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2.12 micron mode-locked laser

A mode-locked laser and laser gain technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of high technical requirements, low laser conversion efficiency, and high cost, and achieve small size, low cost, and stability. high sex effect

Inactive Publication Date: 2010-11-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is: the cost of obtaining the mode-locked laser equipment in the 2-micron band is high, the technical requirements are high, and the laser conversion efficiency is low. A 2-micron band lock with low cost, high laser conversion efficiency and easy implementation is needed mode laser

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  • 2.12 micron mode-locked laser
  • 2.12 micron mode-locked laser
  • 2.12 micron mode-locked laser

Examples

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Effect test

Embodiment 1

[0024] Such as figure 1 Make a 2.12 micron continuous mode-locked laser, the laser gain crystal 3 is Nd:YVO 4 , the parameters of each cavity mirror are: the input plane mirror M1 is a plane mirror with high reflection to 1.06 micron laser; the plano-concave mirror M2 is a plano-concave mirror with a radius of curvature of 500 mm; the plano-concave mirror M3 is a plano-concave mirror with a radius of curvature of 300 mm; Chromatic mirror M4 is a flat mirror with high reflection to 1.06 micron laser and 3% transmittance to 2.12 micron laser. The total length of the laser cavity is about 1.7 meters, and the distance between the input plane mirror M1 and the plano-concave mirror M2 is about 540 mm, the distance between the plano-concave mirror M2 and the plano-concave mirror M3 is about 950 mm, and the distance between the plano-concave mirror M3 and the dichroic mirror M4 is about 190 mm . Potential Phase Matched Crystal LiNbO 3 The length is 20 mm, and the phase-matched crys...

Embodiment 2

[0026] Such as figure 2 Make a 2.12 micron Q-switched mode-locked laser, including diode pump source 1, coupling system 2, input plane mirror M1, laser gain crystal 3, optical switch 4, plano-concave mirrors M2, M3, phase compensation sheet 5, group velocity loss Equipped with compensation sheet 6, quasi-phase matching crystal and crystal temperature control furnace 7 and dichroic mirror M4, the light source generated by diode pump source 1 passes through coupling system 2 and input plane mirror M1, pumps laser gain crystal 3, and is controlled by optical switch 4 Obtain Q-switched mode-locked pulses, plano-concave mirrors M2 and M3 compress the oscillating beam, phase compensation film 5 eliminates the influence of phase mismatch on pulse width and shape, and group velocity mismatch compensation film 6 eliminates the influence of group velocity dispersion on pulse width and shape The quasi-phase matching crystal and the crystal heating furnace 7 and the dichroic mirror M4 wo...

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Abstract

The invention discloses a 2.12 micron mode-locked laser, which comprises a diode pumping source, a coupling system, a laser gain crystal, a cavity mirror for highly reflecting 1.06 micron laser and a quasi-phase-matching crystal, wherein the cavity mirror forms a laser cavity of the laser, and a cavity mirror taken as an output end of the laser is a dichroic mirror; and 1.06 micron mode-locked laser oscillation is produced through the non-linear effect of the quasi-phase-matching crystal and the dichroic mirror, and 2.12 micron mode-locked laser is output. The mode-locked laser has no complicated and huge system, and has the characteristics of small volume, low cost, high efficiency, high stability, simplicity and easiness, and the conversion efficiency of the laser reaches 35 percent; andthe mode-locked laser overcomes the disadvantages and deficiency existing in the prior mode-locked laser device, and is a novel laser system.

Description

technical field [0001] The invention relates to a mode-locked laser, in particular to a mode-locked laser with a wavelength of 2 microns, which is a mode-locked laser with a wavelength of 2.12 microns. Background technique [0002] The all-solid-state laser in the 2 micron band is an ideal light source for laser rangefinders, coherent Doppler wind radars, and water vapor throwing surface differential absorption lidar systems. It is also a good surgical light source in medicine. Since the 1960s, especially the emergence of high-power semiconductor lasers, it has prompted people to conduct research on all-solid-state, miniaturized and stable 2-micron lasers. [0003] Due to the lack of suitable laser gain crystals, Q-switched 1.064 micron laser pump optical parametric oscillator is generally used to obtain 2 micron laser, but the obtained laser has the problems of small repetition frequency and large pulse width; in 2004, U.Keller group used Semiconductor Saturable Absorber M...

Claims

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Application Information

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IPC IPC(8): H01S3/108H01S3/098H01S3/16G02B5/20
Inventor 潘淑娣祝世宁
Owner NANJING UNIV
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