0.9-mu m laser device for double-end polarization pump

A pump light and laser technology, applied in the laser field in the field of laser technology, can solve the problems of low doping concentration of laser crystal, poor pump absorption, low optical efficiency, etc., so as to improve optical efficiency and internal efficiency. , Improve the effect of pump absorption

Inactive Publication Date: 2015-05-27
TIANJIN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a double-ended polarized pumped 0.9 μm laser, which solves the problems of low doping concentration and short length of the laser crystal in the Nd-doped vanadate 0.9 μm laser, resulting in poor pump absorption and low optical efficiency , see the description below:

Method used

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  • 0.9-mu m laser device for double-end polarization pump
  • 0.9-mu m laser device for double-end polarization pump

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Effect test

Embodiment 1

[0025] A double-ended polarization-pumped 0.9 μm laser, see figure 1 , including: 808nm laser diode pump source 1, energy transmission fiber 2, coupling lens 3 (including: first coupling lens 3-1, second coupling lens 3-2 and third coupling lens 3-3), polarization beam splitter prism 4. Pump light reflector 5 (comprising: first pump light reflector 5-1, second pump light reflector 5-2 and third pump light reflector 5-3), half-wave plate 6, Laser reflector 7, laser crystal 8, laser output mirror 9 and beam splitter 10.

[0026] Among them, the coupling lens 3, the polarization beam splitter prism 4, and the half-wave plate 6 are coated with pump light antireflection film, the pump light reflector 5 is coated with pump light high reflective film, and the laser reflector 7 and the beam splitter 10 are average Mirror, coated with pump light high-transparency, laser high-reflection film system, laser crystal 8 is neodymium-doped yttrium vanadate (Nd:YVO 4 ) crystal, coated with p...

Embodiment 2

[0036] A double-ended polarization-pumped 0.9 μm laser, see figure 2 , the difference from Embodiment 1 is that the placement direction of the laser crystal 8 is placed horizontally on the c-axis, so the horizontally polarized pump light emitted by the polarization beam splitter prism 4 is π-polarized relative to the laser crystal 8, and is focused by the second coupling lens 3-2 After entering the laser crystal 8; the half-wave plate 6 is arranged on the optical path of the vertically polarized pump light reflected by the polarization splitter prism 4, and its polarization direction is changed to horizontal polarization to realize double-ended π-polarized pumping of the laser crystal 8.

[0037] The rest of the operation process is the same as that of Embodiment 1, and will not be repeated here in this embodiment. During specific implementation, the implementation mode provided in Embodiment 1 or Embodiment 2 can be selected according to the requirements on the polarization ...

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Abstract

The invention discloses a 0.9-mu m laser device for a double-end polarization pump. A laser diode pump source emits pump light, the pump light is emitted by an energy-transmitting optical fiber and collimated into parallel light to enter a polarization splitting prism, the polarization splitting prism splits the unpolarized pump light in a horizontal polarization direction and a vertical polarization direction, the pump light in the horizontal polarization direction directly passes through the polarization splitting prism, and the pump light in the vertical polarization direction is reflected; the pump light which is in the horizontal polarization direction and directly passes through the polarization splitting prism is changed to be in the vertical polarization direction and then enters a laser crystal as pi-polarized light under the action of a half-wave plate arranged in any position between the polarization splitting prism and the laser crystal; the reflected pump light in the vertical polarization direction is focused by coupling lenses to pass through the pump laser beam as pi-polarized light; the laser crystal is subjected to population inversion under the effect of the pump, 914-nm laser oscillation is produced under the feedback effect of a laser device resonant cavity consisting of a laser reflection mirror and a laser outputting mirror, and 914-nm laser output is obtained through emission by a spectroscope after coupling and outputting by the laser outputting mirror.

Description

technical field [0001] The invention relates to the field of lasers in the technical field of lasers, in particular to a double-end polarization-pumped 0.9 μm laser. Background technique [0002] The laser with a wavelength near 0.9μm and the 450-460nm band laser obtained by its frequency doubling have a wide range of application backgrounds. Using neodymium (Nd 3+ ) vanadate laser working medium 4 f 3 / 2 → 4 I 9 / 2 Transition is the most commonly used method to generate laser light near 0.9 μm. It has significant advantages such as large stimulated emission cross-section and good polarization. Commonly used crystals include neodymium-doped yttrium vanadate (Nd:YVO 4 ), neodymium-doped gadolinium vanadate (Nd:GdVO 4 ), neodymium-doped lutetium vanadate (Nd:LuVO 4 )Wait. [0003] There is a significant defect in the Nd-doped vanadate 0.9μm laser that the laser working medium itself has a strong reabsorption effect on the 0.9μm laser, and the doping concentration of 0.5% ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/0941H01S3/16
Inventor 丁欣姜鹏波盛泉李斌孙冰刘简张巍赵岑姚建铨
Owner TIANJIN UNIV
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