power of the source as a function of the grating rotation. The number of jumps of the emissive power is counted with respect to the current injected, fine adjustment means are used in accordance with result of the count, and the counting and fine adjustment steps are repeated until the result of the count is zero.

REFERENCES:
Favre, F., and Le Guen, L., "82 nm of Continuous Tunability for an External Cavity Semiconductor Laser", Electronics Letters, vol. 27, No. 2, Jan. 17, 1991, pp. 183-184.

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