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All-fiber high-energy supercontinuum laser

A supercontinuum and fiber amplifier technology, applied in the field of all-fiber high-energy supercontinuum lasers

Active Publication Date: 2022-05-31
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-energy supercontinuum often requires more than 100 microjoules of laser to pump, and the conventional single-core high nonlinear fiber cannot bear such a large energy

Method used

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  • All-fiber high-energy supercontinuum laser
  • All-fiber high-energy supercontinuum laser
  • All-fiber high-energy supercontinuum laser

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Embodiment Construction

[0037] The present invention will be further described below with reference to examples and accompanying drawings, but the protection scope of the present invention should not be limited by this.

[0038] figure 1 It is a schematic diagram of the structure of a high-energy supercontinuum laser. As shown in the figure, the high-energy supercontinuum laser proposed by the present invention includes a pump laser 1 , a fiber amplifier 2 , a fiber amplifier pigtail 3 , a transition fiber 4 , and a multi-core highly nonlinear fiber 5 . The core diameter of the fiber amplifier pigtail is generally greater than 10 microns, and the mode field of the fiber amplifier pigtail and the multi-core high nonlinear fiber is adapted by "fiber amplifier pigtail-transition fiber-multi-core high nonlinear fiber" fusion splicing. When the laser output from the fiber amplifier passes through the multi-core highly nonlinear fiber, the spectrum will be greatly broadened due to the generation of variou...

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Abstract

An all-fiber high-energy supercontinuum laser includes a pump laser, an optical fiber amplifier, a fiber amplifier pigtail, a transition optical fiber, and a multi-core highly nonlinear optical fiber. Through the fusion splicing of fiber amplifier pigtail, transition fiber and multi-core high nonlinear fiber in sequence, the mode field of fiber amplifier pigtail and multi-core high nonlinear fiber can be adapted, so as to ensure full fiberization and high energy output of supercontinuum laser . The invention uses a laser with a single pulse energy of the order of hundreds of microjoules to pump the multi-core highly nonlinear optical fiber, which overcomes the low damage threshold of the single-core highly nonlinear optical fiber, the large fusion loss between the multi-core highly nonlinear optical fiber and the amplifier tail fiber, and The defect of low coupling efficiency. The single pulse energy of the supercontinuum laser generated by the invention reaches the micro-joule level, further improving the working distance of the supercontinuum laser.

Description

technical field [0001] The invention relates to the field of fiber lasers, in particular to an all-fiber high-energy supercontinuum laser. Background technique [0002] Supercontinuum laser is a high-brightness ultra-broadband laser light source, which specifically refers to coupling an ultra-short pulse laser with high peak power into a highly nonlinear fiber, and using various nonlinear effects of the fiber to greatly broaden the spectrum of the output light. , so as to achieve ultra-broad spectral output. Such laser light sources play a role in many application scenarios. Among them, high-energy supercontinuum light sources can be used in long-range hyperspectral radar detection and other fields, and supercontinuum light sources with different working bands can be used to detect different biological species, which greatly promotes the development of biodiversity remote sensing detection technology. [0003] At present, the two main reasons for realizing the high energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/094
CPCH01S3/06708H01S3/06741H01S3/06716H01S3/094042H01S3/094065
Inventor 王天行毕婉君李夏关珮雯刘垠垚廖梅松于飞王龙飞胡丽丽
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI