Dual combs are an emerging tool to obtain unprecedented resolution, high sensitivity, ultrahigh accuracy, broad bandwidth, and ultrafast data updating rate in the fields of molecular spectroscopy, optical metrology, a...Dual combs are an emerging tool to obtain unprecedented resolution, high sensitivity, ultrahigh accuracy, broad bandwidth, and ultrafast data updating rate in the fields of molecular spectroscopy, optical metrology, as well as optical frequency synthesis. The recent progress in chip-based microcombs has promoted the on-chip dual-comb measuring systems to a new phase attributed to the large frequency spacing and broad spectrum. In this paper, we demonstrate proof-of-concept dual-comb generation with orthogonal polarization in a single microresonator through pumping both the transverse-electric （TE） and transverse-magnetic （TM） modes simultaneously. The two orthogonal polarized pumps are serf-oscillating in a fiber ring cavity. The generated dual comb exhibits excellent stability due to the intrinsic feedback mechanism of the sdf-locked scheme. The repetition rate of the two orthogonal combs is slightly different because of the mode spacing difference between the TE and TM modes. Such orthogonal polarized dual-combs could be a new comb source for out-of-lab applications in the fields of integrated spectroscopy, ranging measurement, optical frequency synthesis, and microwave comb generation.展开更多
We propose and experimentally demonstrate an ultra-fiat optical frequency comb （OFC） generator by a bal- anced driven dual parallel Mach-Zehnder modulator. Five- and seven-tone OFC with exactly equal intensity can b...We propose and experimentally demonstrate an ultra-fiat optical frequency comb （OFC） generator by a bal- anced driven dual parallel Mach-Zehnder modulator. Five- and seven-tone OFC with exactly equal intensity can be generated theoretically, Experimentally obtained five- and seven-tone OFC with flatness of 0.6 and 1.26 dB are demonstrated, respectively, which agrees well with the theoretical results.展开更多
基金National Natural Science Foundation of China(NSFC)(61475188,61605151,61635013,61675231)Strategic Priority Research Program,Chinese Academy of Sciences(CAS)(XDB24030600)
文摘Dual combs are an emerging tool to obtain unprecedented resolution, high sensitivity, ultrahigh accuracy, broad bandwidth, and ultrafast data updating rate in the fields of molecular spectroscopy, optical metrology, as well as optical frequency synthesis. The recent progress in chip-based microcombs has promoted the on-chip dual-comb measuring systems to a new phase attributed to the large frequency spacing and broad spectrum. In this paper, we demonstrate proof-of-concept dual-comb generation with orthogonal polarization in a single microresonator through pumping both the transverse-electric （TE） and transverse-magnetic （TM） modes simultaneously. The two orthogonal polarized pumps are serf-oscillating in a fiber ring cavity. The generated dual comb exhibits excellent stability due to the intrinsic feedback mechanism of the sdf-locked scheme. The repetition rate of the two orthogonal combs is slightly different because of the mode spacing difference between the TE and TM modes. Such orthogonal polarized dual-combs could be a new comb source for out-of-lab applications in the fields of integrated spectroscopy, ranging measurement, optical frequency synthesis, and microwave comb generation.
文摘We propose and experimentally demonstrate an ultra-fiat optical frequency comb （OFC） generator by a bal- anced driven dual parallel Mach-Zehnder modulator. Five- and seven-tone OFC with exactly equal intensity can be generated theoretically, Experimentally obtained five- and seven-tone OFC with flatness of 0.6 and 1.26 dB are demonstrated, respectively, which agrees well with the theoretical results.
