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Orthogonal line polarization birefringence double-frequency Nd: YAG laser

A YAG laser, birefringence technology, used in lasers, laser parts, phonon exciters, etc., can solve problems such as difficult processing, achieve the effects of low processing cost, overcome processing difficulties, and improve output power

Pending Publication Date: 2022-01-14
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of orthogonal linear polarization birefringence double-frequency Nd:YAG laser, solve the problem that PLZT ceramic electro-optic birefringence F-P etalon is difficult to process in the existing electro-optic birefringence dual-frequency Nd:YAG laser technology

Method used

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  • Orthogonal line polarization birefringence double-frequency Nd: YAG laser
  • Orthogonal line polarization birefringence double-frequency Nd: YAG laser
  • Orthogonal line polarization birefringence double-frequency Nd: YAG laser

Examples

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Effect test

Embodiment 1

[0046] The F-P etalon mode-selected quarter-wave plate birefringence dual-frequency Nd:YAG laser with a frequency difference of 130 GHz, its system composition is as follows figure 2 shown.

[0047] In this embodiment, the length of the LD pigtail 3 is 1 m, the core diameter is 100 μm, and the numerical aperture NA=0.22; the maximum power of the 808 nm pump light emitted from the LD pigtail 3 is 8 W, and the size of the self-focusing lens 4 is Ф2 .6mm×6.5mm, numerical aperture NA=0.6, central refractive index 1.65; the size of Nd:YAG crystal 5 is 3mm×3mm×5mm, the light-passing length is 5mm, and the doping concentration is 1.1%. The absorption coefficient is 3.4cm -1 ; The pumping end (left end) of Nd:YAG crystal 5 is vapor-deposited to 808nm pumping light antireflection, and to 1064nm oscillating laser highly reflective two-color dielectric film, as the rear reflector of laser cavity, Nd:YAG crystal 5 The right end face of the 1064nm laser is coated with an anti-reflection...

Embodiment 2

[0050] In this embodiment, on the basis of embodiment 1, the geometric thickness of the fused silica F-P etalon 6 is changed to 1.2 mm, and the corresponding free spectral range is 85 GHz; the size specifications and characteristic parameters of other optical components in the system are the same as those in the embodiment 1, the optical length of the laser resonator is less than 34mm, by fine-tuning the inclination angle of the F-P etalon 6 and the length of the laser cavity, the two adjacent transmission peaks of the F-P etalon 6 and the two orthogonal linear polarization longitudinal modes can be realized Frequency matching, so as to obtain 1064nm orthogonal linearly polarized dual-frequency laser output with a frequency difference of about 85GHz.

Embodiment 3

[0052] LD-pumped passive Q-switched quarter birefringence dual-frequency Nd:YAG laser system consists of image 3 shown.

[0053] The LD pumped passive Q-switched quarter birefringent dual-frequency Nd:YAG laser system is based on Example 1, and a saturable absorber Cr with a thickness of 2mm is placed in the laser cavity. 4+ :YAG crystal 7-1, its initial transmittance is 85%; the left end surface of Nd:YAG crystal 5 is made into a spherical surface (radius of curvature is 150mm), coated with anti-reflection for 808nm pump light and high reflection for 1064nm oscillating laser The two-color dielectric film is used as the rear reflector of the resonator, and its right end is coated with a 1064nm anti-reflection dielectric film; on the left end of the quarter-wave plate 7, a 1064nm anti-reflection dielectric film is evaporated, and its right end is evaporated with a 1064nm transmittance 2.6% dielectric film, as a laser output coupling mirror, forms a flat-concave stable cavity ...

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Abstract

The invention discloses an orthogonal line polarization birefringence double-frequency Nd: YAG laser, which comprises an LD controller, the LD controller is sequentially connected with an LD pumping source and an LD tail fiber through a cable, and a self-focusing lens, an Nd: YAG crystal and an F-P etalon are sequentially arranged along the propagation direction of pump light output by the LD tail fiber; a quarter-wave plate and an output coupling mirror are sequentially arranged in the transmission direction of the output light side of the F-P etalon, a piezoelectric ceramic tube is arranged on the side, away from the quarter-wave plate, of the output coupling mirror, and the piezoelectric ceramic tube is connected with an adjustable direct-current voltage source through a cable. The problem that the PLZT ceramic electro-optical birefringence F-P etalon in the existing electro-optical birefringence double-frequency Nd: YAG laser technology is difficult to process is solved.

Description

technical field [0001] The invention belongs to the technical field of solid lasers, and relates to an orthogonal linear polarization birefringence dual-frequency Nd:YAG laser. Background technique [0002] Dual-frequency lasers have important application value in the fields of laser sensing and measurement. Compared with dual-frequency gas lasers, dual-frequency solid-state lasers have a wide gain linewidth and can generate dual-frequency laser outputs with large frequency differences. They are especially suitable for Synthetic wave absolute distance interferometry requirements. [0003] At present, researchers at home and abroad have used various methods to achieve dual-frequency laser output, such as: [0004] 2007Julien Le proposed an LD-pumped electro-optic birefringent dual-frequency Nd:YAG laser【 J L,Morvan L,Alouini M,et al.Dual-frequency single-axis laser using alead lanthanum zirconate tantalate(PLZT)birefringent etalon for millimeterwave generation:beyond the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16H01S3/0941H01S3/10
CPCH01S3/1611H01S3/1643H01S3/0941H01S3/10061
Inventor 焦明星王玉栋邢俊红连天虹刘芸
Owner XIAN UNIV OF TECH
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