Visible light generation in the cladding of optica fibers carrying near-infrared continuous-wave lasers due to Cherenkov-phase matched harmonic conversion

被引：7

作者：

Aparanji, Santosh ^{[1
]}

Arun, S. ^{[1
]}

Balaswamy, V ^{[1
]}

Supradeepa, V. R. ^{[1
]}

机构：

[1] Indian Inst Sci, Ctr Nano Sci & Engn CeNSE, Bangalore 560012, Karnataka, India

来源：

OPTICS LETTERS | 2020年 / 45卷 / 04期

关键词：

2ND-HARMONIC GENERATION; HIGH-POWER; STANDARD;

D O I：

10.1364/OL.384581

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, we report and analyze the cause of the surprising observation of visible light generation in the cladding of silica-based continuous-wave (CW), near-infrared fiber lasers. We observe a visible rainbow of hues in a cascaded. Raman fiber laser, which we attribute to second and third. harmonic conversion of the different wavelength components propagating in the core of the fiber. The light in the cladding of the fiber occurs through Cherenkov-type phase matching, and a mathematical analysis is presented to estimate the power of the harmonic light generated. We then extend this theory to visible light generation in other types of fiber lasers. Specifically, we analyze the case of a CW supercontinuum generated in standard telecom fibers, and verify our theoretical predictions with experimental results through visible spectra collected. (C) 2020 Optical Society of America

引用

页码：993 / 996

页数：4

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