A constant power output control method of Q-switched semiconductor laser
A technology of output control and optical power, which is applied to semiconductor lasers, devices for controlling laser output parameters, lasers, etc., can solve the problems of small adjustable range, fast circuit aging, and low control accuracy
Active Publication Date: 2019-01-08
深圳瑞丰恒激光技术有限公司
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The adjustable range of this solution is relatively small, and it will affect the life of the pump, so the circuit aging is relatively fast, the control accuracy is relatively low, the flexibility is poor, the cost is high, and the long-term stability is relatively poor
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[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
[0017] figure 1 A schematic structural diagram of a...
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The invention provides a Q-switched semiconductor laser constant power output control method. The error between laser output power and target power is monitored in real time. When the absolute value of the error is greater than the preset adjustment threshold, one or multiple parameters of an energy storage time parameter, a frequency multiplication temperature parameter and / or a pump current parameter is / are traversed, and the laser is adjusted by using the parameter enabling the optical power quantification error to be lower than the adjustment threshold so as to control the error between the laser output power and the target power. The optical power is monitored and adjusted in real time, and laser constant power output is realized by parameter automatic optimization without artificial participation so that the method has the advantages of being low in cost, high in flexibility and high in control accuracy and is more suitable for marking, cutting and other applications of strict requirements.
Description
technical field [0001] The invention relates to the technical field of semiconductor lasers, in particular to a constant power output control method of a Q-switched semiconductor laser. Background technique [0002] The emergence and application of laser Q-switching technology is a major breakthrough in the history of laser development. Through Q-switching technology, the general output continuous or pulsed laser energy is compressed into extremely narrow pulses for emission, so that the peak power of the laser can be increased by several orders of magnitude. As a result, semiconductor lasers with high power and high repetition rate are widely used in many fields such as material processing, laser medicine, laser ranging, radar, guidance, high-speed photography, high-resolution spectroscopy and nuclear fusion. Frequency doubling technology is a second-order nonlinear optical effect, which is widely used in laser technology. Q-switching technology not only greatly increases...
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IPC IPC(8): H01S5/06H01S5/0683
CPCH01S5/0615H01S5/0683
Inventor 陶孝收胡德洲郑全昌黄梓能李嘉雄
Owner 深圳瑞丰恒激光技术有限公司