A Dual-Wavelength Laser Based on Stimulated Raman Scattering of Ethanol Water Solution

A technology of stimulated Raman scattering and dual-wavelength lasers, which is applied to lasers, laser components, and lasers using scattering effects, etc. It can solve problems such as limited application range, large laser wavelength interval, and limited optical frequency conversion crystal damage threshold.

Active Publication Date: 2020-10-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wavelength interval of the dual-wavelength laser generated by this method is relatively large, which limits its application range, and is limited by the damage threshold of the optical frequency conversion crystal, making it difficult to obtain high-energy laser pulses.
For example, domestic related technologies such as Chinese patent document CN101777724A disclose an end-pumped dual-wavelength coaxial switching output Q-switched base frequency and frequency-multiplication laser. This patent provides an end-pumped dual-wavelength coaxial switching output Q-switched base frequency, double frequency laser, while obtaining the output of fundamental frequency light and frequency doubled light, but the laser wavelength interval is relatively large

Method used

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  • A Dual-Wavelength Laser Based on Stimulated Raman Scattering of Ethanol Water Solution
  • A Dual-Wavelength Laser Based on Stimulated Raman Scattering of Ethanol Water Solution
  • A Dual-Wavelength Laser Based on Stimulated Raman Scattering of Ethanol Water Solution

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Effect test

Embodiment 1

[0065] A dual-wavelength laser based on stimulated Raman scattering of an aqueous ethanol solution, comprising a pump source 1, an aperture 2, a nonlinear crystal 3, a second color filter 4, a beam reduction system 5, and a first window arranged in sequence along the optical path The sheet 6, the Raman box 7, the second window 8, the first color filter 9, the first window 6, the Raman box 7, and the second window 8 are sealed and connected in sequence, and the Raman box 7 contains ethanol Aqueous solution. Such as figure 1 Shown.

[0066] The pump source 1 is a PY61 Nd:YAG mode-locked laser produced by Continuum, which outputs a laser with a wavelength of 1064nm, a pulse width of 40ps, and a repetition rate of 10Hz.

[0067] The diaphragm 2 is a baffle plate with a circular light hole with a diameter of 6 mm.

[0068] The nonlinear crystal 3 is a KTP frequency-doubled crystal with a wavelength of 532nm after frequency-doubling.

[0069] The second color filter 4 is plated with a die...

Embodiment 2

[0092] According to the two-wavelength laser based on stimulated Raman scattering of ethanol aqueous solution according to the first embodiment, the difference is that the beam reduction system 5 is removed and the lens 10 is replaced.

[0093] The lens 10 is a double-convex lens or a plano-convex lens to increase the power density of the pump light incident on the Raman medium.

[0094] The structural schematic diagram of the dual-wavelength laser described in embodiment 2 is as follows: Figure 7 Shown.

Embodiment 3

[0096] According to embodiment 1 of the dual-wavelength laser based on stimulated Raman scattering of ethanol aqueous solution, the difference is that the input mirror 11 is placed between the beam reduction system 5 and the first window 6, and the output is placed behind the second window 8. The mirror 12 forms the resonant cavity of the Raman laser.

[0097] The input mirror 11 is plated with a dielectric film that is highly transparent to 532nm laser and highly reflective to 600-700nm laser.

[0098] The output mirror 12 is plated with a dielectric film that is highly reflective to the 532nm laser and partially transparent to the 600-700nm laser.

[0099] In this embodiment, the output mirror 12 can achieve double-pass pumping for the 532nm laser with high reflection, which improves the output energy and conversion efficiency of the dual-wavelength laser.

[0100] The structure diagram of the dual-wavelength laser described in embodiment 3 is as follows: Figure 8 Shown.

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Abstract

The invention relates to a dual-wavelength laser based on stimulated Raman scattering of aqueous ethanol solution. The dual-wavelength laser comprises a pump source, a diaphragm, a first window, a Raman box, a second window and a first color filter which are sequentially placed along an optical path. The first window, the Raman box and the second window are sequentially sealed and connected, and the Raman box is filled with an ethanol aqueous solution. The pump source generates laser light, the laser light passes through the diaphragm, the first window, and is incident into the Raman box containing the ethanol aqueous solution. At the same time, ethanol and water respectively generate stimulated Raman laser to form a dual-wavelength stimulated Raman laser with frequency difference. The first color filter filters out the pump light and transmits the required dual-wavelength laser. The pump source and the working medium of the invention have a wide selection range and flexible wavelengthselection. The threshold for resistance to light damage is high. The laser diameter and medium length are flexible. The cost is low, the dual-wavelength laser is easy to produce, is simple to debug,is wide in application range, can be used for fine laser spectroscopy, differential absorption laser radars, laser communication, environmental detection, fiber optic communication, nonlinear opticalfrequency conversion, etc.

Description

Technical field [0001] The invention relates to a dual-wavelength laser based on stimulated Raman scattering of an aqueous ethanol solution, belonging to the technical field of lasers. Background technique [0002] As an important laser technology, dual-wavelength laser can be widely used in fine laser spectroscopy, differential absorption lidar, laser communication, environmental detection, laser medical treatment, optical fiber communication, nonlinear optical frequency conversion, etc. Dual-wavelength lasers have been a research hotspot in the laser field in recent years. People are racing to develop dual-wavelength lasers with new wavelengths and new generation mechanisms. [0003] Currently, dual-wavelength lasers mainly use solid crystals as laser working materials. The main production methods are: (1) The dual emission line method based on the two emission peaks of the laser crystal emission spectrum to achieve dual-wavelength laser output. This method generates dual-wavele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/30
CPCH01S3/307
Inventor 王正平吴志心许心光孙洵顾庆天徐明霞张立松
Owner SHANDONG UNIV
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