Laser output method for Kerr mode-locked ytterbium-doped lanthanum gadolinium silicate crystal

A technology of gadolinium ytterbium silicate and output method, which is applied in the field of functional crystal material preparation, can solve the problems of bulky volume, high maintenance cost, limited development and application, etc., and achieves the effect of short pulse laser output and wide emission spectral bandwidth.

Inactive Publication Date: 2020-08-28
MAANSHAN HUAYU ENVIRONMENTAL PROTECTION EQUIP MFG
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] At present, the commercialized femtosecond lasers are mainly mode-locked Ti:sapphire lasers, but because the absorption peak of Ti:sapphire crystals is in the visible band, it cannot be directly pumped by LD, and generally only argon ion lasers (wavelength 515nm) or Nd 3+ The green light (532nm) obtained by doping solid-state laser frequency doubling is used as the pump source, resulting in complex structure, bulky volume and high maintenance cost of the laser, which limits its development and application

Method used

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  • Laser output method for Kerr mode-locked ytterbium-doped lanthanum gadolinium silicate crystal
  • Laser output method for Kerr mode-locked ytterbium-doped lanthanum gadolinium silicate crystal
  • Laser output method for Kerr mode-locked ytterbium-doped lanthanum gadolinium silicate crystal

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Embodiment 1

[0038] A kind of laser output method that is used for Kerr mode-locking ytterbium-doped gadolinium lanthanum silicate crystal of this embodiment, such as Figure 1-2 shown, including the following steps:

[0039] Step 1. Pump 1 emits pump light source 11: pump 1 outputs pump light source 11 horizontally. According to Yb:GLSO crystal 5, it has strong absorption bands at 940nm and 970nm, so it is possible to use mature 940nm or 970nm semiconductors. The laser emits a pumping light source 11 as a pumping 1, and the Yb: GLSO crystal 5 effectively absorbs the energy of the pumping light source and transmits it to the focusing lens 3 through a fiber coupler 2;

[0040] Step 2. Focusing by focusing lens 3: focus the pumping light source 11 into a focused light source 31 through several groups of focusing lenses 3 arranged continuously, and focus on the end face 51 of the Yb:GLSO crystal 5, and the focused light source 31 starts from the Yb : The right end face of GLSO crystal 5 pene...

Embodiment 2

[0046] A kind of laser output method that is used for Kerr mode-locking ytterbium-doped gadolinium lanthanum silicate crystal of this embodiment, the basic structure is the same as that of embodiment 1, and the differences and improvements are as follows: Figure 4 As shown, after the Yb:GLSO crystal effectively absorbs the energy of the pump light source, it passes 2 f 7 / 2 → 2 f 5 / 2 energy level transition, the Yb 3+ The particles in the ground state are pumped into the 2 f 5 / 2 energy level, then 2 f 5 / 2 The particles at the energy level relax to 2 f 5 / 2 On the lowest Stark sub-energy level, the number of particles is reversed, thus realizing 2 f 5 / 2 arrive 2 f 7 / 2 The stimulated transition of the Yb:GLSO crystal 5 produces a 1.03-micron near-infrared laser, and realizes femtosecond pulse laser output by mode-locking; the right side of the Yb:GLSO crystal 5 is also provided with a concave mirror I41 at the position corresponding to the concave mirror II42, and the...

Embodiment 3

[0048] A kind of laser output method that is used for Kerr mode-locking ytterbium-doped gadolinium lanthanum silicate crystal of this embodiment, the basic structure is the same as that of embodiment 2, and the differences and improvements are as follows: Figure 1-2 As shown, the Yb:GLSO crystal 5 was wrapped with indium foil in advance, and fixed on the copper water-cooled heat sink, and the temperature of the water-cooled heat sink was stabilized at about 16°C by active control, and then the Yb:GLSO The crystal 5 is placed in the laser output device at the Brewster angle to reduce the adverse effect of waste heat on the laser oscillation; the Yb:GLSO crystal 5 includes left and right end faces 51, and surrounding sides 52, such as image 3 As shown, the left and right end surfaces 51 of the Yb:GLSO crystal 5 are polished to have a high surface finish, and a good parallelism between the two end surfaces 51 is maintained; The right end face of the crystal 5 is focused into a ...

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Abstract

The invention discloses a laser output method for a Kerr mode-locked ytterbium-doped lanthanum gadolinium silicate crystal, and belongs to the technical field of functional crystal material preparation. The laser output method for a Kerr mode-locked ytterbium-doped lanthanum gadolinium silicate crystal comprises the steps of taking the Yb: GLSO crystal as a femtosecond laser medium, adopting a pump to emit a pump light source with a central wavelength in a corresponding interval range, focusing the pump light source to the end surface of the Yb: GLSO crystal through an optical fiber coupler and a focusing lens, and then transmitting through the Yb: GLSO crystal to be emitted to a concave mirror II; enabling the laser input to the surface of the Yb: GLSO crystal to be combined with a concave mirror I and the concave mirror II to form an X-shaped optical resonant cavity, and when oscillating laser in the resonant cavity meets laser implementation conditions such as particle beam inversion, outputting the oscillating laser from a laser output coupling mirror. Compared with the traditional Yb: YAG crystal, the Yb: GLSO crystal adopted by the invention is easier to realize femtosecond laser output by means of pumping.

Description

technical field [0001] The invention relates to the technical field of preparation of functional crystal materials, in particular to a laser output method for Kerr mode-locking ytterbium-doped gadolinium-lanthanum silicate crystals. Background technique [0002] In recent years, with the birth and development of a series of revolutionary technologies such as chirped pulse amplification technology (which won the 2018 Nobel Prize in Physics), mode-locking technology, laser Q-switching technology, and LD (laser diode) technology, all-solid-state flying The limit of the second laser pulse width is constantly being broken through, the peak power of the laser pulse is constantly being increased, and the volume, stability, and laser efficiency of the femtosecond laser have been significantly improved, making the femtosecond laser technology an important part of current optics and even physics and information technology. One of the most active research fronts and key areas of compet...

Claims

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Application Information

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IPC IPC(8): H01S3/06H01S3/08H01S3/081H01S3/094H01S3/102H01S3/11H01S3/16
CPCH01S3/0602H01S3/1618H01S3/1655H01S3/094H01S3/08059H01S3/0811H01S3/0815H01S3/1106H01S3/102
Inventor 孙艳秋权岚俞海云
Owner MAANSHAN HUAYU ENVIRONMENTAL PROTECTION EQUIP MFG
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