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HeNe laser device capable of outputting two beams of vertically polarized light with stabilized intensity

A vertical polarization, laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of increased cost, complex and bulky system, etc.

Inactive Publication Date: 2005-09-21
TSINGHUA UNIV
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  • Application Information

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Problems solved by technology

Doing so will make the system complex and cumbersome, and the cost will be greatly increased

Method used

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  • HeNe laser device capable of outputting two beams of vertically polarized light with stabilized intensity
  • HeNe laser device capable of outputting two beams of vertically polarized light with stabilized intensity
  • HeNe laser device capable of outputting two beams of vertically polarized light with stabilized intensity

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Embodiment Construction

[0025] The experimental device of the present invention is as figure 2 As shown, 1 is the tail light output mirror of the HeNe laser, and its reflectivity is generally 99.8%. 2 is the gain tube of the laser, which is filled with a mixed gas of HeNe. Beam output mirror, the reflectivity is generally 98%. 1, 2, 3 and 4 together form the main body of a common HeNe laser. In order to ensure that the laser can work in a single-mode state or in a dual-mode state, we design the laser cavity length to be 155mm, and the cavity length satisfies the restriction of formula 2. In order to ensure that a certain polarized light in the cavity can obtain stable light intensity output, a stress is applied to the anti-reflection window 3 of the existing laser through the mechanical stress applying device 5 to generate a birefringence effect. The birefringence effect can make one longitudinal mode output two vertically polarized frequencies, and the difference between these two frequencies is ...

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Abstract

A HeNe laser capable of emitting two vertical polarizations with stable light intensity, which contains laser gain pipe with high reflectance tail light output mirror and anti-reflection window piece in tow sides, a main light beam output mirror in one side of anti-reflection window piece, transverse magnetic field generator and small frequency difference generator which is a double fraction crystal located between anti-reflection window piece and main light beam output mirror, the laser fixed on support frame and has advantages of small light intense fluctuation, fine stability and strong interference resisting.

Description

technical field [0001] The invention belongs to the field of laser design. Background technique [0002] The self-mixing interference displacement test technique (also known as the optical return breakdown test technique) is a technique that uses the phenomenon that the light intensity of the laser changes as the output light returns to the resonator for measurement. The optical path system of this kind of displacement measuring device has only one laser and one external reflector. The light output by the laser is reflected or scattered and returns to the laser resonator cavity. It mixes with the light in the cavity to cause the power of the laser to change. The laser power changes by one fringe every time the external mirror moves by half the wavelength of the light wave. Interferometric systems are comparable. Laser power fringes can be directly used for counting to achieve displacement measurement, and the system resolution is half a wavelength. [0003] The self-mixin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/00H01S3/223
Inventor 刘刚张书练朱钧李岩
Owner TSINGHUA UNIV