A wavelength tunable nonlinear mirror mode-locked laser and its working method

A mode-locked laser and nonlinear technology, applied in the field of lasers, can solve the problems of low output power, complex preparation, and low damage threshold of tunable ultrafast lasers, and achieve the effect of good mode-locking stability and high damage resistance threshold

Active Publication Date: 2021-01-08
SHANDONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the deficiencies of the prior art, the present disclosure provides a wavelength tunable nonlinear mirror mode-locked laser and its working method, which solves the problems of low damage threshold, low output power and complicated preparation of current tunable ultrafast lasers

Method used

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  • A wavelength tunable nonlinear mirror mode-locked laser and its working method
  • A wavelength tunable nonlinear mirror mode-locked laser and its working method
  • A wavelength tunable nonlinear mirror mode-locked laser and its working method

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Embodiment 1

[0042] Such as figure 1 As shown, Embodiment 1 of the present disclosure provides a wavelength tunable nonlinear mirror mode-locked laser, including a pumping light source 1. The pumping light source 1 is focused after being passed through a collimating and focusing system 2, and then enters an optical resonant cavity after focusing. The optical resonant A laser crystal 7, a birefringence filter 9 and a nonlinear crystal 8 are sequentially arranged in the cavity.

[0043] The pumping light source 1 is a continuous or quasi-continuous light source, preferably a 976nm diode laser.

[0044]The beam resonant cavity is a Z-type resonant cavity including an input mirror, two reflectors and an output mirror, and the two reflectors are respectively a first reflector 4 and a second reflector 5, and the first reflector 4 and the second reflector Reflectors 5 are arranged at the corners of the Z-shaped resonant cavity respectively, and the first reflector 4 is used to receive the input ...

Embodiment 2

[0064] Such as Figure 6 As shown, Embodiment 2 of the present disclosure provides a working method of a wavelength tunable nonlinear mirror mode-locked laser;

[0065] A working method of a wavelength tunable nonlinear mirror mode-locked laser, using the wavelength tunable nonlinear mirror mode-locked laser described in Embodiment 1 of the present disclosure, the steps are as follows:

[0066] The pump light source sends a collimated beam to the optical resonant cavity through a collimating focusing system;

[0067] The laser first works in the continuous wave state, and the birefringent nonlinear crystal changes the angle or the optical superlattice changes the period or temperature to match the phase of the frequency doubling process and realize the mode-locked laser output;

[0068] The laser output wavelength is changed by changing the angle of the birefringence filter.

[0069] The input mirror has high transmittance to 976nm light, high reflectivity to 1020nm-1080nm l...

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Abstract

The invention provides a wavelength tunable nonlinear mirror mode-locked laser and a working method. The mode-locked laser comprises a pump light source, a collimation focusing system and an optical resonant cavity, wherein a laser crystal, a birefringence filter and a nonlinear crystal are sequentially arranged in the optical resonant cavity, the laser output wavelength is changed by rotating theangle of the birefringence filter, the phase of the frequency multiplication process is matched by adjusting the nonlinear crystal, and mode-locked laser output is achieved. The problems that an existing tunable ultrafast laser is low in damage threshold value, low in output power and complex in preparation are solved, and high-power wavelength-tunable ultrafast laser output can be obtained.

Description

technical field [0001] The disclosure relates to the technical field of lasers, in particular to a wavelength-tunable nonlinear mirror mode-locked laser and a working method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Wavelength tunable ultrafast lasers have been widely used in spectroscopy, biomedicine, and communication fields due to their simplified structure and high integration. At present, the main technology for generating wavelength-tunable ultrafast lasers is passive mode-locking technology based on semiconductor saturable absorber mirror (Semiconductor Saturable Absorber Mirror, SESAM), graphene, and carbon nanotubes. However, SESAM has a narrow tuning range, low damage threshold and complex fabrication process. The working wavelength of carbon nanotube mode-locking is determined by the tube diameter, and tunable laser c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/098H01S3/109
CPCH01S3/109H01S3/1112
Inventor 赵丽娜高垣梅蓝若明马红蔡阳健
Owner SHANDONG NORMAL UNIV
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