掺镱双包层光纤激光器内腔倍频绿光实验研究(英文)-豆柴文库

您所在位置：网站首页 / 掺镱双包层光纤激光器内腔倍频绿光实验研究(英文).docx / 文档详情

在线预览结束，喜欢就下载吧，查找使用更方便

5 金币

下载文档

/ 2

下载提示

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

文本预览

掺镱双包层光纤激光器内腔倍频绿光实验研究(英文)
Researchonfrequencydoublinggreenlightinsidethecavityofthulium-dopeddouble-cladfiberlaser
1.Introduction
Fiberlasershavebecomeoneofthemostinfluentialcategoriesoflasersystemsinscientificandindustrialapplications.Thefiberlasershaveadvantagesofhighefficiency,compactsize,andhigh-qualityoutputbeam,amongothers.Thulium-dopeddouble-cladfiberlasershavebeenwidelyusedinmedicalandindustrialapplications,suchasdermatology,materialprocessing,andsolid-statelighting.Inthispaper,weintroduceafrequencydoublingexperimentusingthulium-dopeddouble-cladfiberlaserasthefundamentallasersource.
2.Frequencydoublingprinciple
Frequencydoublingisaprocessofconvertingafundamentallaserwavelengthtoitssecond-harmonicwavelength.Itisanimportantprocessinlaserphysicsandtechnology.Thenonlinearopticalcrystalisthekeycomponentinthefrequency-doublingprocess.Thiscrystalhasahighnonlinearcoefficient,whichenablesastronginteractionbetweenthecrystalandthefundamentallaser.Theconversionefficiencyofthefrequencydoublingprocessisproportionaltothesquareofthefundamentallaserintensity.
3.Experimentalsetup
Athulium-dopeddouble-cladfiberlaserwasusedasthefundamentallasersourceinourexperiment.Thelasercavitywasformedbya5-meter-longthulium-dopeddouble-cladfiberandtwofiberBragggratings.Thecentralwavelengthofthefiberlaserwas1.95μm,andtheoutputpowerwasabout2W.A10-mm-longperiodicallypoledlithiumniobate(PPLN)crystalwasusedasthefrequency-doublingcrystal.ThePPLNcrystalwasdesignedfortypeIphase-matching,anditsgratingperiodwas24.5μm.
Thefrequency-doublingsetupwasplacedinsideatemperature-controlledchambertomaintainastablecrystaltemperature.Thefrequency-doubledgreenlight(λ=977nm)wasmonitoredbyapowermeterandanopticalspectrumanalyzer.Theconversionefficiencyofthefrequency-doublingprocesswascalculatedbycomparingtheoutputpowerofthefrequency-doubledgreenlightwiththeinputpowerofthefundamentallaser.
4.Experimentalresults
Toinvestigatetheoptimalperformanceofthefrequency-doublingprocess,wevariedthecrystaltemperatureandthefundamen