首页|Picosecond gain-switched polymer fiber random lasers

Picosecond gain-switched polymer fiber random lasers

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Random lasers are a type of lasers that lack typical resonator structures,offering benefits such as easy integration,low cost,and low spatial coherence.These features make them popular for speckle-free imaging and random number gen-eration.However,due to their high threshold and phase instability,the production of picosecond random lasers has still been a challenge.In this work,we have developed three dyes incorporating polymer optical fibers doped with various scat-tering nanoparticles to produce short-pulsed random fiber lasers.Notably,stable picosecond random laser emission lasting 600 ps is observed at a low pump energy of 50 μJ,indicating the gain-switching mechanism.Population inversion and gain undergo an abrupt surge as the intensity of the continuously pumped light nears the threshold level. When the intensity of the continuously pumped light reaches a specific value,the number of inversion populations in the"scattering cavity"surpasses the threshold rapidly.Simulation results based on a model that considers power-dependent gain saturation confirmed the above phenomenon.This research helps expand the understanding of the dynamics behind random medium-stimulated emission in random lasers and opens up possibilities for mode locking in these systems.

random laserpolymer optical fibergain-switched laserpicosecond pulse

杜文彧、高森、张晓娟、李思祺、蒯雁、王治强、曹志刚、徐峰、刘宇、徐林、张俊喜、谢康、俞本立、胡志家

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Information Materials and Intelligent Sensing Laboratory of Anhui Province,Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education,School of Physics and 0pto-electronics Engineering,Anhui University,Hefei 230601,China

School of Instrument Science and 0pto-electronics Engineering,Laboratory of 0ptical Fibers and Micro-nano Photonics,Hefei University of Technology,Hefei 230009,China

School of 0pto-electronic Engineering,Zaozhuang University,Zaozhuang 277160,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaExcellent Scientific Research and Innovation Team of Anhui ProvinceKey Research and Development Plan of Anhui ProvinceInnovation Project for the Returned Overseas Scholars of Anhui ProvinceUniversity Synergy Innovation Program of Anhui ProvinceAnhui Young Wanjiang Scholars Talent Project

121740021187401211874126517711862022AH010003202104a050200592021LCX011GXXT-2020-052Z010118167

2024

10.3788/COL202422.040603

中国光学快报(英文版)
中国光学学会 中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD
影响因子：1.305
ISSN：1671-7694
年,卷(期)：2024.22(4)