Continuous running high-power multi-wavelength optical fiber light source based on ultra continuous spectrum

Abstract

The present invention relates to fiber light source, and is especially one kind of fiber light source based on super continuous spectrum technology to realize high power continuous multi-wavelength output. The technology of the present invention includes adopting the output of great power continuous wave Raman fiber laser with central wavelength of 1.24 micron as the pumping light; introducing the pumping light into super continuous spectrum cavity of nesting structure comprising common monomode fiber and fiber grating; converting the energy of the pumping light into next stage Stokes light in 1.31 micron band under the action of Raman scattering, modulating unstability and other non-linear fiber effects; expanding into very wide continuous spectrum; and spectrum segmentation after filtering to obtain multi-wavelength output in 1.31 micron band. The present invention has the advantages of high output power, high time and temperature stability, etc.

Description

Technical field [0001] The invention relates to an optical fiber light source, in particular to a high-power multi-wavelength output optical fiber light source that realizes continuous operation based on supercontinuum technology. Background technique [0002] At present, the methods used to generate multi-wavelength light sources at home and abroad generally include the following: (1) Multi-wavelength light sources composed of multiple distributed feedback (DFB) laser groups with close wavelengths [Sudoh TK, Nakano Y., et al ., "Wavelength trimming technology for multiple wavelength distributed feedback laser arrays byphoto induced refractive index change", Electron. Lett., 1997, 33(3): 216-217]; (2) Using selective feedback or adding filters Spectral division of erbium-doped fiber laser output [Wysocki PFet al., "Characteristics of erbium-doped superfluorescent fiber sources for interferometric sensor applications", J. Lightwave Technol, 1994, 12(3): 550-567]; (3 ) Perform spec...

AI Technical Summary

Problems solved by technology

The method (1) because the output wavelength of the DFB laser varies with the effective refractive index of the waveguide, it is quite difficult to precisely control the output spectrum and the channel spacing of the wavelength router to match, and the use of multiple DFB lasers at the same time makes the cost too high and the process complicated

Method (2) avoids the simultaneous use of multiple laser couplings, but the erbium-doped fiber laser only has a wide gain spectrum in the 1550nm band, and is greatly affected by temperature. It cannot provide a wide output spectrum for spectrum segmentation at room temperature.

Although method (3) can make up for the shortcomings of the above two methods, the pump source used is a pulsed laser, and the multi-wavelength output works in a pulsed manner, and it is difficult to obtain a higher power output

Therefore, these methods have defects and are greatly limited in practical application.

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