Passively Q-switched pulsed laser
A pulsed laser and passive technology, applied in the field of lasers, can solve the problems of inaccurate time, large jitter, and affecting the performance of passive Q-switched pulsed lasers, and achieve the effect of reducing peak power jitter and improving performance
Active Publication Date: 2017-09-29
BEIJING INST OF OPTO-ELECTRONIC TECH
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Problems solved by technology
[0004] However, the timing of passively Q-switched laser pulses generated by passively Q-switched pulsed lasers is inaccurate, resulting in unstable peak power of passively Q-switched laser pulses and large jitter, which seriously affects the performance of passively Q-switched pulsed lasers
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[0021] figure 1 A structural diagram of a passively Q-switched pulsed laser provided for an embodiment of the present invention. The passive Q-switched pulsed laser provided by the embodiment of the present invention includes: LD pump source 1, coupling lens 2, resonant cavity 20, electro-optic crystal 8, λ / 4 wave plate 9, polarization beam splitter 10 and control device 21; LD pump The pump source 1, the coupling lens 2, the resonant cavity 20, the electro-optic crystal 8, the λ / 4 wave plate 9 and the polarization beam splitter 10 are arranged coaxially in sequence, and the coaxial arrangement refers to the LD pump source 1, the coupling lens 2, and the resonant cavity 20 , the centers of the electro-optic crystal 8, the λ / 4 wave plate 9 and the components of the polarization beam splitter 10 are on the same straight line; the polarization beam splitter 10 is used to divide the passive Q-switched laser pulse through the λ / 4 wave plate 9 into reference laser pulses 12 and the...
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An embodiment of the present invention provides a passively Q-switched pulsed laser. Including: LD pump source, coupling lens, resonant cavity, electro-optic crystal, λ / 4 wave plate, polarization beam splitter and control device arranged coaxially in sequence; the control device is connected with LD pump source and electro-optic crystal respectively, for The voltage on the electro-optic crystal is adjusted by the reference laser pulse sent by the polarization beam splitter, and the reference laser pulse is one of the two laser pulses output by the polarization beam splitter. In the embodiment of the present invention, the controller adjusts the voltage on the electro-optic crystal according to the reference electrical signal. Since the voltage on the electro-optic crystal determines the ratio of the peak power of the output passively Q-switched laser pulse to the peak power of the reference laser pulse, by controlling the electro-optic The voltage on the crystal can reduce the jitter amplitude of the peak power of the output passive Q-switched laser pulse, and obtain the output passive Q-switched laser pulse with stable peak power, thereby improving the performance of the passive Q-switched pulse laser.
Description
technical field [0001] Embodiments of the present invention relate to the technical field of lasers, in particular to a passively Q-switched pulsed laser. Background technique [0002] With the improvement of laser diode (Laser Diode, referred to as LD) performance, LD pump laser has been developed rapidly. As a kind of LD pump laser, passive Q-switched pulse laser has a compact structure and can generate high peak power. Q-switched laser pulses have broad application prospects in technical fields such as laser detection and laser ranging. [0003] Passively Q-switched pulsed lasers include LD pump sources and laser resonators. The principle of passively Q-switched pulse lasers generated by passively Q-switched pulse lasers is as follows: LD pump sources generate pump lasers, and the pump laser incident on the laser resonator can Saturable absorbing material, because the saturable absorbing material has a strong absorption effect on the wavelength of the pump laser, and wit...
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IPC IPC(8): H01S3/115
Inventor 王涛陆耀东祝敏李鹏宋金鹏刘彦李佳鑫
Owner BEIJING INST OF OPTO-ELECTRONIC TECH