High power frequency changer of small core radial bundling type high non-linear photon crystal optical fiber

Abstract

The invention discloses a high power frequency converter of small core diameter beaming high non-linear photonic crystal fiber, which belongs to a high power ultra continual Laser Technology in the laser field. The converter is composed of a single high power pulse laser, a non-spherical surface collimation beam expander or micro-lens array, the small core diameter beaming high non-linear photonic crystal fiber, a non-spherical surface focusing lens or micro-lens array and big model field photonic crystal fiber. Or the converter is composed of the single high power pulse laser, the non-spherical surface collimation beam expander or micro-lens array, the small core diameter beaming high non-linear photonic crystal fiber and the big model field photonic crystal fiber. The converter of the invention has the advantages of having the ultra continual laser output capacity of above dozens of watt.

Description

technical field [0001] The invention relates to a high-power frequency converter of a small-core-diameter clustered high-nonlinear photonic crystal fiber, which belongs to the high-power supercontinuous laser light source technology in the laser field. Background technique [0002] Supercontinuum laser source (white light laser) is a kind of laser source with wide spectral distribution, and the resulting spectral resolution technology has been widely used in optical communication, life science, military and other fields. The core of a supercontinuum laser source is frequency conversion, that is, the ultrashort pulse passes through a nonlinear medium to achieve spectral broadening. There are three main types of materials used for frequency conversion of supercontinuum laser sources: liquid solvents, bulk media, and optical fibers [1]. The former has gradually faded out of people's vision due to the inconvenience of liquid materials in practical use; block media (white sapph...

AI Technical Summary

Problems solved by technology

[0003]However, there are obvious disadvantages in using a single small core diameter photonic crystal fiber for frequency conversion, that is, the small core diameter (small area) of the fiber cannot withstand higher incident laser light power, thus making the output power of the supercontinuum laser source lower

This leads to a pair of contradictions, that is, frequency conversion requires high nonlinearity, that is, a small core diameter of the fiber, and a large fiber core diameter is required to withstand high incident power (that is, high output power).

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