Intermediate infrared super-continuum spectrum laser light source

Abstract

The invention provides an intermediate infrared super-continuum spectrum laser light source. The intermediate infrared super-continuum spectrum laser light source includes a first laser seed source, a second laser seed source, a first laser pumping source, a second laser pumping source, a firs pump combiner, a second pump combiner, an erbium-doped gain optical fiber, a thulium-doped gain optical fiber, a coupler and a sulfide photonic crystal optical fiber; the firs pump combiner combines light outputted by the first laser seed source and the first laser pumping source into pulsed laser which is amplified by the erbium-doped gain optical fiber; the second pump combiner combines light outputted by the second laser seed source and the second laser pumping source into pulsed laser which is amplified by the erbium-doped gain optical fiber; the coupler combines the two beams of pulsed laser into dual-wavelength laser and couples the dual-wavelength laser into the sulfide photonic crystal optical fiber, so that intermediate infrared super-continuum spectrum laser can be outputted; and the sulfide photonic crystal optical fiber includes an annular wrapping layer and a fiber core arranged at the center of the annular wrapping layer, wherein the fiber core is connected with the annular wrapping layer through supporting arms. With the intermediate infrared super-continuum spectrum laser light source of the invention adopted, the spectral range of the intermediate infrared super-continuum spectrum laser can be extended.

Description

technical field [0001] The invention relates to the technical field of mid-infrared lasers, in particular to a mid-infrared supercontinuum laser light source. Background technique [0002] Usually, the spectral segment with higher transmittance when sunlight passes through the atmosphere is called the atmospheric window. The spectral bands of the atmospheric window mainly include: microwave band (300-1GHz / 0.8-2.5cm), mid-far infrared band (8-14μm), mid-infrared band (3.5-5.5μm), near ultraviolet, visible light and near-infrared band (0.3 -1.3μm / 1.5-1.8μm). [0003] At present, lasers in the mid-infrared and mid-to-far infrared bands can be used for infrared tracking, jamming, search target navigation, and optical remote sensing detection, which is of vital significance to national security. Due to the shortage of narrow-bandgap semiconductor materials and other reasons, there is currently a severe shortage of high-efficiency emitting light sources and lasers at mid-infrare...

AI Technical Summary

Problems solved by technology

At present, the use of optical parametric oscillation method, difference frequency oscillation, quantum cascade laser and gas laser can realize low-power mid-infrared band laser output, but these implementation methods all use a single pump light, and the spectral range of the output mid-infrared laser is relatively large. Small, complex structure requiring multi-stage amplification, bulky, inconvenient to use, thus limiting its application

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