Laser preheating method based on modulus track control
A trajectory control and laser technology, which is applied in the field of laser applications, can solve the problems that affect the conversion point of laser frequency stabilization to judge the laser warm-up effect, and cannot accurately and real-time measure the temperature value of the laser tube, so as to reduce the requirements and enhance the accuracy of frequency stabilization degree of effect
Inactive Publication Date: 2012-07-25
HARBIN INST OF TECH
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Problems solved by technology
However, since the temperature sensor of the laser tube is placed on the outer wall of the laser tube and the temperature of the laser tube rises rapidly during the preheating process, the sensor cannot accurately and real-time measure the internal temperature of the laser tube, which in turn affects the judgment of the laser frequency stabilization conversion point and the laser's performance. warm-up effect
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[0016] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0017] A laser preheating method based on modulus trajectory control, the method steps are as follows:
[0018] (1) The laser tube is naturally preheated to a thermal equilibrium state, and the temperature of the laser tube in this state is T b , during which the temperature T of the laser tube and the optical power P of the outgoing dual-frequency laser are recorded 1 and P 2 And the power difference ΔP=P 1 -P 2 ;
[0019] (2) According to the relationship between the power difference ΔP and the temperature T, calculate the temperature T that the laser tube rises every time a mode is changed δ ;
[0020] (3) Determine the frequency stabilization control point temperature T of the laser set , and T set >T b ;
[0021] (4) Turn on the laser and measure the initial temperature T of the laser tube 0 , and according to T 0 and T set Plan the m...
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The invention relates to a laser preheating method based on modulus track control and belongs to the technical field of laser application. According to the method, firstly, the temperature change value required by replacing each mold of a laser tube is determined, then, the temperature of frequency stabilization converting points and the initial temperature of the laser tube are determined, the preheating modulus track of the laser tube is planned according to the data, and the difference value between the modulus point Ni (I equals to 0, 1, 2 to n) on the track and the conversion modulus M in the laser preheating stage are monitored in the special time point, wherein n is the modulus value of the laser pipe required from the preheating starting to the preheating completion, a controller regulates the heating voltage of a laser according to the difference value of the M and the Ni, the M value and the Ni value are kept identical, and when the modulus counting value M of the laser equals to the n, the preheating is completed, and the operation can enter the frequency stabilization control stage. The method has the advantages that the requirement on the temperature real-time measurement in the preheating process can be reduced, the frequency stabilization converting points are favorably and precisely judged, and the frequency stabilization precision of the laser is enhanced.
Description
technical field [0001] The invention belongs to the technical field of laser applications, and mainly relates to a laser preheating method based on modulus trajectory control. Background technique [0002] In the field of laser application technology, the laser preheating control algorithm will affect the frequency stabilization accuracy of the laser, which is manifested in that the temperature of the frequency stabilization conversion point affects the frequency of the laser output light. The traditional laser preheating method uses a constant value heating method. If the ambient temperature of the laser is greatly different, it is difficult to obtain the expected preheating effect. In recent years, Harbin Institute of Technology proposed a Zeeman frequency-stabilized laser preheating method based on temperature trajectory control. This method can significantly reduce the warm-up time, improve the frequency stabilization efficiency, and at the same time, take into account ...
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Inventor 谭久彬刁晓飞白洋胡鹏程
Owner HARBIN INST OF TECH