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Confocal unstable resonator Raman laser with seed light

A Raman laser and unstable cavity technology, which is applied in lasers, phonon exciters, laser components, etc., can solve the problems of less applications, low Raman gain, and large Raman frequency shift, so as to reduce the light threshold, The effect of increasing the output power

Active Publication Date: 2015-09-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the solid Raman medium has a relatively high gain, its damage threshold is significantly lower than that of gas, so only gas can be used as a Raman medium for Raman lasers with high-energy lasers as the pump source.
In addition, if the required Raman frequency shift is relatively large, only gas Raman media can be selected.
Because the density of gas molecules is lower than that of solids, the Raman gain is relatively low, the threshold of Raman light laser is high, it is difficult to start vibration, and it is not easy to realize stimulated Raman
[0005] Seed light input is a widely used method to reduce the laser output threshold and improve the laser beam quality, but its application in Raman lasers is still relatively small

Method used

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  • Confocal unstable resonator Raman laser with seed light
  • Confocal unstable resonator Raman laser with seed light

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Embodiment 1

[0032] Such as figure 1 Shown:

[0033] A confocal unstable cavity Raman laser with seed light, comprising a telephoto concave mirror 1, a telephoto concave mirror 2 7, a short focal concave mirror 6 and a dichroic mirror 3, characterized in that:

[0034] Through the two effects of transmission and reflection of the dichroic mirror 3, the telephoto concave mirror one 1 and the telephoto concave mirror two 7 all form a confocal unstable cavity with the short focal concave mirror 6, and between the dichroic mirror 3 and the short The light paths overlap between the focal concave mirrors 6;

[0035] Place the dichroic mirror 3, the scraper mirror 4, the Raman cell 5 and the short-focus concave mirror 6 in sequence on the straight main optical path where the axis of the short-focus concave mirror 6 is located;

[0036] Dichroic mirror 3 is provided with telephoto concave mirror 2 7 or telephoto concave mirror 1 on the transmitted light path away from short-focus concave mirror ...

Embodiment 2

[0046] Others are the same as in Embodiment 1, except that the gas in the Raman cell is replaced with methane, then the wavelength output of 1543nm can be realized. This wavelength is an important communication wavelength, a safe wavelength for human eyes, and the sea transmission efficiency is relatively high.

Embodiment 3

[0048] When the position of cavity 1 / 2 in embodiment 1 is reversed, that is, the pump light gain medium 2 is moved between the telephoto concave mirror 2 7 and the dichroic mirror 3, and the transmission of the dichroic mirror 3 is selected simultaneously. The reflection wavelength is reversed to form the third embodiment. The pump light cavity is a folded cavity, while the Raman light cavity is a linear cavity. This conversion is only a geometric conversion and does not affect the work of the Raman laser. Principle, its working principle is still the same as that of Embodiment 1.

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Abstract

The invention discloses a confocal unstable resonator Raman laser with seed light. The confocal unstable resonator Raman laser comprises confocal unstable resonators I and II which share a part of light path on the side of a short-focus reflector, and respectively and correspondingly generate pumped wavelength [lambda]1 oscillation and Raman wavelength[lambda]2 oscillation; and a dichroscope is utilized to realize resonance of pumped light and Raman light in respective optical cavities. The two optical cavities are provided with a common focus. A Raman cell is arranged on the common focus and fully receives the pumped light whose wavelength is [lambda]1 to generate the Raman light whose wavelength is [lambda]2. In addition, the working characteristics of the confocal unstable resonators are simultaneously utilized, a scraper mirror is used to send the seed light into the confocal unstable resonator II corresponding to the Raman light, and a lower excited Raman threshold and higher Raman laser output are realized.

Description

technical field [0001] The invention relates to a Raman laser, in particular to a confocal unstable cavity Raman laser with seed light. Background technique [0002] The Raman laser generates Raman wavelength laser light by the interaction between the pump light and the Raman gain medium placed in the Raman optical cavity. This is a nonlinear optical technology. Through the selection of various Raman active media, it can A certain wavelength laser is used as the pump source to realize the output of multiple longer-wavelength lasers. [0003] At present, the solid medium Raman laser has been developed relatively maturely, and usually has a pump light cavity to generate pump light. The pump light acts on the Raman gain medium, and the generated Raman wavelength light acts in the Raman light cavity. Vibrate to generate Raman laser output. Common Raman lasers have the form of ordinary optical element optical path and optical fiber optical path. [0004] Although solid Raman m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/30H01S3/08H01S3/081
Inventor 郭敬为盖宝栋周冬建周灿华刘金波金玉奇桑凤亭
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI