Self mode-locked laser of nonlinear mirror

A self-mode-locking and laser technology, which is applied to lasers, laser components, phonon exciters, etc., to achieve power output, high output power, and high stability

Inactive Publication Date: 2012-07-25
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This brings a lot of inconvenience to the actual operation, for example: when realizing the nonlinear mode-locked laser output, the position and angle of the laser crystal and the nonlinear crystal need to be optimized to match

Method used

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  • Self mode-locked laser of nonlinear mirror
  • Self mode-locked laser of nonlinear mirror
  • Self mode-locked laser of nonlinear mirror

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment utilizes a piece of neodymium-doped calcium borate yttrium oxide Nd:YCa 4 O(BO 3 ) 3 As a self-frequency doubling crystal 5; where, Nd 3+ The ion doping concentration is 0.1 at. The self-frequency doubling crystal 5 is processed into a rectangle along the frequency doubling phase matching direction (ie, θ=113°, φ=36.5°). The rectangular crystal has a length of 25 mm, a cross-sectional size of 5 mm×5 mm, and a thickness of 0.1 mm. The two ends of the rectangular crystal are light-passing planes, and the two light-passing planes are parallel to each other.

[0044] The input mirror 4 and the output mirror 7 of the resonator mirror of the present embodiment are respectively made on two light-passing planes of the self-frequency doubling crystal, and the two light-passing planes are optically polished, wherein one pass of the self-frequency doubling crystal The optical plane is plated as the input mirror 4 for the dielectric film with high transparency o...

Embodiment 2

[0048] A semiconductor laser diode with an emission wavelength of 812nm is used as the pump source 1, and a Nd:YCOB self-frequency doubling crystal 5 is used as the laser working medium and the frequency doubling crystal, such as figure 1 The cavity structure shown makes the nonlinear mirror self-mode-locked laser of the present invention.

[0049] The green self-mode-locked laser of this embodiment includes: a laser diode pump source 1, a Nd:YCOB self-frequency doubling crystal 5, an LD optical coupling component 2, a focusing system 3 and a resonant cavity mirror, and the resonant cavity mirror of this embodiment consists of An independent input mirror 4, reflection mirror 6 and output mirror 7 are composed; wherein, the LD optical coupling component 2 and the focusing system 3 are sequentially arranged on the optical path between the pump source 1 and the input mirror 4, and the input mirror 4 and the A self-frequency doubling crystal 5 is arranged between the reflectors 6,...

Embodiment 3

[0052] Embodiment 3: structure as described in embodiment 2, difference is to use Nd 3+ The Nd:YCOB self-frequency doubling crystal 5 with an ion doping concentration of 0.25 at., the self-frequency doubling crystal 5 is processed into a cylindrical shape, its processing angle is θ=148°, φ=0°, the crystal diameter is 6mm, and the length is 50mm. The surface of the output mirror 7 facing the inside of the resonant cavity is coated with a dielectric film with a high reflection rate of 0.525-0.55 μm and a reflectivity of 99% for 1.05-1.1 μm.

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Abstract

The invention relates to a self mode-locked laser of a nonlinear mirror, which comprises a pumping source, a resonant cavity mirror, and a laser self frequency doubling crystal, wherein the laser self frequency doubling crystal is processed into a rectangular body or a columnar body along the frequency doubling phase matching direction, two end faces of the laser self frequency doubling crystal are light-transmission planes and are mutually parallel; one light-transmission plane of the laser self frequency doubling crystal is used as an input mirror by being plated with a dielectric film capable of highly making pump light pass and highly reflecting fundamental frequency light and frequency doubling light, and the other light-transmission plane is used as an output mirror by being plated with a dielectric film capable of making part of fundamental frequency light pass and highly reflecting the frequency doubling light. The self mode-locked laser of the nonlinear mirror adopts an end face pumping mode that: the self frequency doubling crystal is arranged before the output light of the pumping source, and the end surface of the self frequency doubling crystal, which is plated with the output mirror, is arranged opposite to the output light of the pumping source; and the self mode-locked laser of the nonlinear mirror adopts a lateral pumping mode that: the pumping source is arranged at the lateral surface of the self frequency doubling crystal. The laser realizes fundamental frequency light production and second harmonic process by one self frequency doubling crystal, and hascharacteristics of simple operation, reliable performance, high output power, high stability, and the like.

Description

technical field [0001] The invention relates to a non-linear mirror self-mode-locking device, in particular to a non-linear mirror self-mode-locking laser based on a self-frequency doubling laser crystal. Background technique [0002] Due to the characteristics of narrow pulse width (picosecond or even femtosecond level) and high peak power, mode-locked lasers have been widely used in the research of strong-field photophysics and transient physical processes, and have derived the generation of high-order harmonics, A series of high-tech technologies such as laser plasma, laser nuclear fusion (or fission), cosmological simulation, laser processing, femtosecond time-resolved spectroscopy, femtosecond chemistry, and femtosecond biology have become powerful tools for scientific exploration. [0003] The generation of mode-locked laser needs to adjust its loss in the laser cavity, and the adjustment methods include active and passive. Among them, the passive mode-locked laser is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/098H01S3/109H01S3/091
Inventor 王继扬张怀金于浩海王正平蒋民华许祖彦宗楠李芳琴彭钦军
Owner SHANDONG UNIV
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