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Wavelength width tuning single longitudinal mode laser based on single annular cavity

A ring cavity and laser technology, applied in the field of lasers, can solve problems such as poor wavelength expansion, and achieve the effects of narrow line width, widening selectivity, and low noise.

Active Publication Date: 2022-03-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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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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  • Wavelength width tuning single longitudinal mode laser based on single annular cavity
  • Wavelength width tuning single longitudinal mode laser based on single annular 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 tuning single longitudinal mode laser based on a single annular cavity, and belongs to the technical field of laser. The laser comprises a pump laser, a pump collimation system, a focusing lens, a dichroic mirror, a single annular cavity, a half-wave plate, a polarization beam splitter, a light beam collimation system, a slit and a reflective diffraction grating. The reflective diffraction grating is used for realizing tunable output of laser wavelength and narrowing of line width. Self-seed injection is realized by adopting the reflective blazed grating on the basis of a single annular cavity, high-quality single longitudinal mode output is realized under the condition that a magnetic field is not added, the wavelength tuning range of the single-frequency laser is greatly expanded, the linewidth can be narrowed, the stability of output beams of the laser can be improved, and the laser has wide application prospects. And the output light beam has the advantage of low frequency and power noise. The wavelength screening is realized by adopting the diffraction order reflected by the reflective diffraction grating, and the wavelength tunable output of the single longitudinal mode laser output is realized 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 Applications(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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