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Raman laser enhancement device and method based on high-nonlinearity photonic crystal fiber

A photonic crystal fiber, Raman laser technology, applied in lasers, phonon exciters, laser parts and other directions, can solve problems such as not being a general method in industrial fields, achieve good time consistency, improve sensitivity, and detect sensitivity Enhanced effect

Pending Publication Date: 2021-05-04
NANJING UNIV OF TECH
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Problems solved by technology

However, they all have their own advantages and limitations, and cannot be a general method for industrial sites.

Method used

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  • Raman laser enhancement device and method based on high-nonlinearity photonic crystal fiber

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Embodiment Construction

[0017] like figure 1 As shown, based on highly nonlinear photonic crystal fiber Raman laser enhancement device, its structure is composed of ytterbium-doped fiber laser, Faraday isolation, fiber beam combiner, polarization controller, Bragg grating FBG1, highly nonlinear photonic crystal fiber, A Bragg grating FBG2, a T-connector 1, a Bragg grating FBG3, a photonic crystal fiber, a Bragg grating FBG4, a T-connector 2, a spectrum analyzer, and a computer processing system are sequentially connected in series.

[0018] The highly nonlinear photonic crystal fiber is to dope a large amount of nonlinear substances in the photonic crystal fiber, so that the photonic crystal fiber becomes a highly nonlinear gain medium, thereby increasing the Raman gain coefficient.

[0019] The two ends of the highly nonlinear photonic crystal fiber are Bragg gratings FBG1 and FBG2 written in the highly nonlinear photonic crystal. In order to efficiently write the Bragg grating into the highly nonl...

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Abstract

The invention provides a Raman laser enhancement device and method based on a high-nonlinearity photonic crystal fiber, and the structure of the Raman laser enhancement device consists of an ytterbium-doped fiber laser, a Faraday isolator, a fiber combiner, a polarization controller, a single-mode fiber SM1, a single-mode fiber SM2, a high-nonlinearity photonic crystal fiber (HNL-PCF), Bragg gratings FBG1, FBG2, FBG3, and FBG4, a photonic crystal fiber, a T-shaped connector 1, a T-shaped connector 2, a spectrum analyzer and a computer processing system.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and relates to a high-nonlinear photonic crystal fiber Raman laser enhancement device and enhancement method, which are used to enhance the Raman effect during online detection of a Raman spectrometer, thereby realizing the qualitative and quantitative analysis of low-concentration gases analyze. Background technique [0002] Raman spectroscopy is a kind of scattering spectrum, which is used to obtain information on molecular vibration and rotation by analyzing the scattering spectrum with a frequency different from that of the incident light, and it is an analytical method applied to the study of molecular structure, which can realize the qualitative and quantitative analysis of substances analyze. At the same time, it is a non-contact detection method that can perform non-destructive testing of substances. Its detection principle is straightforward, the response speed is fast, the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/094H01S3/067H01S3/081H01S3/10H01S3/108
CPCH01S3/094046H01S3/1086H01S3/06754H01S3/0675H01S3/0812H01S3/1003
Inventor 蒋书波冯春
Owner NANJING UNIV OF TECH
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