Device and method for stabilizing laser extracavity power
A technology for stabilizing devices and stabilizing methods, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems that stable power cannot guarantee frequency (wavelength) stability, etc., and achieve real-time control and display, easy adjustment, and optical path simple effect
Inactive Publication Date: 2017-03-15
SHANXI UNIV
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[0003] In order to solve the technical problem that the current laser stabilization method cannot guarantee the frequency (wavelength) stability while stabilizing the power, the present invention provides a laser external power stabilization device and its method
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[0025] A laser external power stabilization device, comprising a laser system 1, a first λ / 2 wave plate 2 and a polarization beam splitter 4 are sequentially arranged on the outgoing optical path of the laser system 1, and a first λ / 2 wave plate 2 and a polarization beam splitter 4 are sequentially arranged on the transmission optical path of the polarization beam splitter 4 There is a second λ / 2 wave plate 3 and an acousto-optic modulator 5; a photodetector 6 is provided on the reflected optical path of the polarization beam splitter 4, and a signal output terminal of the photodetector 6) is connected with a built-in labview-based A computer control unit for data processing and PID control program; the signal output end of the computer control unit is connected with the drive modulation port of the acousto-optic modulator 5 .
[0026] Described computer control unit comprises computer 7 and the PCI-1742U data input and output card 8 that is built in computer 7; The signal outp...
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The invention relates to a linear polarization laser power stabilization technique, in particular to a laser extra-cavity power stabilization device and a laser extra-cavity power stabilization method. The device and the method solve the technical problem that the current laser stabilization method cannot ensure frequency stabilization during power stabilization. The laser extra-cavity power stabilization device comprises a laser device system, wherein a first lambda / 2 wave plate and a polarization beam splitter are sequentially arranged on an emitted light path of the polarization beam splitter; a second lambda / 2 wave plate and an acoustic optical modulator are sequentially arranged on a transmitted light path of the polarization beam splitter; a photoelectric detector is arranged on a reflected light path of the polarization beam splitter; a signal output end of the photoelectric detector is connected with a computer control unit which is internally provided with a data processing and PID (Proportion Integration Differentiation) control program based on labview; and a signal output end of the computer control unit is connected with a driving modulation port of the acoustic optical modulator. The device and the method can achieve high-accuracy stabilization control of linear polarization laser; the light paths are simple; adjustment is easy; and real-time control and display of laser power are achieved.
Description
technical field [0001] The invention relates to a linearly polarized laser power stabilization technology, especially a PID control method based on computer input and output cards and programs, which can realize the stabilization of the extracavity power of the laser system, specifically a laser extracavity power stabilization device and its method . Background technique [0002] Laser technology has a wide range of applications in many fields such as communication, medical treatment, industrial manufacturing and scientific research. Laser power stability is a critical factor in these applications. The optical power can be stabilized by adjusting the resonant cavity of the laser or directly adjusting the driving source through a negative feedback system. However, the traditional negative feedback method and device will also change the output wavelength of the laser while adjusting the optical power, which cannot meet the requirements for high laser power and frequency stab...
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IPC IPC(8): H01S3/137H01S3/13
Inventor 张临杰杨文广赵建明贾锁堂
Owner SHANXI UNIV