Author Affiliations
Abstract
1 State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
2 Center of Materials Science and Opto-Electronic Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 State Key Laboratory of Integrated Optoelectronics, College of Electronic Science & Engineering, Jilin University, Changchun 130012, China
4 National Key Laboratory of Science and Technology on Electronic Test and Measurement, the 41st Research Institute, China Electronics Technology Group Corporation, Qingdao 266555, China
The generation of high-repetition rate (frep ≥ 10 GHz) ultra-broadband optical frequency combs (OFCs) at 1550 nm and 1310 nm is investigated by seeding two types of highly nonlinear fibers (HNLFs) with 10 GHz picosecond pulses at the pump wavelength of 1550 nm. When pumped near the zero dispersion wavelength (ZDW) in the normal dispersion region of a HNLF, 10 GHz flat-topped OFC with 43 nm bandwidth within 5 dB power variation is generated by self-phase modulation (SPM)-based OFC spectral broadening at 26.5 dBm pump power, and 291 fs pulse trains with 10 GHz repetition rate are obtained at 18 dBm pump power without complicated pulse shaping methods. Furthermore, when pumped in the abnormal dispersion region of a HNLF, OFCs with dispersive waves around 1310 nm are studied using a common HNLF and fluorotellurite fibers, which maintain the good coherence of the pump light at 1550 nm. At the same time, sufficient tunability of the generated dispersive waves is achieved when tuning the pump power or ZDW.
optical comb electro-optic devices ultrafast optics optical pulses nonlinear optics Opto-Electronic Advances
2020, 3(7): 07190033
设计了一种四电极八边形结构的铌酸锂电光偏转器。仿真分析了四电极八边形结构和理想电极结构偏转器的电场分布特性,讨论了结构参数对偏转器电场分布、场强梯度和有效通光口径比的影响,并给出了四电极八边形偏转器结构参数的选取方法。仿真结果表明,在相同的晶体和施加电压下,近轴区域内四电极八边形结构与理想电极结构偏转器的电场分布一致,场强误差小于10%。根据分析结果,制备了八边形铌酸锂晶体电光偏转器。实验结果表明,该偏转器的偏转灵敏度为0.312 μrad/V,与理论计算结果(0.340 μrad/V)相吻合。
电光器件 电光偏转器 电场分析 电光效应 电场强度梯度 偏转灵敏度 激光与光电子学进展
2020, 57(15): 152302
