| 简介 |
Device for spectral stabilization of a laser diode, comprising : - a laser diode (1), which emit radiation, and - a control device, the wavelength of the emitted radiation governing, wherein the control device comprises - : - a reference-donor element (3), the emitted radiation of the laser diode (1) is irradiated, - at least one photosensitive element (4, 41, 42), the radiation of the laser diode (1) as the reference on transmission yielding element (3) detected, and - a control unit (5), the output signal of the at least one photosensitive element (4, 41, 42) as a regulating variable for regulation of the laser diode (1) and the laser diode receives (1) then regulates, that the wavelength of the emitted radiation corresponds to a desired target value, wherein the reference - yielding element (3) is formed by a filter combination, the a first filter (31) and a second filter (32) comprises, - the first filter (31) is designed such, that at least one reference line (61) of the first filter (31) in the region of the wavelength of the laser diode by the spectral (1) radiation is emitted, - the second filter (32) and a Fabry-Perot etalon is designed such, that at least one transmission peak, a transmission minimized (62a, 62b) or a transmission of the Fabry-Perot etalon in the spectral region of the flank reference line (61) of the first filter is (31), - the two filters (31, 32) and the at least one photosensitive member (4, 41, 42) are arranged such, that the radiation emitted by laser diode (1) both filters (31, 32) and by radiation transmitted by said at least one photosensitive member radiates (4, 41, 42) is detected, and - the control unit (5) is adapted, as desired value for regulating the laser diode (1) to use a wavelength, the spectral region of the reference line (61) of the first filter (31) and the maxima or minima of the transmission equal to a transmission (62a, 62b) or equal to a point on one of the flanks of the Fabry-Perot etalon is transmission, characterized in, in that the first filter (31) a rare-earth doped... |
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