This paper presents a new technique for flat optical frequency comb （OFC） generation, which is based on the nonlinear process of multiple four-wave mixing （FWM） effects. The nonlinear effects are significantly enh...This paper presents a new technique for flat optical frequency comb （OFC） generation, which is based on the nonlinear process of multiple four-wave mixing （FWM） effects. The nonlinear effects are significantly enhanced by using the proposed optical feedback scheme consisting of a single mode fiber （SMF）, two highly nonlinear fibers （HNLFs） with different zero dispersion wavelengths （ZDWs） and polarization beam splitters （PBSs）. Simulation results illustrate its efficiency and applicability of expanding a comb to 128 coherent lines spaced by only 20GHz within 6-dB power deviation.展开更多
Picosecond pulse pumped supercontinuum generation in photonic crystal fiber is investigated by performing a series of comparative experiments. The main purpose is to investigate the supercontinuum generation processes...Picosecond pulse pumped supercontinuum generation in photonic crystal fiber is investigated by performing a series of comparative experiments. The main purpose is to investigate the supercontinuum generation processes excited by a given pump source through the experimental study of some specific fibers. A 20-W all-fiber picosecond master oscillator-power amplifier （MOPA） laser is used to pump three different kinds of photonic crystal fibers for supercontinuum generation. Three diverse supercontinuum formation processes are observed to correspond to photonie crystal fibers with distinct dis- persion properties. The experimental results are consistent with the relevant theoretical results. Based on the above analyses, a watt-level broadband white light supercontinuum source spanning from 500 nm to beyond 1700 nm is demonstrated by using a picosecond fiber laser in combination with the matched photonic crystal fiber. The limitation of the group velocity matching curve of the photonic crystal fiber is also discussed in the paper.展开更多
基金This work was supported by the National Science Foundation of China （NSFC 61307088） and the Fundamental Research Funds for the Central Universities （ZYGX2012J008）. This work was supported by the National Natural Science Foundation of China （Nos. 61307088, 61205067, and 61505020） and the National Defense Pre-Research Foundation of China （9140A02050413DZ02023）.
文摘This paper presents a new technique for flat optical frequency comb （OFC） generation, which is based on the nonlinear process of multiple four-wave mixing （FWM） effects. The nonlinear effects are significantly enhanced by using the proposed optical feedback scheme consisting of a single mode fiber （SMF）, two highly nonlinear fibers （HNLFs） with different zero dispersion wavelengths （ZDWs） and polarization beam splitters （PBSs）. Simulation results illustrate its efficiency and applicability of expanding a comb to 128 coherent lines spaced by only 20GHz within 6-dB power deviation.
基金supported by the State Key Program of the National Natural Science Foundation of China(Grant No.61235008)the Postgraduate Innovation Foundation of National University of Defense Technology,China(Grant No.B110704)
文摘Picosecond pulse pumped supercontinuum generation in photonic crystal fiber is investigated by performing a series of comparative experiments. The main purpose is to investigate the supercontinuum generation processes excited by a given pump source through the experimental study of some specific fibers. A 20-W all-fiber picosecond master oscillator-power amplifier （MOPA） laser is used to pump three different kinds of photonic crystal fibers for supercontinuum generation. Three diverse supercontinuum formation processes are observed to correspond to photonie crystal fibers with distinct dis- persion properties. The experimental results are consistent with the relevant theoretical results. Based on the above analyses, a watt-level broadband white light supercontinuum source spanning from 500 nm to beyond 1700 nm is demonstrated by using a picosecond fiber laser in combination with the matched photonic crystal fiber. The limitation of the group velocity matching curve of the photonic crystal fiber is also discussed in the paper.
