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High-power intracavity frequency-doubled single-frequency laser device

A high-power, laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems affecting the single-frequency operation characteristics of the laser, the laser cannot operate in one direction, and the cavity mode beam distortion, etc., to improve the single-frequency operation. Running characteristics, improved thermal lens effect, high stability effect

Active Publication Date: 2015-04-29
SHANXI UNIV
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Problems solved by technology

The former will lead to cavity mode beam distortion, and the latter two will lead to changes in the Faraday rotation angle and affect the isolation ratio, so that the laser cannot operate in one direction, and ultimately affect the single-frequency operation characteristics of the laser

Method used

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0020] figure 1 A high-power intracavity frequency-doubled single-frequency laser designed for the present invention includes a pump source 5 , a gain crystal 6 , a ring resonator, a one-way device and a frequency-doubled crystal 9 . The central wavelength of the laser emitted by the pumping source 5 is 888nm, the fiber core diameter is 400μm, the numerical aperture is 0.22, and the maximum output power is 80W. The use of 888nm pump light can reduce the heat generated by the quantum deficit on the one hand, and on the other hand, the gain crystal 6 can improve the stability of laser operation due to its non-polarized absorption characteristics. The resonant cavity adopts a four-mirror annular resonant cavity structure, which is composed of a concave-convex mirror 4, a plano-convex mirror 3, and two plano-concave mirrors (the first plano-concave mirror 1 and the secon...

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Abstract

The invention provides a high-power intracavity frequency-doubled single-frequency laser device. The high-power intracavity frequency-doubled single-frequency laser device comprises a pumping source (5), a gain crystal (6), an annular resonant cavity, a one-way device and a frequency doubling crystal (9), wherein a first flat concave mirror (1) constituting the annular resonant cavity is plated with a film which allows base-frequency light to transmit to a certain degree and allows frequency-doubling light to transmit easily, the first flat concave mirror (1) constitutes the annular resonant cavity of the laser device on one hand, the thermal lens effect of a TGG crystal (7) constituting the one-way device can be adjusted and controlled by adjusting and controlling the intracavity power density of the laser device by means of the plated film on the other hand, and thus efficient and high-power single-frequency operation of the laser device is achieved. According to the high-power intracavity frequency-doubled single-frequency laser device, the influence of the thermal lens effect of the TGG crystal (7) on the laser device is reduced on the basis that the output power of the laser device is not affected, and thus the laser device can operate more stably on the basis that high output power can be obtained through the laser device.

Description

technical field [0001] The invention relates to a single-frequency laser, in particular to an inner-cavity frequency-multiplied single-frequency laser capable of realizing high-power output. Background technique [0002] All-solid-state intracavity frequency-doubled single-frequency lasers are widely used in quantum optics, quantum communication, holography, ultrafine spectroscopy and Cold atomic physics and other fields. At present, there are many methods to achieve single-frequency operation of lasers, such as torsional cavity, short resonant cavity, etalon mode selection and birefringence filter mode selection. However, in order to obtain a high-output all-solid-state CW intracavity frequency-doubled single-frequency laser, a ring resonator containing an optical one-way device is usually used to select the mode by eliminating the spatial hole-burning effect, and finally make the laser operate stably at a single frequency . The optical one-way device includes a Faraday ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/109H01S3/10
Inventor 卢华东尹祺巍彭堃墀
Owner SHANXI UNIV
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