Pound-Drever-Hall digital laser frequency stabilizing system with multi-phase filtering structure
A technology of polyphase filtering and filtering structure, which is applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of radio frequency signal long-term amplitude instability, quantization error, and reduce frequency stabilization accuracy, etc., to achieve fully automatic The effects of tracking and locking, reducing measurement and calculation errors, and improving frequency stabilization accuracy
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[0020] The present invention will be described in detail below with reference to the drawings and specific embodiments.
[0021] Reference figure 1 , Pound-Drever-Hall digital laser frequency stabilization system with multiple filter structures, including laser source 1. The laser output from laser source 1 enters polarizer 3 through optical isolator 2. The function of optical isolator 2 is to prevent reflected light from entering the laser 1 Affect its working stability; Polarizer 3 adjusts the polarization direction of the laser incident on the electro-optic modulator 4 to reduce the residual amplitude modulation; the output light of the polarizer 3 enters the electro-optic modulator 4 for phase modulation, and the modulation frequency is the radio frequency The frequency of the signal source 15. The radio frequency signal source 15 generates a frequency of f 0 The sine signal of, provides drive for the electro-optic modulator 4. The phase-modulated light enters the polarizati...
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