Super-continuous spectrum light source based on multicore photonic crystal fiber

Abstract

The invention provides a super-continuous spectrum light source based on a multicore photonic crystal fiber, which comprises a pump laser with an output pigtail, and a multicore photonic crystal fiber. The output pigtail of the selected pump laser is welded with an input end of the multicore photonic crystal fiber with matched mode field and a dispersion characteristic to form a whole-fiber super-continuous spectrum light source. The multicore photonic crystal fiber with larger mode field area and adjustable dispersion characteristic can be taken as a generating medium of the super-continuous spectrum, which effectively solves the problems that the normal single-core photonic crystal fiber as the generating medium of the super-continuous spectrum is difficult to weld with the pump laser, and the dispersion characteristic of the photonic crystal fiber is not matched with the operating wavelength of the pump laser, when generating the high-average power whole-fiber super-continuous spectrum, can effectively realize output of the high-average power whole-fiber super-continuous spectrum, and at the same time, greatly improve the power upper limit of the system.

Description

technical field [0001] The invention relates to the field of fiber laser technology, in particular to a light source capable of realizing high average power all-fiber supercontinuum output. Background technique [0002] At present, the low-power supercontinuum light source realized by using fiber laser to pump photonic crystal fiber has become a practical commodity. However, some applications require supercontinuum light sources with high average output power and high spectral density, and the existing supercontinuum light sources cannot meet the needs. [0003] A supercontinuum light source generally includes two parts: a pump source and a supercontinuum generating medium. The parameters of the pump laser (operating wavelength, pulse width, pulse peak power) and the characteristics of the nonlinear medium (dispersion characteristics, nonlinear response) together determine what nonlinear effects can occur and the final output supercontinuum form. In fact, the small differe...

AI Technical Summary

Problems solved by technology

There are literatures that prove that supercontinuum generation can be achieved by using multi-core photonic crystal fibers, but in these literatures, the pump laser is coupled into the photonic crystal fiber by lens coupling, which reduces the stability of the system and is not conducive to practical applications.

At present, there have been patent announcements related to continuum light sources, but there is no patent for using multi-core photonic crystal fiber as a supercontinuum generation medium.

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