Round-trip through laser amplifier and method for improving light beam quality

A laser amplifier and beam quality technology, applied in lasers, laser parts, phonon exciters, etc., can solve problems such as unfavorable laser power, limit the scope of application, and improve, achieve high-power laser output, control beam quality, improve The effect of beam quality

Inactive Publication Date: 2013-05-22
ZHEJIANG UNIV
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Benefits of technology

This technology allows for improved performance of lasers without sacrificing their brightness or producing less powerful beams compared to existing designs. Instead, it introduces two new feature - one called the lasor' s hollow chamber (laser) itself), where there are multiple layers containing different materials like rare earth elements. These layers help improve the efficiency of excitation process within each layer while reducing heat generation during operation. Additionally, these techniques allow for precise placement of planar mirrors on specific positions inside the device, allowing for more efficient use of space outside the device. Overall, this innovative technique helps achieve both increased energy conversion and enhanced beam quality through direct inputting of laser radiation onto the amplifying stages.

Problems solved by technology

The technical problem addressed in this patents relating to improving the efficient transferring of optical signals between different components during laser communication systems involves achieving better results for improved outcomes due to reduced heat generation and increased coolant flow within the lasers themselves while also minimizing any harmful effects they may have upon other materials inside them.

Method used

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  • Round-trip through laser amplifier and method for improving light beam quality
  • Round-trip through laser amplifier and method for improving light beam quality
  • Round-trip through laser amplifier and method for improving light beam quality

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Embodiment 1

[0032] Such as figure 2 As shown, a total reflection mirror 1, an oscillation-level gain medium (first laser gain medium) 2, an output mirror 3, an isolation beam splitting device 4, an amplifier-level gain medium (second laser gain medium) 5, and a plane are placed in sequence along the optical axis. Mirror 7.

[0033] The oscillation stage uses the fundamental mode to dynamically stabilize the asymmetric laser resonator. The oscillator-level gain medium uses Nd:YAG crystals connected in series with two rods, and a 90° quartz rotator and 4f system are added in the middle to compensate for its thermally induced birefringence effect. A single Nd:YAG laser crystal has a diameter of 3mm and a length of 65mm. When the working current is 18A, the output power is 55W, and the measured beam quality factor M x 2 =1.44, M y 2 =1.43, the output beam is close to the fundamental mode. The beam radius on the output mirror is 0.42mm, and the divergence angle is 1mrad. The distance L1

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Abstract

The invention discloses a round-trip through laser amplifier for improving light beam quality, and so that the quality of light beam which passes through the laser amplifier in a round-trip mode can be improved obviously. The invention further discloses a method for improving the light beam quality based on the round-trip laser amplifier. The position of a plane mirror is adjusted for regulating the angle of divergence and the radius of light beam which enters into an amplifier stage for the second time. A laser amplification system which is designed according to the design method not only can obtain high power laser output but also can effectively control the light beam quality of amplifier stage output by adjusting the position of the plane mirror on the rear portion of the amplifier stage and amplifier stage working currents under the condition that high power lasing diode pumping is used.

Description

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Claims

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Application Information

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Owner ZHEJIANG UNIV
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