Results 81 to 90 of about 1,682 (221)

Direct generation of optical frequency combs in χ(2) nonlinear cavities

Nanophotonics, 2016
Quadratic nonlinear processes are currently exploited for frequency comb transfer and extension from the visible and near infrared regions to other spectral ranges where direct comb generation cannot be accomplished.
Mosca Simona, Ricciardi Iolanda, Parisi Maria, Maddaloni Pasquale, Santamaria Luigi, De Natale Paolo, De Rosa Maurizio   +6 more
doaj   +1 more source

Twenty‐Year Progress in Landscape Genetics of Tetrapods

Ecology and Evolution, Volume 16, Issue 8, August 2026.
Geographic distribution of tetrapod landscape genetics between 2003 and 2025. ABSTRACT Landscape genetics, an interdisciplinary field integrating population genetics, landscape ecology, and spatial analytical techniques, has progressed significantly over two decades, yet systematic reviews of its application to tetrapods remain limited. Here, we review
Tongtong Gu, Xing Jia, Yuxin He, Zixin Lin   +3 more
wiley   +1 more source

Universal Dynamics of Kerr-Frequency Comb Formation in Microresonators [PDF]

Conference on Lasers and Electro-Optics 2012, 2012
Optical frequency combs allow for precise measurement of optical frequencies and are used in a growing number of applications beyond spectroscopy and optical frequency metrology. A class of compact microresonator based frequency comb generators has emerged recently based on (hyper)-parametric frequency conversion, mediated by the Kerr-non-linearity, of
Herr, T., Hartinger, K., Riemensberger, J., Wang, C. Y., Gavartin, E., Holzwarth, R., Gorodetsky, M. L., Kippenberg, T. J.   +7 more
openaire   +3 more sources

Octave‐Spanning, Deterministic Single Soliton Generation in 4H‐Silicon Carbide‐On‐Insulator Microring Resonators

Laser &Photonics Reviews, Volume 20, Issue 15, 7 August 2026.
The miniaturization of metrology and precision spectroscopy systems requires robust, turn‐key microcombs with broad bandwidth, low threshold, and high efficiency. Here, high‐Q, dispersion‐engineered microresonators in a high‐confinement nonlinear SiC platform, combined with waveguide‐enabled thermal management and laser cooling, enable deterministic ...
Yi Zheng, Liping Zhou, Chengli Wang, Yanjing Zhao, Ailun Yi, Kresten Yvind, Xin Ou, Minhao Pu   +7 more
wiley   +1 more source

Frequency comb generation via synchronous pumped χ(3) resonator on thin-film lithium niobate

Nature Communications
Resonator-based optical frequency comb generation is an enabling technology for a myriad of applications ranging from communications to precision spectroscopy.
Rebecca Cheng, Mengjie Yu, Amirhassan Shams-Ansari, Yaowen Hu, Christian Reimer, Mian Zhang, Marko Lončar   +6 more
doaj   +1 more source

High-power 55-fs Yb:YAG thin-disk oscillator at 200 MHz repetition rate

Frontiers in Physics, 2022
High-repetition-rate ultrafast laser oscillators with high average power and short pulse duration provide excellent sources for generating optical frequency combs.
Heyan Liu, Tingting Yang, Jia Xu, Qing Wang, Hongwen Xuan, Jinwei Zhang   +5 more
doaj   +1 more source

Broadband Parametric Amplification in AlGaAs‐on‐Insulator Nanowaveguides

Laser &Photonics Reviews, Volume 20, Issue 16, 21 August 2026.
Harnessing the exceptional nonlinearity of AlGaAs‐on‐insulator nanowaveguides, four‐wave‐mixing parametric amplification achieves a record net on‐chip gain of 56 dB and a gain bandwidth exceeding 415 nm at telecom wavelengths. These results establish AlGaAsOI as a powerful platform for compact, high‐performance integrated nonlinear optical ...
Yanjing Zhao, Chanju Kim, Yi Zheng, Chaochao Ye, Yueguang Zhou, Kresten Yvind, Minhao Pu   +6 more
wiley   +1 more source

Self-Referenced, Chipscale Kerr Frequency Comb without External Broadening [PDF]

A Kerr frequency comb generated in an integrated silicon nitride microresonator is self-referenced using the 2f-3f approach. With an intrinsic bandwidth of two-thirds of an octave no additional, external broadening of the spectrum is required ...
Jost, John D., Brasch, Victor, Lucas, Erwan, Geiselmann, Michael, Kippenberg, Tobias J.   +4 more
core   +1 more source

Deterministic generation of single soliton Kerr frequency comb in microresonators by a single shot pulsed trigger [PDF]

, 2017
Kerr soliton frequency comb generation in monolithic microresonators recently attracted great interests as it enables chip-scale few-cycle pulse generation at microwave rates with smooth octave-spanning spectra for self-referencing.
Chongxiu Yu (3984092), Jinhui Yuan (3985676), Feng Li (30515), K. Nakkeeran (17500779), Qiang Wu (31071), Zhe Kang (10324121), P. K. A. Wai (3943562), J. Nathan Kutz (7163921)   +7 more
core   +1 more source

Dress for success: climate pressures predict fur insulation and body size in natural and reintroduced populations of a threatened marsupial

Oikos, Volume 2026, Issue 8, August 2026.
Phenotypic variation in functional traits underpins responses to environmental gradients, influencing thermoregulation, energy balance, and long‐term persistence under climate extremes. Climate change is altering these gradients globally, yet in species that have already disappeared from much of their range, adaptive phenotypes may have also been lost,
Jack Bilby, Kenny J. Travouillon, Emma Sherratt, William K. Cornwell, Katherine Moseby   +4 more
wiley   +1 more source