Reconfigurable time-stretched swept laser source with up to 100 MHz sweep rate,100 nm bandwidth,and 100 mm OCT imaging range  

作　　者：DONGMEI HUANG FENG LI CHAO SHANG ZIHAO CHENG P.K.A.WAI 

机构地区：[1]Photonics Research Centre,Department of Electronic and Information Engineering,The Hong Kong Polytechnic University,Hong Kong SAR,China [2]The Hong Kong Polytechnic University Shenzhen Research Institute,Shenzhen 518057,China [3]Photonics Research Centre,Department of Electrical Engineering,The Hong Kong Polytechnic University,Hong Kong SAR,China [4]Key Laboratory of Luminescence and Optical Information,Ministry of Education,School of Science,Beijing Jiaotong University,Beijing 100044,China

出　　处：《Photonics Research》2020年第8期1360-1367,共8页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2019YFB1803900);Science,Technology and Innovation Commission of Shenzhen Municipality(SGDX2019081623060558);Research Grants Council,University Grants Committee of Hong Kong SAR(PolyU152241/18E,PolyU152471/16E);The Hong Kong Polytechnic University(1-BBAJ,1-ZVGB).

摘　　要：The sweep rate,sweep range,and coherence length of swept sources,respectively,determine the acquisition rate,axial resolution,and imaging range of optical coherence tomography(OCT).In this paper,we demonstrate a reconfigurable high-speed and broadband swept laser by time stretching of a flat spectrum femtosecond pulse train with over 100 nm bandwidth and a repetition rate of 100 MHz.By incorporating an optical modulator and utilizing appropriate dispersive modules,the reconfiguration of the swept source is demonstrated with sweep rates of 25 and 2.5 MHz.The 2.5 MHz swept source enables an imaging range of>110 mm with 6 dB sensitivity rolloff in OCT,which is the longest imaging range ever reported for megahertz OCT.

关 键 词：laser MODULATOR SOURCE 

分 类 号：TN24[电子电信—物理电子学]