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LD pumping cogain double cavity very-large frequency difference double frequency Nd:YAG laser

A YAG laser, frequency difference technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problem of small frequency difference of dual-frequency lasers

Inactive Publication Date: 2007-01-31
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a LD pumped common gain double-cavity dual-frequency Nd:YAG laser with a super large frequency difference, which solves the problem that the frequency difference of the existing dual-frequency laser is relatively small, and is a photoconductive switch for THz radiation, microwave and Millimeter wave systems and absolute distance interferometry systems provide ideal light sources

Method used

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  • LD pumping cogain double cavity very-large frequency difference double frequency Nd:YAG laser
  • LD pumping cogain double cavity very-large frequency difference double frequency Nd:YAG laser
  • LD pumping cogain double cavity very-large frequency difference double frequency Nd:YAG laser

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Embodiment

[0036] Such as image 3 In the structure shown, the nominal wavelength of the LD 2 is 808 nm, the core diameter of the LD pigtail 3 is 100 μm, the numerical aperture NA=0.22, and the maximum output power is 1.5 W. The 808nm pumping light converges into the Nd:YAG crystal 5 through the converging optical system 4 (self-focusing lens, the size is φ2.6mm×6.5mm, the numerical aperture NA=0.6). Nd:YAG crystal 5 has a doping concentration of 1.1%, a size specification of 3mm×3mm×5mm, and a length of 5mm in the direction of light transmission. rate is greater than 99.8%), to 808nm anti-reflection (transmission rate is greater than 95%), the right end face of Nd:YAG crystal 5 is coated with 1064nm anti-reflection dielectric film (transmission rate is greater than 99.9%); the size of polarization beam splitter prism 7 in the cavity The specification is 12.7mm×12.7mm×12.7mm, the transmittance of p component and s component reflectance of 1064nm light wave are 99.6% and 99.95% respectiv...

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Abstract

The invention discloses an LD pumped co-gain double-cavity very large frequency difference double-frequency Nd:YAG laser, comprising: LD, LD controller, LD tail fiber, collecting optical system and laser resonance cavities, where the left end face of the Nd:YAG crystal and a first output coupling mirror compose a straight line cavity, KTP frequency doubling crystal and polarizing light splitting prism are arranged in order behind the Nd:YAG crystal in the straight line, a second output coupling mirror is arranged in the direction vertical to the axis of the straight line cavity and in the position corresponding to the polarizing light splitting prism, the left end surface of the Nd:YAG crystal and the second output coupling mirror compose a right angle cavity, the two resonance cavities contain the same Nd:YAG crystal and birefracting filter plate composed of polarizing light splitting prism and KTP frequency doubling crystal, making them both operate in single longitudinal mode; the straight line cavity and the right angle cavity can contain two KTP frequency doubling crystals which compose two birefracting filter plates with the polarizing light splitting prism, thus making the two resonance cavities both operate in single longitudinal mode. And two single-frequency green lights outputted by the straight line cavity and the right angle cavity are merged into orthotropic linear polarizing double frequency 532 green light whose maximum frequency difference can reach 360GHz.

Description

technical field [0001] The invention belongs to the technical field of solid-state lasers, and relates to a dual-frequency Nd:YAG laser, in particular to a dual-frequency Nd:YAG laser pumped by a laser diode (LD) with a common gain and a dual-cavity super-large frequency difference. Background technique [0002] M.Brunel et al. of Rennes University in France pumped the Nd:YAG crystal longitudinally with two orthogonal linearly polarized Ti:Sapphire lasers with a lateral distance of about 1mm, and placed a 1064nm quarter-wave plate on both sides of the crystal to eliminate the gain space Hole burning effect, by changing the angle between the fast and slow axes of the two wave plates, and supplemented by fused silica F-P etalon angle tuning, the simultaneous oscillation output of 1064nm dual-frequency laser with a frequency difference of 0-26GHz is realized [M.Brunel , F. Bretenaker. Tunable optical microwave source using spatially resolved laser eigenstates. Opt. Lett., 1997,...

Claims

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Application Information

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IPC IPC(8): H01S3/08H01S3/0941H01S3/16H01S3/10
Inventor 焦明星
Owner XIAN UNIV OF TECH
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