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Tunable chrysoberyl laser pumped by Raman yellow light

A technology of chrysoberyl and lasers, which is applied to lasers, laser components, phonon exciters, etc., can solve problems such as severe thermal load of lasers, quantum loss of pump light and output light, and influence on beam quality and output characteristics, etc., to achieve Small quantum loss, low cost, and improved output performance

Active Publication Date: 2019-02-22
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the absorption band of chrysoberyl covers the entire visible light band, the crystal can be pumped by common visible light lasers such as 488nm argon ion laser, copper vapor laser and 532nm green laser. There is a large quantum deficit between the pump light and the output light, which makes the thermal load of the laser more serious, thus affecting the output characteristics such as beam quality

Method used

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  • Tunable chrysoberyl laser pumped by Raman yellow light
  • Tunable chrysoberyl laser pumped by Raman yellow light

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Embodiment 1

[0028] Chrysoberyl (Cr 3+ :BeAl 2 o 4 ) crystal is a kind of laser material with excellent performance. In the study of its absorption spectrum, it is found that the three major axis directions of the crystal have large absorption cross sections in the yellow light band, especially in the E / / b axis. In the direction, there is a strong broad absorption peak centered at 590nm. Therefore, whether it is pumped by polarized light or non-polarized light, pumping chrysoberyl crystals with yellow light can achieve sufficient absorption of pump light. Compared with the previous pumping method of the chrysoberyl laser, it is proposed to use Raman yellow light as the pumping source of the tunable chrysoberyl laser, which is not only low in cost, but also can be realized because it can be aligned with the absorption peak of the chrysoberyl crystal High optical efficiency and small quantum deficit between pump light and output light can improve the output performance of chrysoberyl lase...

Embodiment 2

[0036] The laser gain medium in Embodiment 2 of the present invention adopts a self-Raman crystal, so the Raman crystal can be omitted in the device, and the dispersion prism is selected as the tuning element of the chrysoberyl laser at the same time. The specific structural diagram is as follows figure 2 shown.

[0037] 808nm or 880nm laser diode pumping source 1 emits pump light, which is transmitted through the energy transmission fiber 2 and focused by the coupling lens group 3 to pump the laser gain medium 5; the laser gain medium 5 adopts a-cut Nd:YVO 4 Crystal, the crystal size is 3×3×10mm 3 , the doping concentration is selected to be 0.3at.%; both ends of the laser gain medium 5 are polished, coated with 1064nm fundamental frequency light and 1176nm first-order Stokes Raman light anti-reflection coating, wrapped with indium sheet and placed in a heat sink, using cooling The circulating water system controls the working temperature. The resonator mirror 4 is a flat ...

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Abstract

The present invention relates to the technical field of all-solid-state laser, and provides a tunable chrysoberyl laser that is low-cost and has high optical efficiency. A Raman yellow pumped tunable chrysoberyl laser comprises a laser diode, an energy transmission optical fiber, a coupling lens group, a resonance cavity reflector, a laser gain medium, a Raman crystal, a harmonic tablet, a frequency-doubling crystal, a yellow output lens, a focusing lens, an chrysoberyl crystal, an chrysoberyl laser all mirror, a tuning element and an chrysoberyl laser output lens. The laser diode as a pumping source gives out a laser gain medium to absorb pumping light in a strip, the laser gain medium is transmitted by the energy transmission optical fiber and is focused by the coupling lens group and then is pumped; and the number of particles is reversed in the laser gain medium, and as the pumping power increases, fundamental frequency light is generated under the action of feedback of a resonance cavity consisting of the resonance cavity reflector and the yellow output lens. The Raman yellow pumped tunable chrysoberyl laser is mainly applied to design and manufacture of lasers.

Description

technical field [0001] The invention relates to the technical field of all solid-state lasers, in particular to a tunable chrysoberyl laser pumped by Raman yellow light. Background technique [0002] Chrysoberyl (Cr 3+ :BeAl 2 o 4 ) is a laser material with excellent performance of high power and wide tuning. Due to its tunability, high gain and excellent temperature characteristics, chrysoberyl lasers have been widely valued since they appeared. Its basic output spectrum ranges from 700-850nm in the visible light to near-infrared band, and can be widely used in many cutting-edge research fields such as space remote sensing, medical treatment, optical storage, spectroscopy and nonlinear optics. [0003] There are many methods for pumping chrysoberyl crystals, because chrysoberyl has a wide absorption band and can absorb pump light at 400-700nm. At present, the commonly used pumping methods mainly include: 1. Flash lamp pumping. Industrial processing and commercializatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/094H01S3/30
CPCH01S3/094H01S3/30
Inventor 丁欣刘简盛泉李斌孙冰姜鹏波赵岑姚建铨
Owner TIANJIN UNIV