Raman laser capable of realizing precise wavelength tuning through temperature control

A Raman laser and temperature controller technology, applied in the field of lasers, can solve problems such as inability to generate wavelengths and single output wavelength, and achieve the effects of low cost, simple structure, and improved light conversion efficiency

Pending Publication Date: 2022-04-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Laser is a special light source, which has monochromaticity (single output wavelength), but currently a single type of laser cannot produce all wavelengths. The wavelength is converted, and the required wavelength is generated through the conversion of the wavelength

Method used

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  • Raman laser capable of realizing precise wavelength tuning through temperature control
  • Raman laser capable of realizing precise wavelength tuning through temperature control
  • Raman laser capable of realizing precise wavelength tuning through temperature control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, a Raman laser whose output wavelength is finely tuned by gas temperature adjustment produces first-order Stokes lasing. A solid-state Nd:YAG laser with an output wavelength of 1064nm is used to pump methane to generate a Raman laser that can be finely tuned at around 1543nm.

[0043] According to the attached figure 1 , the working process of the Raman laser is as follows:

[0044] The first step: the pump laser is focused and input into the Raman cell;

[0045] Step 2: The temperature of the methane gas in the Raman cell can be adjusted through the temperature control module;

[0046] Step 3: Use a wavelength meter to detect the output Raman laser, and set a reasonable methane gas temperature according to the wavelength.

[0047] For example: the density of methane is 0.15g / cm 3 The corresponding relationship between temperature and Raman frequency shift is shown in the table below

[0048]

[0049]

Embodiment 2

[0051] IPG's commercialized fiber laser is used as the pump laser source with a wavelength of 1070nm. figure 2 The design scheme can focus and collect the IPG fiber laser into the hollow-core photonic crystal fiber, fill the Raman cell with high-purity methane, convert the 1070nm wavelength laser to 2840nm, and then realize the Raman by adjusting the temperature of the methane gas. The Mann wavelength is finely tuned around 2840nm. For example, when the temperature range is -100-300°C, the tuning of the Raman laser wavelength at about 2831-2849nm can be realized.

Embodiment 3

[0053] according to figure 2 The design scheme, the hollow-core photonic crystal fiber is added to the Raman cell to reduce the threshold of stimulated Raman and achieve high-efficiency conversion of the pump laser.

[0054] The implementation process of this scheme can be as follows: use the 532nm laser as the pump laser, fill the Raman cell with high-purity nitrogen gas, collect the 532nm pump laser into the hollow-core photonic crystal fiber through the focusing lens, and pass the gas The temperature control can realize the fine tuning of the Raman laser wavelength around 607nm. For example, when the temperature range is -100-100°C, the Raman laser wavelength can be tuned around 602-610nm.

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Abstract

The invention provides a Raman laser capable of realizing fine tuning of output wavelength through gas temperature adjustment, and the Raman laser comprises a pump laser used for outputting pump laser with parallel light beams; the wavelength converter is used for converting the pumping laser into Raman laser to be output, and the wavelength converter is filled with Raman active gas; the focusing lens is used for focusing the pumping laser into the wavelength converter; the temperature control module is used for controlling the temperature of the wavelength converter; and the air pressure adjusting device is used for controlling the density of the Raman active gas in the wavelength converter. The Raman laser provided by the invention can realize precise tuning of the output wavelength of Raman laser through temperature.

Description

technical field [0001] The invention belongs to the field of lasers, and in particular relates to a Raman laser capable of precise wavelength tuning through temperature control. [0002] technical background [0003] Laser is a special light source, which has monochromaticity (single output wavelength), but currently a single type of laser cannot produce all wavelengths. The wavelength is converted, and the required wavelength is generated through the conversion of the wavelength. [0004] Stimulated Raman is an important laser frequency conversion method. A lot of research and application have been done on stimulated Raman laser frequency conversion technology at home and abroad. The large-scale adjustment of Raman frequency conversion is usually more than hundreds of wavenumbers. For example, the vibration Raman frequency shift of gas can reach thousands of wavenumbers, and the rotational Raman frequency shift has at least hundreds of wavenumbers. Crystal Raman frequency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/102H01S3/104H01S3/30
Inventor 蔡向龙郭敬为李仲慧沈陈诚郑天成刘金波
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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