Results 41 to 50 of about 5,482 (285)
Recent advances in ultrafast optical parametric oscillator frequency combs
, 2014 We discuss recent advances in the stabilization and application of femtosecond frequency combs based on optical parametric oscillators (OPOs) pumped by femtosecond lasers at 800 and 1060 nm.
Reid, Derryck T.; id_orcid +2 more
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Microresonator frequency comb optical clock
Optica, 2014 Optical-frequency combs enable measurement precision at the 20th digit, and accuracy entirely commensurate with their reference oscillator. A new direction in experiments is the creation of ultracompact frequency combs by way of nonlinear parametric optics in microresonators.
Papp, Scott B. +6 more
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Spectral line-by-line pulse shaping of on-chip microresonator frequency combs
, 2011 Recently, on-chip comb generation methods based on nonlinear optical modulation in ultrahigh-quality-factor monolithic microresonators have been demonstrated, where two pump photons are transformed into sideband photons in a four-wave-mixing process ...
Lei Chen +15 more
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Research Progress of Microresonator-Based Optical Frequency Combs
, 2021 Optical frequency combs are composed of a series of discrete and equidistant coherent lasers. Optical frequency combs can be used as a high-precision optical frequency scale for accurate measurement of time and frequency.
Zhang, Xinliang, Zhao, Yanjing
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IEEE Photonics Journal, 2019 Ultra-dense broadband optical frequency combs with sub-MHz frequency spacing and stabilized carrier-envelope offset (CEO) are needed for many important applications, including high-accuracy real-time sub-Doppler spectroscopy, precise characterization of ...
Xiao-Zhou Li +4 more
doaj +1 more source
Precision frequency transfer with fiber frequency combs
Frontiers in Physics, 2022 We review methods for precision transfer of frequencies across broad optical wavelength ranges. Single-branch supercontinuum generation allows for a frequency transfer stability of < 1 × 10−17 in 1 s across an octave.
Martin E. Fermann +4 more
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Microresonator Based Optical Frequency Combs
Conference on Lasers and Electro-Optics 2012, 2012 Mid and near-IR optical frequency combs generation in ultra high Q crystalline and integrated SiN microcavities is presented. Moreover, universal dynamics that influences phase noise is described.
C. Y. Wang +6 more
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Matrix Stiffness Directs Stemness Signatures in Breast Cancer
Advanced Healthcare Materials, EarlyView.We built lab‐grown breast cancer models to study how the stiffness of the tumor's surroundings influences cancer behavior. Softer environments encouraged more stem‐like, drug‐resistant cells, while stiffer ones kept cells more differentiated. These findings show that tissue mechanics drive cancer diversity and drug resistance, offering new insights for
Chantal Kopecky +4 more
wiley +1 more source
On Frequency Combs in Monolithic Resonators
Nanophotonics, 2016 Optical frequency combs have become indispensable in astronomical measurements, biological fingerprinting, optical metrology, and radio frequency photonic signal generation.
Savchenkov A. A. +2 more
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Latest advances in optical frequency combs based on quadratic non‐linearity
IET Optoelectronics, 2020 Second‐order non‐linear susceptibility (χ2) is the cause of many non‐linear processes in optics including second harmonic generation, sum frequency generation and difference frequency generation. Optical frequency combs based on χ2, i.e.
Barturen Mariana +2 more
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