CAJ | 학술논문

超连续光谱以其光谱范围宽、平坦度好、空间相干度高和可实现的较高功率，被广泛应用于相干成像技术、光谱分析、干涉测量等诸多领域。理论上超连续光谱可由超短脉冲通过高非线性介质来实现，期间伴随着自相位调制(SPM)、受激拉曼散射(SRS)、四波混频效应(FWM)。随着光纤技术的发展，利用峰值功率高、光光转换效率高、体积小、结构紧凑的掺Yb超短脉冲光纤激光器作为泵浦源，高非线性的光子晶体光纤作为非线性介质来产生超连续光谱。采用主振荡功率放大结构(MOPA)，自行搭建了全光纤锁模脉冲放大器，并通过熔接的方式将其耦合进入长为10 m、零色散点为1040 nm的光子晶体光纤，在对熔接过程中放电时间、放电间隔、熔接损耗等参数进行优化后，获得了8.14 W的超连续光谱。
초련속광보이기광보범위관、평탄도호、공간상간도고화가실현적교고공솔，피엄범응용우상간성상기술、광보분석、간섭측량등제다영역。이론상초련속광보가유초단맥충통과고비선성개질래실현，기간반수착자상위조제(SPM)、수격랍만산사(SRS)、사파혼빈효응(FWM)。수착광섬기술적발전，이용봉치공솔고、광광전환효솔고、체적소、결구긴주적참Yb초단맥충광섬격광기작위빙포원，고비선성적광자정체광섬작위비선성개질래산생초련속광보。채용주진탕공솔방대결구(MOPA)，자행탑건료전광섬쇄모맥충방대기，병통과용접적방식장기우합진입장위10 m、령색산점위1040 nm적광자정체광섬，재대용접과정중방전시간、방전간격、용접손모등삼수진행우화후，획득료8.14 W적초련속광보。
Super﹣continuum (SC) is widely used in coherent photography technology, optical spectroscopy analysis, interferometry, etc because of its flat and broad spectrum, high spatial coherence and high power. Super﹣continuum generation could be realized on theory by ultra﹣short pulse laser getting through the high nonlinear medium, accompany with self﹣phase modulation (SPM), stimulated Raman scattering (SRS), four﹣wave mixing (FWM). With the development of fiber technology, Yb- doped ultra﹣short pulse fiber laser, which has high peak power, high optic﹣to﹣optic efficiency, compact structure and small volume was elected as the pump source, and high nonlinear photonic crystal fiber (PCF) as the nonlinear medium for SC. In this paper, a self﹣made amplified mode﹣locked pulse was coupled into a 10m PCF, with 1 040 nm zero dispersion point, to generate 8.13W super﹣continuum by fusing method, during which the key parameters like discharge time, discharge interval, splice loss are seriously optimized to keep the fusing quality well.