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Saturated absorption frequency stabilization device based on single beam expansion

A single-beam, frequency-stabilized technology, used in lasers, laser parts, semiconductor lasers, etc., can solve problems such as affecting the shape of the saturable absorption spectrum, and achieve the effects of reducing deterioration, improving stability and compactness

Inactive Publication Date: 2019-06-21
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the saturable absorption device needs to be used in combination with a laser, and the distance between the two is generally relatively close on the optical path. Because the isolator inside the laser has a large magnetic force, it often affects the shape of the saturated absorption spectrum.

Method used

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  • Saturated absorption frequency stabilization device based on single beam expansion
  • Saturated absorption frequency stabilization device based on single beam expansion

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0021] like figure 1 Shown is a miniaturized and stable saturable absorption frequency stabilization device based on single beam expansion. It can be seen from the figure that the single beam expansion saturation absorption frequency stabilization device of the present invention includes a beam expansion system composed of lens 1 and lens 2, along the The beam output direction of the beam expander system is the first aperture 3 fixed in the installation housing 12, the polarizing beam splitter 4, the saturated absorption bubble 5, the second aperture 6, the quarter-wave plate 7, the attenuation plate 8 and the zero-degree reflector 9, after being reflected by the zero-degree reflector 9, the light beam passes through the attenuation plate 8, the quarter-wave plate 7, t...

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Abstract

The invention discloses a saturated absorption frequency stabilization device for stabilizing the frequency of a semiconductor laser. The device comprises a beam expanding system, two diaphragms, a polarization beam splitter, a quarter wave plate, an attenuator, a zero-degree reflecting mirror, a focusing lens and a photoelectric detector. Compared with the prior art, the stability of an optical path is high, and a saturated absorption spectrum with high contrast ratio and signal-to-noise ratio can be obtained.

Description

technical field [0001] The invention relates to optical frequency stabilization, in particular to a saturated absorption frequency stabilization device for single beam expansion used for frequency stabilization of semiconductor lasers. Background technique [0002] Semiconductor lasers are widely used in laser spectroscopy, laser cooling, optical imaging, and quantum frequency standards due to their advantages of miniaturization and easy tuning. The output wavelength of semiconductor lasers is easily disturbed by the external environment, so some active frequency stabilization technologies have been applied, the most common one is saturation absorption frequency stabilization. Saturated absorption frequency stabilization devices generally require two beams of light, one beam of pump light and the other beam of probe light with a weaker light intensity, and the two beams of light need to overlap to a large extent. Saturable absorption frequency stabilization devices can be d...

Claims

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Application Information

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IPC IPC(8): H01S5/0687
Inventor 于明圆欧阳鑫川王鑫万金银肖玲成华东刘亮
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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