Watt-grade broadband super-fluorescence light source with ytterbium doped photonic crystal fiber

A photonic crystal fiber, watt-scale technology, applied in the direction of cladding fiber, fixed light source, optical waveguide light guide, etc., can solve the problems of loss of energy, poor spectral flatness, etc., and achieve high slope efficiency, high output power, and high coupling efficiency. Effect

Inactive Publication Date: 2006-10-11
NANKAI UNIV
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Problems solved by technology

[0013] This kind of supercontinuum light source can achieve high output power, but its spectral flatness is very poor, and it needs to be applied after spectral shaping, and it is bound to lose a large part of energy in spectral shaping

Method used

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  • Watt-grade broadband super-fluorescence light source with ytterbium doped photonic crystal fiber
  • Watt-grade broadband super-fluorescence light source with ytterbium doped photonic crystal fiber

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Embodiment approach

[0053] First, detect the output power and output spectrum of the pump source LD, adjust the working environment temperature to ensure that the central lasing wavelength of the pump source is 976 nm, connect the SMA905 connector of the output end of the LD pigtail to the lens coupling system, and adjust the level and collimation. First, carefully adjust the position of the vertical cutting end of the PCF without adding a dichroic mirror, and at the same time detect the output power at the end of the PCF, so that as much light as possible is coupled into the fiber, then move the fiber back a little, insert the dichroic mirror carefully again Adjust the optical path to maximize the output power, then remove the power meter, use a spectrometer to monitor the spectrum, carefully adjust the dichroic mirror to make it close to the vertical cut end face of the fiber, and observe that the output spectrum is as flat as possible, and finally use the collimator. The lens will output the hy...

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Abstract

The invention relates to an ultra-fluorescence optical fiber light source, which uses Yb-doped photon crystal optical fiber as gain medium, to attain low time interference and high space interference, belonging to the technique of wide-band optical fiber light source and optical fiber sensing. Wherein, the pump semi-conductor laser, lens coupling system, dichroic mirror, Yb-doped large mode-area dual-envelope photo crystal optical fiber and collimation lens are arranged to form dual-range forward or backward output device; compared to general high-power optical fiber ultra-fluorescence light source, the invention has simple structure, better time stability, high incline efficiency, high output power, flat spectrum, and wider band width. The invention can be used in optical fiber sensing, optical fiber top, and optical tomography, etc.

Description

technical field [0001] The invention relates to a super-fluorescent optical fiber light source, in particular to a super-fluorescent optical fiber light source with low temporal coherence and high spatial coherence using ytterbium-doped photonic crystal fiber as a gain medium. It belongs to the technical field of broadband optical fiber light source and optical fiber sensing. Background technique [0002] With the development of optical communication and optical fiber sensing technology, high-power optical fiber light sources with high spatial coherence and low temporal coherence are urgently required. This high-power superfluorescent fiber light source also has a wide range of applications in fiber-optic gyroscopes, optical tomography, and damage-free detection of optical waveguides. In order to obtain higher resolution, the bandwidth of such light sources is required to be wide enough; in order to have sufficient detection depth, the detection light is required to have su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V13/00F21V17/00G02B6/02G02B6/25G02F1/35H01S3/00
Inventor 李乙钢刘胜利丁镭张炜闫培光吕可诚
Owner NANKAI UNIV
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