Selection method of optimal length of frequency doubling crystal for continuous wave single frequency intracavity frequency doubling laser
A frequency-doubling laser and frequency-doubling crystal technology, applied in the laser field, can solve problems such as lack of consideration and inapplicability, and achieve the effects of simple experimental device and process, low cost and universal applicability
Active Publication Date: 2020-02-14
TAIYUAN SHANDA YUGUANG TECHNOLOGICAL
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Problems solved by technology
However, this method lacks consideration of the influence of the linear loss in the cavity on the single-frequency operation characteristics of the intracavity frequency doubling laser, and is not suitable for the selection of the optimal length of the frequency doubling crystal in high-power intracavity frequency doubling lasers where the linear loss cannot be ignored.
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Embodiment approach 1
[0048] Implementation mode one: figure 2 Shown is the device for selecting the optimal length of the frequency doubling crystal in the cavity of the four-mirror ring resonator in the present invention, including a pump source 1, a gain crystal 2, and a ring resonator composed of cavity mirrors (12, 13, 14, 15) , a one-way device composed of a magneto-optical medium 3 and a half-wave plate 4 placed in a permanent magnet, a frequency doubling crystal 5, a beam splitter 6, a power meter 7, a focusing lens 8, an F-P interferometer 9, a detector 10 and an oscilloscope 11. The pump light is coupled and focused to the center of the gain crystal 2, and the laser adopts a four-mirror ring resonant cavity structure, which is composed of cavity mirrors (12, 13, 14, 15). The cavity mirror 12 is a concave-convex mirror, the concave coating reduces the reflection of the pump light, and the convex coating reduces the pump light and opposes the high reflection of the fundamental frequency l...
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Abstract
The invention discloses a selection method of frequency doubling crystal optimal length of a continuous wave single frequency inner cavity frequency doubling laser. In selecting of the frequency doubling crystal optimal length of the inner cavity frequency doubling laser, influence of the frequency doubling crystal length on the stable operation characteristic of the inner cavity frequency doubling laser is taken into consideration; in selecting of the frequency doubling crystal optimal length of the continuous wave single frequency inner cavity frequency doubling laser, single frequency stable operation of the inner cavity frequency doubling laser passively realized by constantly changing the frequency doubling crystals of different lengths in experiments is not needed; the selection method has universal applicability, and is suitable for high-power, middle-power and low-power inner cavity frequency doubling laser, and the inner cavity frequency doubling laser with standard dies and other selecting elements in the cavity; and the experimental apparatus and process adopted in the invention are simple, other systems are not needed, and the cost is low.
Description
technical field [0001] The invention relates to the field of laser technology, in particular to a method for selecting the optimal length of a frequency-doubling crystal for a continuous-wave single-frequency intracavity frequency-doubling laser. Background technique [0002] CW single-frequency intracavity frequency-doubled lasers are widely used in quantum information, quantum communication, cold atomic physics and other fields due to their high output power, good beam quality, narrow linewidth, high long-term power stability, and low noise. . In the research and production of CW single-frequency intracavity frequency doubling lasers, the length of the intracavity frequency doubling crystal is a key quantity. Because the length of the frequency doubling crystal in the intracavity frequency doubling laser not only affects the output power of the frequency doubling light, but also determines the single frequency operation characteristics of the intracavity frequency doublin...
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IPC IPC(8): H01S3/109
CPCH01S3/109
Inventor 卢华东郭永瑞苏静彭堃墀
Owner TAIYUAN SHANDA YUGUANG TECHNOLOGICAL