Dual-wavelength laser based on dual-simulated Raman scattering media

A dual-wavelength laser and stimulated Raman scattering technology, which is applied in the direction of laser light using scattering effects, can solve the problems of difficult control of the mutual ratio of stimulated Raman lasers, limited application range, and large wavelength intervals, so as to avoid mode competition, Adjustable wavelength interval and high peak power effect

Inactive Publication Date: 2016-01-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the frequency interval of each wavelength is fixed, and the wavelength interval is relatively large, which limits its application range.
For example, laser-pumped BaWO with a wavelength of 532nm 4 The wavelength interval of the first-order and second-order Stokes light generated by the crystal is about 30nm, and the mutual ratio of each order of stimulated Raman laser light is difficult to control, which affects its practical application

Method used

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  • Dual-wavelength laser based on dual-simulated Raman scattering media
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  • Dual-wavelength laser based on dual-simulated Raman scattering media

Examples

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Effect test

Embodiment 1

[0043] A dual-wavelength laser based on double-stimulated Raman scattering media, including a pump source (1), a first aperture (2), a beam reduction system (3), and a second aperture (4) arranged in sequence along the optical path , a first attenuation system (6), a first color filter (14), the dual-wavelength laser also includes a Raman medium I (8) and a Raman medium II (12) with different Raman frequency shifts, the The first color filter (14) is arranged behind the Raman medium I (8) and the Raman medium II (12).

[0044] The dual-wavelength laser also includes a beam splitter (5), an optical path delay system (7), a beam combiner (9), a first mirror (10), a second attenuation system (11), a second mirror (13 ), the beam splitter (5) is arranged between the second aperture (4) and the first attenuation system (6), and the laser beam is divided into the first optical path by the beam splitter (5) and the second light path exits. Place the first attenuation system (6), th...

Embodiment 2

[0061] A dual-wavelength laser based on a dual-stimulated Raman scattering medium according to embodiment 1, the difference is that the dual-wavelength laser also includes a nonlinear crystal (15) and a second color filter (16), the The first aperture (2), the nonlinear crystal (15), the second color filter (16), and the beam shrinking system (3) are sequentially arranged along the optical path.

[0062] Both the first reflection mirror (10) and the second reflection mirror (13) are planar reflection mirrors with high reflection to light with a wavelength of 500-700nm.

[0063] The first color filter (14) is coated with a dielectric film that is highly reflective to 532nm wavelength laser and highly transparent to the stimulated Raman laser band (550-700nm).

[0064] The nonlinear crystal (15) is a KTP frequency doubling crystal, the wavelength after frequency doubling is 532nm, and the pulse width is 30ps.

[0065] The second color filter (16) is coated with a dielectric fil...

Embodiment 3

[0070] According to the dual-wavelength laser based on the double-stimulated Raman scattering medium described in Embodiment 2, the difference is that the first optical path delay system (7) and the Raman medium I (8) are placed The input mirror (17), the first output mirror (18) is placed between the Raman medium I (8) and the beam combiner (9), the second attenuation system (11) and the The second input mirror (19) is placed between the Raman medium II (12), and the second output mirror (20) is placed between the Raman medium II (12) and the second reflection mirror (13). .

[0071] The first input mirror (17) is coated with a dielectric film with high transparency to 532nm laser and high reflection to 558.4nm laser.

[0072] The first output mirror (18) is coated with a dielectric film that is highly reflective to 532nm laser and partially transparent to 558.4nm laser.

[0073] The second input mirror (19) is coated with a dielectric film with high transparency to 532nm l...

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Abstract

The invention relates to a dual-wavelength laser based on dual-simulated Raman scattering media. The dual-wavelength laser comprises a pumped source, a first diaphragm, a beam compressing system, a second diaphragm and a first attenuation system which are successively arranged along an optical path. The dual-wavelength laser further comprises a Raman medium I, a Raman medium II and a first filtering sheet which are different in Raman displacement. A pumped laser or frequency-converted light thereof is split and then is emitted to the simulated Raman scattering media arranged in parallel or is emitted to the serially-arranged simulated Raman scattering media in sequence, so that a dual-wavelength laser is output. A plurality of selections are available to the pumped light of the Raman media, the Raman media can be freely selected and combined, and a plurality of kinds of dual-wavelength lasers can be obtained. The dual-wavelength laser is simple in structure, high in stability and large in output energy, so that the dual-wavelength laser has a great application value in the fields of laser range finding, laser communication, difference absorption laser radars, laser medicine, fine laser spectrums, terahertz wave generation by a difference frequency method and the like.

Description

technical field [0001] The invention relates to a dual-wavelength laser based on a double-stimulated Raman scattering medium, which belongs to the field of laser technology. Background technique [0002] Dual-wavelength lasers have important application value in the fields of photoelectric countermeasures, long-range laser ranging, laser communication, differential absorption lidar, laser medical treatment, fine laser spectroscopy, and laser display. In particular, using the nonlinear optical properties of crystals to perform frequency conversions such as sum frequency and difference frequency at the back end of the dual-wavelength laser can obtain more wavelength lasers, greatly enriching the laser light source. In recent years, the use of the difference frequency of dual-wavelength lasers to generate coherent terahertz waves has attracted widespread attention at home and abroad. Its advantages are low threshold, compact structure, and high power terahertz radiation. It is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/30
Inventor 王正平吴志心许心光张芳刘彦庆
Owner SHANDONG UNIV
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