Full optical fiber type supercontinuum laser source based on multi-component-doped silica optical fiber

Abstract

The invention discloses a full optical fiber type supercontinuum laser source based on a multi-component-doped silica optical fiber. The full optical fiber type supercontinuum laser source comprises a semiconductor laser pumping source, a multimode optical fiber combiner, a first high reflectivity optical fiber grating, a Yb-doped double-clad optical fiber, the multi-component-doped silica optical fiber and a second high reflectivity optical fiber grating. The semiconductor laser pumping source is used for providing excitation energy; the optical fiber grating pair is used for forming laser oscillation; the Yb-doped double-clad optical fiber is used for providing laser gains; and the multi-component-doped silica optical fiber is used for generating a saturated absorption effect, further inducing stimulated brillouin scattering to generate ultra-short pulse laser output and getting supercontinuum laser output by excitation. Through combination of the semiconductor laser pumping source, the Yb-doped double-clad optical fiber and the multi-component-doped silica optical fiber, a photonic crystal optical fiber in a microstructure does not need to be adopted. The super continuum laser source with a simple structural form, higher output power, wide spectral range and good flatness can be obtained.

Description

technical field [0001] The invention relates to the field of fiber lasers, in particular to an all-fiber supercontinuum laser source based on multi-component doped silica fibers. Background technique [0002] The time-domain and frequency-domain evolution of optical pulses in highly nonlinear fibers is not only affected by such factors as spontaneous phase modulation (SPM), cross-phase modulation (XPM), four-wave mixing (FWM), stimulated Raman scattering (SRS), Affected by various nonlinear effects such as stimulated Brillouin scattering (SBS), as well as by the dispersion characteristics of optical fibers, all these nonlinear processes can generate new frequency components. For sufficiently strong pulses, the laser spectrum can be broadened by hundreds of nm or more, and this phenomenon is called supercontinuum generation. [0003] The supercontinuum light source has a wide spectrum and can be widely used in various fields that require a wide-spectrum light source. At pr...

AI Technical Summary

Problems solved by technology

However, photonic crystal fiber also has its significant disadvantages, such as difficulty in fusion with ordinary optical fiber, large fusion loss, high manufacturing cost of optical fiber, and difficult handling.

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