A resonant cavity supercontinuum light source output device

Abstract

The invention provides a super-continuum-spectrum light source output apparatus of a resonant cavity. The apparatus comprises an optical resonant cavity, an ytterbium-doped fiber, a laser device, an acousto-optic modulator and a tapered fiber, wherein the ytterbium-doped fiber, the laser device, the acousto-optic modulator and the tapered fiber are arranged successively in the optical resonant cavity. The optical resonant cavity is used for controlling an oscillation function in a light beam cavity and outputting a super-continuum-spectrum light source; the ytterbium-doped fiber serves as a gain medium of the super-continuum-spectrum light source; the laser device serves as a pump source of the super-continuum-spectrum light source; the acousto-optic modulator is used for outputting a laser pulse at a specific frequency; and the tapered fiber is used for enhancing a non-linear effect and the energy in a short-wave direction of the super-continuum-spectrum light source. According to the super-continuum-spectrum light source output apparatus, the structure of the existing super-continuum-spectrum light source output apparatus is simplified; the spectrum widening is realized under the circumstance of low pumping power; the cost is lowered; and the light-light conversion efficiency is high.

Description

technical field [0001] The invention relates to the field of fiber lasers, and more specifically, to a resonant cavity supercontinuum light source output device. Background technique [0002] The supercontinuum light source involved in the present invention is a pulsed laser light source, which has a wider spectral range than tunable lasers. When strong light is transmitted in a nonlinear medium, it is affected by self-phase modulation (SPM), cross-phase modulation (XPM), four-wave mixing (FWM), stimulated Raman scattering (SRS), dispersive wave frequency shift, soliton self- The combination of nonlinear effects such as frequency shift and dispersion effects greatly broadens the spectrum, resulting in a supercontinuum light source, and the spectral range of the supercontinuum light source can cover the ultraviolet to near-infrared region. [0003] Due to the characteristics of wide spectrum and spatial coherence, supercontinuum has important applications in material analysi...

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Problems solved by technology

[0004] At present, the output device of the supercontinuum light source in the prior art mainly uses the optical pulse to pump the photonic crystal fiber outside the cavity to generate the supercontinuum light source. The supercontinuum beam produced by it has good quality, wide spectral range and good flatness; but The loss of splicing with ordinary optical fibers is large, the intensity of the required optical pulse is relatively large, and the length of the optical fiber is long, so the cost is high

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