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Semiconductor laser for 50: 50 split optical fiber coupling output, and method

A fiber coupling and semiconductor technology, applied in the field of lasers, can solve the problems that the position deviation of the coupler is easy to affect the coupling efficiency and the beam quality, and limit the application, so as to improve the accuracy of data, increase the stability and reliability, and optimize the coupling efficiency. Effect

Pending Publication Date: 2021-07-23
THE FIRST RES INST OF MIN OF PUBLIC SECURITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the pluggable fiber optic coupler is easy to operate and the fiber can be replaced, but the position deviation of the coupler (including the distance between the fiber end face and the focal point, angle pitch, etc.) can easily affect the coupling efficiency and beam quality
The integrated single-channel optical fiber output method also limits its application in fields such as genetic genealogy analysis

Method used

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  • Semiconductor laser for 50: 50 split optical fiber coupling output, and method
  • Semiconductor laser for 50: 50 split optical fiber coupling output, and method

Examples

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Effect test

Embodiment 1

[0024] This embodiment provides a 50:50 split-fiber coupled output semiconductor laser, such as figure 1 As shown, it includes pump laser generator 1, focusing lens 2, semiconductor gain chip 3, output coupling mirror 5, frequency doubling crystal 6, end mirror 7, coupling lens 8, splitting fiber input port 10, splitting fiber output port One 11 and splitting fiber output end two 12; the included angle between the midline of the emission end of the pump laser generator 1 and the end face of the semiconductor gain chip 3 is 45°, and the focusing lens 2 is located at the pump laser generator 1 between the transmitting end of the semiconductor gain chip 3 and the output coupling mirror 5; On the way, the frequency doubling crystal 6 is located between the end mirror 7 and the output coupling mirror 5; the coupling lens 8 is located on the transmission optical path of the output coupling mirror 5, and the splitting fiber input end 10 is opposite to the output end of the coupling l...

Embodiment 2

[0031] This embodiment provides a working method of the semiconductor laser described in Embodiment 1, and the specific process is:

[0032] The pump laser generator 1 emits laser light with a wavelength of 808nm, which is converged by the focusing lens 2 and focused at 45° on the semiconductor gain chip 3, and the semiconductor gain chip 3 generates laser light with a wavelength of 1010nm.

[0033] It should be noted that, because the end face of the semiconductor gain chip 3 has a highly reflective mirror region (Bragg reflector structure), the reflectivity to laser light with a wavelength of 1010nm is greater than 99.9%, and forms a 1010nm resonant cavity with its output window region, so the output wavelength of 1010nm laser.

[0034]The 1010nm laser light is reflected by the output coupling mirror 5 and converged onto the frequency doubling crystal 6, and the laser light with a wavelength of 505nm is generated by the frequency doubling effect of the frequency doubling cry...

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Abstract

The invention discloses a semiconductor laser for 50: 50 split optical fiber coupling output and a method. According to the invention, an included angle between the center line of the transmitting end of a pumping laser generator and the end face of a semiconductor gain chip is 45 degrees, and a focusing lens is located between the transmitting end of the pumping laser generator and the semiconductor gain chip; an output coupling mirror is opposite to an output window area of the semiconductor gain chip, a frequency doubling crystal is located on a reflection light path of the output coupling mirror, and an end mirror is opposite to an emergent end of the frequency doubling crystal; a coupling lens is positioned between the emergent end of the output coupling mirror and the input end of a split optical fiber; and the input end of the split optical fiber is connected with a first output end of the split optical fiber and a second output end of the split optical fiber through an optical fiber splitter. According to the invention, intensity calibration can be carried out in a fluorescence spectrum and a Raman spectrum of genetic spectroscopy analysis, data accuracy is improved, and the complexity of a spatial spectroscopic optical path of a test system is simplified.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a semiconductor laser coupled and output by a 50:50 splitting fiber and a method thereof. Background technique [0002] Semiconductor lasers are widely used in communication, medical, industrial and military fields due to their advantages of small size, light weight, high efficiency, and wide coverage. Among them, the optical pumping semiconductor vertical cavity surface emitting laser (OPS-VCSEL) shortens the cavity length by forming oscillations perpendicular to the chip growth direction, and has low threshold current, high modulation frequency and high output power. , high beam quality, high coupling efficiency, and low cost have attracted much attention. [0003] In practical applications, the output of the free-space optical path of solid-state lasers brings a lot of inconvenience to operation and maintenance, and the traditional fiber-coupled solid-state lasers use a single...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/094
CPCH01S3/06708H01S3/06783H01S3/094053
Inventor 王守山浦国斌崔海涛金川张涛
Owner THE FIRST RES INST OF MIN OF PUBLIC SECURITY
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