All-fiber high-power middle- and far-infrared super-continuum spectrum light source

Abstract

The invention discloses an all-fiber high-power middle- and far-infrared super-continuum spectrum light source. The all-fiber high-power middle- and far-infrared super-continuum spectrum light source is characterized by comprising a thulium doped mode-locking fiber laser module, a thulium doped fiber amplification module, a first super-continuum (SC) spectrum generation module and a second SC spectrum generation module which are sequentially arranged, wherein the thulium doped mode-locking fiber laser module is used for generating a high-repeated frequency ultrashot pulse picoseconds or femtosecond, the thulium doped fiber amplification module is used for generating a high-power and high-order soliton pulse, the first SC spectrum generation module is used for generating high-power SC spectrum laser of 2-5 micrometers, the second SC spectrum generation module is used for generating high-power SC spectrum laser of 2-14 micrometers, and the thulium doped mode-locking fiber laser module, the thulium doped fiber amplification module, the first SC spectrum generation module and the second SC spectrum generation module all employ single-mode fibers. The all-fiber high-power middle- and far-infrared super-continuum spectrum light source has the advantages of low cost, high conversion efficiency, good output beam quality, wide bandwidth, simple and compact structure and high adaptive capacity to an environment.

Description

technical field [0001] The invention relates to the technical field of laser optoelectronics, in particular to an all-fiber high-power mid-to-far infrared supercontinuum light source. Background technique [0002] According to the division of atmospheric light transmission, the atmospheric window is mainly divided into visible light and near-infrared bands (0.3-1.3 μm, 1.5-1.8 μm), mid-infrared bands (3.5-5.5 μm), far-infrared bands (8-14 μm) and microwave bands (0.8~2.5cm), etc. The infrared band located in the long-wave direction of the visible vision of the human eye has special military and civilian values. In particular, the mid-to-far infrared band is not only the atmospheric window with the smallest attenuation, but also covers the absorption peaks of many atoms and molecules. The "fingerprint" identification area is also the light wave spectrum area corresponding to the black body radiation of room temperature or high temperature objects. Therefore, light sources i...

AI Technical Summary

Problems solved by technology

[0003] At present, the mid-to-far infrared SC spectrum laser source mainly uses an optical parametric oscillator (OPO) or an optical parametric amplifier (OPA) with high peak power to pump the chalcogenide fiber to achieve mid-to-far infrared SC spectrum output. The large size of the source greatly limits the application of the light source, and its output power is extremely low, generally limited to the order of microwatts, which is basically not practical

Images