Intermediate-infrared fiber bragg grating frequency-stabilized quantum cascade laser and implementation method thereof
A quantum cascade, laser technology, applied in lasers, phonon exciters, laser components and other directions, can solve the problems of immature fiber Bragg grating preparation technology
Inactive Publication Date: 2020-08-21
XUZHOU NORMAL UNIVERSITY
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Problems solved by technology
In the mid-infrared above 4 microns, due to the immaturity of fiber Bragg grating preparation technology, there has been no work using mid-infrared fiber Bragg grating as an external cavity frequency stabilization device to achieve quantum cascade laser output.
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[0038] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0039] Such as figure 1 As shown, a kind of mid-infrared fiber grating frequency-stabilized quantum cascade laser according to the present invention includes:
[0040] A 4 micron mid-infrared Fabry-Perot cavity quantum cascade laser 1 is used as the light source, and its output spectrum is as follows figure 2 As shown, the central wavelength of the laser is 4.045 microns, and the spectral 3dB bandwidth is 19 nanometers;
[0041] The first mid-infrared lens 2 is CaF 2Crystal plano-convex spherical lens with a diameter of inches, with a focal length of 30mm;
[0042] The second mid-infrared lens 3 is CaF 2 Crystal plano-convex spherical lens with a diameter of inches, with a focal length of 10 mm;
[0043] A section of mid-infrared single-mode optical fiber 4 is used as a carrier for writing fiber Bragg gratings and th...
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Abstract
The invention discloses an intermediate-infrared fiber bragg grating frequency-stabilized quantum cascade laser and an implementation method thereof. The intermediate infrared laser comprises an intermediate infrared quantum cascade laser, a first intermediate infrared lens, a second intermediate infrared lens, an intermediate infrared single-mode fiber, a fiber bragg grating and a temperature control unit. Laser output of the intermediate infrared quantum cascade laser which is poor in space output mode and low in line width frequency stabilization capacity is coupled into a section of the intermediate infrared single-mode fiber, a narrow-line-width Bragg grating on the intermediate infrared single-mode fiber serves as an external cavity frequency stabilization unit, and single-transverse-mode laser with stable wavelength and narrow-line-width fiber output is achieved. The narrow linewidth optical fiber output laser light source compact in structure, high in output mode quality, and with the mid-infrared wavelength more than 4 microns is realized.
Description
technical field [0001] The invention relates to a semiconductor laser with a narrow line width in the mid-infrared band, in particular to a mid-infrared fiber grating frequency-stabilized quantum cascade laser output from a single-mode fiber and a wavelength tunable, and a realization method thereof. Background technique [0002] The mid-infrared 2-20 micron band has important practical value, and the fingerprint fundamental frequency vibration absorption lines of life-related gas molecules containing carbon, hydrogen, oxygen, nitrogen and volatile organic compounds all fall in this band; at the same time 3 -5 microns and 8-12 microns are two transparent windows of the atmosphere. Laser signals can achieve low-loss transmission from kilometers to tens of kilometers in the atmosphere. Therefore, mid-infrared laser spectroscopy technology is widely used in atmospheric remote sensing, satellite communications, national defense and security There are many important needs in the ...
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IPC IPC(8): H01S5/34H01S5/065H01S5/14
CPCH01S5/0651H01S5/141H01S5/3401
Inventor 施进丹冯宪
Owner XUZHOU NORMAL UNIVERSITY