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High-beam-quality Ho laser

A laser and high-beam technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of laser beam quality deterioration, restricting Tm/Ho laser output power, restricting laser practicability, etc., to reduce high-heat lens effect, convenient implementation, avoiding severe deterioration

Active Publication Date: 2022-03-04
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the Tm / Ho laser in the prior art, due to the high thermal lens effect, restricts the output power of the Tm / Ho laser and causes the laser beam quality to deteriorate sharply with the increase of the output power, which restricts the laser in nonlinear frequency conversion, material Practicality in many Ho laser application fields such as processing and laser radar

Method used

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  • High-beam-quality Ho laser

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Embodiment 1

[0086] figure 1 It is a schematic diagram of the overall structure of the high beam quality Ho laser of this embodiment.

[0087] Such as figure 1 As shown, the high beam quality Ho laser of the present invention includes: a laser 1, a shaping module 2, a resonant cavity composed of a first front cavity mirror 3 and a first coupling output mirror 5, and a gain medium 4 arranged in the resonant cavity. ; The structural representation of the gain medium 4 in this embodiment is shown in figure 2 , including a first medium 41 and a second medium 42, both of which may or may not be connected by bonding, which is a bonding connection in this embodiment. Both the host crystals of the first medium 41 and the second medium 42 are negative thermo-optic coefficient crystals; of course, the host crystals of one of the media may also have a negative thermo-optic coefficient. The first medium 41 is used to generate the thulium laser under the pumping of the pumping light emitted by the ...

Embodiment 2

[0095] In this embodiment, two high-power fiber-coupled LD lasers 1 are used to pump both ends of the bonded gain medium. The overall structure is shown in Figure 8 . The high beam quality Ho laser of the present invention includes: a laser 1, a shaping module 2, a resonant cavity composed of a second front cavity mirror 8 and a second outcoupling mirror 9, and a gain medium 4 and a dichroic lens arranged in the resonant cavity Mirror 7; the light entrance surface of the second front cavity mirror 8 is perpendicular to the light exit surface of the second outcoupling mirror 9; the dichroic mirror 7 is arranged between the second front cavity mirror 8 and the second outcoupling mirror 9 and is connected with the first outcoupling mirror Both the two front cavity mirrors 8 and the second outcoupling mirror 9 form an included angle of 45 degrees; the gain medium 4 is arranged between the second front cavity mirror 8 and the dichroic mirror 7 . The dichroic mirror 7 deflects the...

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Abstract

The invention discloses a high-beam-quality Ho laser which comprises a pumping source, a resonant cavity and a gain medium arranged in the resonant cavity. The gain medium comprises at least one thulium ion-doped first medium and at least one holmium ion-doped second medium; the host crystal of the first medium and / or the second medium is a negative thermo-optical coefficient crystal; the first medium is used for generating thulium laser under the pumping of the pumping light emitted by the pumping source; and the second medium is used for generating holmium laser under the pumping of the thulium laser, and the holmium laser is emitted from the resonant cavity. According to the high-beam-quality Ho laser, by using the negative thermo-optical coefficient crystal, the high thermal lens effect under high-power LD pumping can be remarkably reduced, high-power and high-beam-quality linear polarization Ho laser can be directly generated, and the laser is simple in structure.

Description

technical field [0001] The application relates to a Ho laser with high beam quality, which belongs to the technical field of solid-state lasers. Background technique [0002] Common implementations of solid-state holmium (Ho) lasers include: gallium aluminum arsenide laser semiconductor (LD) (wavelength range 750nm ~ 810nm) pumped thulium (Tm) ion-sensitized Tm, Ho co-doped laser; 1.9μm laser pumped single Doped Ho lasers; Tm / Ho lasers with resonantly pumped Ho lasers in the cavity of thulium lasers. [0003] Compared with other implementation methods, Tm / Ho lasers are based on the principle of intracavity co-band pumping, which can achieve high-efficiency room-temperature Ho laser output from a single laser gain medium under 800nm ​​conventional LD ​​pumping, with compact structure and miniaturization , low cost, and high LD-to-Ho laser conversion efficiency are expected to replace the current mainstream co-pumped Ho lasers. [0004] However, the Tm / Ho laser in the prior ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/07H01S3/16H01S3/0941
CPCH01S3/07H01S3/0941H01S3/09415H01S3/1616H01S3/161H01S3/1645H01S3/1653
Inventor 黄海洲林文雄胡华文黄见洪李锦辉翁文戴殊韬
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI