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Cavity tunable laser dual frequency and method of adjusting the difference of frequencies between a wave ordinary and extraordinary wave of a laser dual frequency
Cavity tunable laser dual frequency and method of adjusting the difference of frequencies between a wave ordinary and extraordinary wave of a laser dual frequency
The present invention relates to a cavity of the transmission of a laser of dual-frequency (l), of the type comprising an input mirror (1) and at least one laser crystal (5), said laser crystal (5) being able to emit a laser wave (o), ordinary and extraordinary laser (o) of different frequencies when the laser crystal is energized by at least one pumping light beam (fp1, fp2) introduced by the input mirror, characterized in that it comprises an optical coupling device (co) positioned at an output of the cavity, the optical coupling device (co) comprising at least a bragg grating, by volume (3, 4) operating in reflection, the network (x) of the bragg grating (3, 4) having a horizontal chosen so as to partially reflect a resonant wavelength situated in the spectral range of the gain of the laser wave (o, o) on the optical path of which it is disposed.
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