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A Wide-Wavelength Tuned Single Longitudinal Mode Laser Based on a Monolithic Ring Cavity

A ring cavity and laser technology, applied in the laser field, can solve the problems of poor wavelength expansion and achieve the effects of narrow line width, low noise and high stability

Active Publication Date: 2022-04-29
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the shortcomings of poor wavelength expansion of the existing monolithic non-planar ring cavity single-frequency laser technology

Method used

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  • A Wide-Wavelength Tuned Single Longitudinal Mode Laser Based on a Monolithic Ring Cavity
  • A Wide-Wavelength Tuned Single Longitudinal Mode Laser Based on a Monolithic Ring Cavity

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Embodiment 1

[0035] Please refer to the disclosure of this embodiment figure 1 As shown, a single longitudinal mode laser with wavelength width tuning based on a monolithic ring cavity disclosed in this embodiment includes:

[0036]The pump laser 1 is a semiconductor laser with a wavelength of 1470 nm and a spectral width of 7 nm. The pump laser is coupled through a fiber with a core diameter of 200 μm and a numerical aperture of 0.22, and the output power is 8 W.

[0037] The pump collimation system 2 is an aspheric lens with a focal length of 37mm. Both sides are coated with an anti-reflection coating of 1470nm±10nm, which can compress the divergence angle of the pump laser to 0.02 degrees, and the spot size is 16.3mm.

[0038] Focusing lens 3 is a spherical lens with a focal length of 75mm, both sides are coated with an anti-reflection coating of 1470nm±10nm, and focuses the laser light into a single annular cavity with a spot size of about 400μm.

[0039] The transmittance of the dich...

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Abstract

The invention discloses a wavelength-width tunable single longitudinal mode laser based on a monolithic annular cavity, which belongs to the technical field of lasers. The invention includes a pumping laser, a pumping collimation system, a focusing lens, a dichroic mirror, a single ring cavity, a half-wave plate, a polarization beam splitter, a beam collimation system, a slit, and a reflective diffraction grating. The reflective diffraction grating is used to realize tunable output of laser wavelength and narrowing of line width. The present invention uses a reflective blazed grating to realize self-seed injection on the basis of a single ring cavity, realizes high-quality single longitudinal mode output without adding a magnetic field, greatly expands the wavelength tuning range of a single-frequency laser, and can narrow the line Wide, improve the stability of the output beam of the laser, and the output beam has the advantages of low frequency and power noise. The invention adopts the diffraction order reflected by the reflective diffraction grating to realize the wavelength screening, and realizes the wavelength tunable output of the single longitudinal mode laser output by changing the Littrow angle and adjusting the size of the slit.

Description

technical field [0001] The invention relates to a wavelength-width tuned single longitudinal mode laser based on a monolithic ring cavity, which belongs to the technical field of lasers. Background technique [0002] Many laser applications such as molecular spectroscopy, remote sensing detection, medical diagnosis and treatment, photoelectric countermeasures, and optical communications require wavelength-tunable single-frequency light sources. In the fields of quantum optics, condensed matter physics, and optical frequency standards, single-frequency laser sources with high stability, low noise, narrow linewidth, and tunable wavelength are required. In terms of gas detection, a single-frequency laser with a wide tuning range can measure a variety of gas components, which broadens the applicable range of the laser. In order to improve the stability of single-frequency laser, the method of using a single non-planar ring cavity is proposed, such as the invention patent ZL 200...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/08H01S3/10
CPCH01S3/08H01S3/08031H01S3/10H01S3/08086
Inventor 王庆高春清李岩王润雨
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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