Combined 1.9 mu m wavelength converter of hollow-core photonic crystal fiber and seal cavity

Abstract

The invention relates to a combined 1.9 mu m wavelength converter of a hollow-core photonic crystal fiber and a seal cavity. The wavelength converter comprises a laser, a polarization controller, a hydrogen steel cylinder, a seal cavity, a hollow-core photonic crystal fiber, a fiber collimator, a lens, a gas outlet, a gas inlet, a gas circulating pump, a planar mirror and a light beam splitter. The wavelength converter is characterized in that, the laser and the polarization controller constitute a light source system, and the seal cavity is arranged at the rear part of the light source system; the seal cavity is connected with the hydrogen steel cylinder provided with a pressure-reducing valve; the hollow-core photonic crystal fiber is arranged in the seal cavity; an incident end plane of the fiber is connected with the fiber collimator; the gas outlet, the gas inlet of the seal cavity are connected with the gas circulating pump; finally the lens, the planar mirror and the light beam splitter are arranged at the rear part of the seal cavity. According to the invention, through the excellent non-linear characteristics and mode transmission characteristics of the hollow-core photonic crystal fiber, and pressure intensity modulation of the hydrogen and fluidity of the hydrogen in the seal cavity, the wavelength converter has the advantages of low threshold and high conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics, and in particular relates to a combined hollow-core photonic crystal fiber and sealed cavity 1.9 μm wavelength converter. Background technique [0002] Pulsed laser sources with a wavelength of 1.9 μm are widely used in laser medical treatment, laser ranging, photoelectric countermeasures, infrared radar, infrared remote sensing, and infrared sensing. In medical treatment, laser lithotripsy uses the strong absorption of water in cells to 1.9 μm laser to vaporize water, transfer energy to stones, and then crush stones into powder. The 1.9μm laser has a very shallow penetration depth to human tissue, and the lithotripsy process causes little damage to surrounding tissues, and can achieve non-invasive or minimally invasive effects. Compared with other lithotripsy methods, laser lithotripsy is extremely safe. The high-power 1.9μm laser has the characteristics of fast vaporization cutting sp...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the disadvantage that the conversion efficiency of the existing Raman conversion to obtain a 1.9 μm laser light source is not high, and proposes a hollow-core photonic crystal fiber combined with a pressure-adjustable sealed cavity to form a hollow-core photonic crystal fiber and a sealed cavity. Cavity Combined 1.9μm Wavelength Converter

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