Adjusting method of resonant cavity
An adjustment method and resonant cavity technology, applied in the laser field, can solve problems such as inability to realize laser maintenance and debugging, increased difficulty in resonant cavity adjustment, and larger spot size, achieving simple structure, low cost, and easy implementation
Inactive Publication Date: 2014-06-11
BEIJING GK LASER TECH
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Problems solved by technology
If the helium-neon laser is used as the collimated laser for adjustment, after a long distance of propagation, the spot size becomes larger and the light intensity becomes weaker. In addition, the optical components such as polarizers and wave plates in the regeneration cavity give the adjustment of the resonant cavity. increased difficulty
In addition, it is difficult to obtain helium-neon lasers in some outfields with insufficient conditions, and it will be impossible to maintain and debug laser products. Therefore, using helium-neon lasers as collimated light to adjust lasers will be limited by many applications
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[0016] The adjustment method of the resonant cavity of the present invention comprises the following four steps:
[0017] Step 1: Set the first-end resonant mirror and the second-end resonant mirror at both ends of the optical path of the resonator respectively, and set at least two reflective cavity mirrors between the first-end resonant mirror and the second-end resonant mirror and arranged sequentially along the optical path, the gain medium is arranged between two adjacent reflective cavity mirrors;
[0018] Step 2: Put the signal light gain medium between the first resonant cavity mirror in the resonant cavity optical path and the reflective cavity mirror closest to the first end resonant cavity mirror, and put the signal light output mirror into the signal in the resonant cavity optical path The side of the optical gain medium away from the first end resonant cavity mirror, and the signal light output mirror, the signal light gain medium and the first end resonant cavity...
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The invention relates to an adjusting method of a resonant cavity. The method comprises the steps that a signal light output mirror and a signal light gain medium are additionally arranged at one end of the resonant cavity, so that the signal light output mirror, the signal light gain medium and an end resonant cavity mirror of the resonant cavity form a reference light resonant cavity, the reference light resonant cavity outputs a reference light under the irradiation of a pump light, and the reference light can be used for quickly and accurately adjusting the positions of other reflection cavity mirrors in the resonant cavity. Compared with the cavity mirror adjusting method employing He-Ne light in the prior art, the adjusting method is simpler and more accurate, avoids the limits on use occasions and is particularly applicable to field equipment debugging and maintenance and the like under insufficient conditions. Besides, an adjusting device only comprises the signal light output mirror, so that the structure is simple, the implementation is easy and the cost is low.
Description
technical field [0001] The invention relates to the field of laser technology, in particular to a method for adjusting a resonant cavity of a laser amplifier. Background technique [0002] In the adjustment process of the existing laser resonator, the most widely used method is to adjust the position of each cavity mirror in the resonator by using a He-Ne laser as collimated light. For picosecond ultrashort pulse mode-locked oscillators and regenerative amplifiers, the length of the resonant cavity is usually longer, with a typical value of more than 1m, and in order to make the structure of the device more compact, the longer optical path is usually carried out multiple times. Turning, which increases the number of cavity mirrors to a certain extent. If the helium-neon laser is used as the collimated laser for adjustment, after a long distance of propagation, the spot size becomes larger and the light intensity becomes weaker. In addition, the optical components such as po...
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IPC IPC(8): H01S3/086H01S3/16
Inventor 樊仲维闫莹牛岗石朝辉黄玉涛
Owner BEIJING GK LASER TECH