Power stabilizing device and method for laser device

Abstract

The invention discloses power stabilizing device and method for a laser device. The power stabilizing device comprises the laser device, a focusing lens, nonlinear crystal, a spectroscope, a landfill pond, a lambda / 2 wave plate, a polarization beam splitter, a photoelectric detector and a controller, wherein an output light beam of the laser device is focused in the nonlinear crystal through the focusing lens; a small part of laser is converted into frequency-doubled light; a transmitted beam of the nonlinear crystal passes through the spectroscope; fundamental light is separated from the frequency-doubled light; the frequency-doubled light is introduced into the landfall pond; the fundamental light sequentially passes through the lambda / 2 wave plate and the polarization beam splitter and is divided into two beams of light; transmitted light is output as main laser; reflected light enters the photoelectric detector; an output signal of the photoelectric detector enters a controller; and the controller generates a control signal to control the temperature of the nonlinear crystal, so as to stabilize the laser power. According to the power stabilizing method disclosed by the invention, the frequency-doubling conversion efficiency is changed by controlling the temperature of the nonlinear crystal; the frequency-doubling loss of the laser beams is changed; and fluctuation of the laser power is compensated, so as to reach the target of stabilizing the laser power.

Description

technical field

[0001] The invention relates to the technical field of laser stabilization, in particular to a laser power stabilization device and method. technical background

[0002] With its excellent characteristics, lasers are widely used in communication, industrial manufacturing, precision measurement, gravitational wave detection and scientific research. In recent years, with the further deepening of research, high-power lasers have become more and more important. The stability of laser power has always been a matter of great concern. In order to stabilize the laser power without affecting the frequency stability of the laser, the electro-optic modulator or acousto-optic modulator placed in the output optical path of the laser is generally controlled by photoelectric negative feedback. To stabilize the laser output power. However, due to the low optical damage threshold of electro-optic modulators or acousto-optic modulators, they are not suitable for stabilizing ...

Examples

Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] like figure 1 As shown, a laser power stabilization device includes a laser 1, a focusing lens 2, a nonlinear crystal 3, a beam splitter 4, a garbage pool 5, a λ / 2 wave plate 6, a polarizing beam splitter 7, a photodetector 8 and Controller 9; the nonlinear crystal 3 is characterized in that the nonlinear crystal 3 is a frequency doubling crystal, and placed in a red copper temperature-controlled furnace; the nonlinear crystal 3 is placed at the focal point of the focusing lens 2, and the entire The output beam of the solid-state laser 1 is focused in the nonlinear crystal 3 by the focusing lens 2, and part of the laser light is converted into frequency-doubled light; the transmitted beam of the nonlinear crystal 3 is separated from the fundamental frequency light and the frequency-doubled light by the beam splitter 4, and the frequency-doubled light is introduced i...

technical field

[0001] The invention relates to the technical field of laser stabilization, in particular to a laser power stabilization device and method. technical background

[0002] With its excellent characteristics, lasers are widely used in communication, industrial manufacturing, precision measurement, gravitational wave detection and scientific research. In recent years, with the further deepening of research, high-power lasers have become more and more important. The stability of laser power has always been a matter of great concern. In order to stabilize the laser power without affecting the frequency stability of the laser, the electro-optic modulator or acousto-optic modulator placed in the output optical path of the laser is generally controlled by photoelectric negative feedback. To stabilize the laser output power. However, due to the low optical damage threshold of electro-optic modulators or acousto-optic modulators, they are not suitable for stabilizing ...

Examples

Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] like figure 1 As shown, a laser power stabilization device includes a laser 1, a focusing lens 2, a nonlinear crystal 3, a beam splitter 4, a garbage pool 5, a λ / 2 wave plate 6, a polarizing beam splitter 7, a photodetector 8 and Controller 9; the nonlinear crystal 3 is characterized in that the nonlinear crystal 3 is a frequency doubling crystal, and placed in a red copper temperature-controlled furnace; the nonlinear crystal 3 is placed at the focal point of the focusing lens 2, and the entire The output beam of the solid-state laser 1 is focused in the nonlinear crystal 3 by the focusing lens 2, and part of the laser light is converted into frequency-doubled light; the transmitted beam of the nonlinear crystal 3 is separated from the fundamental frequency light and the frequency-doubled light by the beam splitter 4, and the frequency-doubled light is introduced i...

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