Wide tuning intermediate infrared laser based on hollow-core optical fiber flexible transmission

Abstract

The invention discloses a wide tuning mid-infrared laser based on hollow-core optical fiber flexible transmission, and belongs to the technical field of optics and laser photoelectronics. Comprising an optical fiber laser light source (1), a first half-wave plate (2), a thin film polarizer (3), a second half-wave plate (4), a first focusing lens (5), a multi-period PPLN crystal (6), a first collimating lens (7), an infrared optical filter (8), a first reflecting mirror (9), a second reflecting mirror (10), a second focusing lens (11), a hollow-core optical fiber (12) and a second collimating lens (13) which are arranged in sequence and connected in sequence through an optical path. The intermediate infrared laser generating device can generate intermediate infrared laser in a wide tuning range, is combined with the hollow-core optical fiber in a system integration mode, enables the laser to enter a fiber core of the hollow-core optical fiber in a coupling mode, and utilizes the unique advantages of low delay, low dispersion, wide light guide passband and high damage threshold of the hollow-core optical fiber to carry out low-loss flexible transmission on the generated intermediate infrared laser in the wide tuning range.

Description

technical field [0001] The invention belongs to the technical field of optics and laser optoelectronics, and in particular relates to a wide-tunable mid-infrared laser based on hollow-core optical fiber flexible transmission. Background technique [0002] The mid-infrared laser is called the "molecular fingerprint area" at 2-5 μm, which contains the absorption peaks of many gas molecules, and has important application value in the fields of military countermeasures, environmental monitoring, radar, biomedicine, and spectral research. At present, the generation methods of mid-infrared lasers mainly include quantum cascade lasers and interband cascade lasers, lead salt semiconductor lasers and gallium antimonide lasers, gas lasers, chemical lasers, optical parametric oscillators, free electron lasers, solid-state lasers, and fiber lasers. Wait. The generation scheme of mid-infrared ultrashort pulse with high peak power and wide tuning range has become a research hotspot in th...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to establish a wide-tunable mid-infrared laser based on flexible transmission of hollow-core optical fiber. On the premise of realizing wide-tunable mid-infrared laser, the mid-infrared laser is combined with hollow-core optical fiber through system integration at the same time. It solves the problem that the mid-infrared laser is difficult to transmit stably, flexibly and efficiently. Only one system can realize the flexible transmission of the mid-infrared laser with a wide tuning range, and the system structure is simple and efficient.

Solve the problem that mid-infrared laser is difficult to apply to military photoelectric countermeasures and laser medical surgery

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