Optical parameter conversion device for realizing ultra-wide spectrum laser output

An optical parameter, conversion device technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of narrow output spectral range, high use cost, inability to meet, etc., to improve system integration and reduce system complexity degree and cost, the effect of reducing the number of optical components

Active Publication Date: 2021-02-26
武汉光谷航天三江激光产业技术研究院有限公司
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Problems solved by technology

The existing optical parameter conversion technology can only realize the output of two laser beams with different wavelengths, and the output spectral range is narrow, which cannot meet the demand for wide spectral range laser output such as photoelectric countermeasures
The traditional solution is to synthesize lasers with different output wavelengths output by multi-channel optical parameter converters through spectral synthesis, spatial synthesis, etc. to achieve wide-band laser output, but multi-channel optical parameter converters need to be established, and the cost of use is relatively high. High, the system is more complex

Method used

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  • Optical parameter conversion device for realizing ultra-wide spectrum laser output
  • Optical parameter conversion device for realizing ultra-wide spectrum laser output
  • Optical parameter conversion device for realizing ultra-wide spectrum laser output

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Embodiment 1

[0029] see figure 1 , an optical parameter conversion device for realizing ultra-wideband laser output according to the present invention, comprising n lasers with different wavelengths, a spectrum synthesis element, and an optical parameter converter;

[0030] The n different wavelength lasers are arranged in the order of wavelength, and the emitted laser light is incident on the spectrum synthesis element at the same time to form a wide spectral range spectrum synthesis laser output; the output lasers of the n different wavelength lasers are all linearly polarized lasers, n≥2, the output mode is continuous laser.

[0031] After the spectrally synthesized laser is output, it enters the optical parameter converter, and through the nonlinear optical action of the optical parameter converter, an optical parameter laser output with a wide spectral range is formed;

[0032] The optical parameter converter sequentially includes a laser input mirror, a nonlinear crystal and a laser...

Embodiment 2

[0034] see figure 2 , the first pulsed fiber laser, the second pulsed fiber laser, and the third pulsed fiber laser output laser center wavelengths are 1060nm, 1080nm, 1100nm respectively, the 3dB line width is 0.3nm, the average output power of each laser is 10W, and the pulse repetition frequency is 10kHz , the pulse width is 100ns, the beam quality is close to the diffraction limit, the output beam is parallel collimated output, and the spot radius is 2mm. The size of the diffraction grating is 10mm×10mm, and the groove density is 1200 grooves per millimeter. Each laser beam is calculated according to the grating diffraction formula, and is incident on the diffraction grating at angles of 45.46°, 47.46°, and 49.54° to the normal line of the grating, and is reflected by the diffraction grating to form a spectrally synthesized laser output. The spectrally synthesized laser and the normal line of the diffraction grating The included angle is 34°.

[0035] After the spectral...

Embodiment 3

[0037] see image 3, the center wavelengths of the first sub-beam, the first sub-beam and the third pulse are 2110nm, 2090nm, 2070nm respectively, the 3dB line width is 2nm, the average output power of each laser is 10W, the pulse repetition frequency is 10kHz, and the pulse width is 100ns, the beam quality is close to the diffraction limit, the output beam is parallel collimated output, and the spot radius is 2mm. The first reflecting mirror and the second reflecting mirror are coated with a 2060nm-2120nm high-reflection film, and the reflectivity of the 2060nm-2120nm is greater than 99%, and they are placed at an angle of 45° to the incident light beam. The first dichroic mirror is coated with 2108nm-2120nm high-reflection coating and 2080nm-2092nm anti-reflection coating. The reflectivity for 2108nm-2120nm is greater than 99%, and the transmittance for 2080nm-2092nm is greater than 97%. It is placed at an angle of 45° to the incident beam. The second dichroic mirror is coa...

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Abstract

The invention discloses an optical parameter conversion device for realizing ultra-wide spectrum laser output. The optical parameter conversion device comprises n laser devices with different wavelengths, a spectrum synthesis element and an optical parameter converter, wherein the n laser devices with different wavelengths are arranged according to the sequence of wavelengths, emitted laser is incident to the spectrum synthesis element at the same time to form a wide-spectrum-range spectrum synthesis laser output, the spectrum synthesis laser is output and then enters the optical parameter converter, optical parameter laser output with a wide spectrum range is formed through the nonlinear optical effect of the optical parameter converter, and the optical parameter converter sequentially comprises a laser input mirror, a nonlinear crystal and a laser output mirror along the direction of an incident light path. Compared with the prior art, the optical parameter conversion device of the invention has the following characteristics that wide-spectrum-range laser output is achieved only through a single optical parameter converter, the number of optical elements used in a traditional scheme is greatly reduced, the system complexity and cost are effectively reduced, the system integration degree is improved, and good output performance calibration and amplification capacity is achieved.

Description

technical field [0001] The invention relates to an optical parameter conversion device, which is mainly used to realize ultra-wide-range laser output in ultraviolet, visible light, infrared and other wave bands, and is suitable for application in the field of high-power lasers, especially an optical parameter for realizing ultra-wide-band laser output Conversion device. Background technique [0002] Optical parameter conversion technology is one of the most widely used technical means since the development of nonlinear optical technology, which belongs to the second-order nonlinear effect. The optical parameter conversion technology converts the input single beam of laser light into two beams of other wavelength laser output, which can realize the laser output of special bands that cannot be realized by traditional lasers, and is widely used in the mid-infrared, long-wave infrared and even terahertz bands. The existing optical parameter conversion technology can only realiz...

Claims

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Application Information

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IPC IPC(8): H01S3/00H01S3/13
CPCH01S3/0092H01S3/0071H01S3/0085H01S3/13
Inventor 韩鎏张甦武春风李强姜永亮刘厚康宋祥胡舒武董程何苗
Owner 武汉光谷航天三江激光产业技术研究院有限公司
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