Dual-wavelength Q-switched pulse fiber laser

Abstract

The invention provides a dual-wavelength Q-switched pulse fiber laser comprising a first laser pump source, a second laser pump source, a light beam combination device, a diachronic mirror, a coupling lens, a dual-cladding Er <3+>-doped ZBLAN fiber, a first collimating lens, a focusing lens, an equivalent saturable absorber, a second collimating lens, and a high reflector. The light beam combination device, the diachronic mirror, the coupling lens, the dual-cladding Er <3+>-doped ZBLAN fiber, the first collimating lens, the focusing lens, the equivalent saturable absorber, the second collimating lens, and the high reflector are connected in sequence. The first laser pump source and the second laser pump source are connected with the light beam combination device. The reflection wavelength of the high reflector is 3 to 5 microns. The high reflector and the front end surface of the dual-cladding Er <3+>-doped ZBLAN fiber form a laser resonance cavity; and in the dual-cladding Er <3+>-doped ZBLAN fiber, the energy level transition of the Er <3+> ion corresponds to transition radiation of the wavelength of 3.2 to 3.9 microns, thereby realizing output of high-power pulse laser with the wavelength larger than 3 microns. On the basis of the way, a problem that the traditional fiber laser uses a single wavelength pump source and thus laser with the wavelength larger than 3 microns can not be generated easily can be solved.

Description

technical field [0001] The invention relates to the field of mid-infrared laser technology, in particular to a dual-wavelength Q-switched pulse fiber laser. Background technique [0002] Mid-infrared pulsed laser sources with a wavelength range of 3-5 μm are used in national defense (such as: infrared directional interference), biomedicine (such as: minimally invasive surgery), special material processing (such as: glass, ceramics, organic polymers, etc.), atmospheric light Communication and other fields have important application prospects. Fiber lasers have significant advantages such as high brightness, high peak power, tunability, low laser threshold, good output beam quality, high conversion efficiency, high "surface area / volume" ratio, good flexibility and flexibility, and easy integration. Therefore, the development The 3-5μm mid-infrared pulsed fiber laser has important scientific significance and application value. [0003] At present, there are three main ways to...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide a dual-wavelength pumped Q-switched pulsed fiber laser, which can solve the problem that traditional fiber lasers are difficult to generate lasers with a wavelength greater than 3 μm using a single-wavelength pump source

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