An ultra-broadband mid-infrared fiber optic hyperluminescent emitter

Abstract

The invention relates to the mid-infrared laser technology field and especially relates to a ultra-wide-band mid-infrared optical fiber superfluorescence emitter. The emitter comprises a first laser pumping source, a second laser pumping source, a first rare earth ion doped fiber, a second rare earth ion doped fiber, a first fiber bragg grating and a second fiber bragg grating. A combined beam interchange position of the first laser pumping source and the second laser pumping source is successively provided with a dichroic mirror and a plano-convex lens. An output optical path of the plano-convex lens is provided with the first rare earth ion doped fiber. The first rare earth ion doped fiber is welded with the second rare earth ion doped fiber. A butt joint position of the first rare earth ion doped fiber and the plano-convex lens is provided with a 8-degree angle cutting end surface. The first fiber bragg grating is arranged behind the 8-degree angle cutting end surface. An output terminal of the second rare earth ion doped fiber is provided with the 8-degree angle cutting end surface. The second fiber bragg grating is arranged at a position which is in front of the 8-degree angle cutting end surface on the output terminal of the second rare earth ion doped fiber. A system structure is greatly simplified.

Description

technical field [0001] The invention relates to the technical field of mid-infrared lasers, in particular to an ultra-broadband mid-infrared optical fiber super-fluorescent emitter. Background technique [0002] The 2-20 μm mid-infrared band not only includes two important atmospheric transmission windows, but also covers the absorption peaks of many molecules, atoms, and chemical bonds. It has important application prospects. As a new type of laser, fiber laser has a series of advantages such as high conversion efficiency, good heat dissipation, good beam quality, and easy integration compared with traditional lasers such as solid-state lasers, gas lasers, and semiconductor lasers. Therefore, the development of high-performance lasers The mid-infrared wide-spectrum fiber optic light source has important scientific significance and application value. In 2014, C.R.Petersen of the Technical University of Denmark and others used ultra-short pulse lasers with wavelengths of 4....

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Problems solved by technology

[0003] The embodiment of the present invention provides an ultra-broadband mid-infrared optical fiber superfluorescent emitter, which solves the problem of using high peak power, ultra-short pulse pump source and high nonlinearity when obtaining an ultra-broadband mid-infrared light source in the prior art. Fiber optics, technical issues with complex system structures

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