Ultra-wideband supercontinuum source based on two-waveband fiber optic laser

Abstract

The invention belongs to the technical field of fiber optic laser light and provides an ultra-wideband supercontinuum source based on a two-waveband fiber optic laser. The ultra-wideband supercontinuum source comprises a first fiber optic laser, a second fiber optic laser, a wavelength division multiplexer, and a cascaded two-stage supercontinuum evolution assembly. The ultra-wideband supercontinuum source based on the two-waveband fiber optic laser is characterized in that two fiber optic lasers of different wavebands are adopted as seed sources to form the two-waveband fiber optic laser for simultaneously outputting two-waveband laser light, and the two-waveband laser light is used for pumping the cascaded evolution assembly. Specifically, when the two-waveband laser light passes through the first-stage evolution assembly, the laser light of one waveband is evolved into a visible light- near infrared supercontinuum, while the laser light of the other waveband is evolved into an ultrashort pulse, the visible light- near-infrared supercontinuum and the ultrashort pulse are coupled together to go into the second-stage evolution assembly, next, the ultrashort pulse is evolved into a near infrared-intermediate infrared supercontinuum in the second-stage evolution assembly, while the visible light- near-infrared supercontinuum generated in the previous stage is transmitted in the second-stage evolution assembly at low loss, and finally, an ultra-wideband supercontinuum covering three wavebands of visible light, near infrared and intermediate infrared is output from a cascaded optical fiber.

Description

technical field [0001] The invention belongs to the field of optical fiber laser technology, and in particular relates to an ultra-broadband supercontinuum light source based on a dual-band optical fiber laser, which can be applied in biomedicine, remote sensing detection, environmental monitoring, multi-channel optical fiber communication, spectroscopy and the like. Background technique [0002] Fiber-optic supercontinuum light sources can generate high-brightness, high-coherence broadband light, which is equivalent to broadband lasers, and have important application prospects in biomedicine, laser spectroscopy, environmental monitoring, remote sensing and other fields. [0003] Ultra-broadband spectral output is the core goal of supercontinuum research, and the generation of broadband supercontinuum requires that the wavelength of the pump laser be located in the anomalous dispersion region of the fiber and as close as possible to the zero-dispersion wavelength (Zero Disper...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technology of single-band laser pumping a single-material fiber makes it difficult for the supercontinuum to expand simultaneously in the visible and mid-infrared bands, which limits the realization of ultra-broadband supercontinuum covering the three bands of visible-near-infrared-mid-infrared

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