Results 71 to 80 of about 117,216 (290)

Chronic Hypoxia Disrupts Spermatogenesis Through ASXL2–EZH2–Mediated Microtubule Destabilization

Advanced Science, EarlyView.
This study reveals the mechanism by which chronic hypoxia impairs spermatogenesis via the ASXL2–EZH2 axis, hindering the transition of spermatids from round to elongated forms. Key findings reveal that under hypoxic conditions, downregulated ASXL2 expression reduces EZH2 binding to the CEP162 promoter, leading to decreased H3K27me3 modification and ...
Jun Yin, Mengjie Zhang, Wenying Liu, Wenlong Shen, Debao Li, Hongming Miao, Fang Deng, Gang Zhang, Yi Tian, Yi Zhang, Zhihu Zhao, Bing Ni   +11 more
wiley   +1 more source

Spectral Peaked Optical Frequency Comb for Highly Sensitive Spectroscopy

Advanced Photonics Research
Optical frequency combs represent a breakthrough in the field of metrology. Because an optical frequency comb has a large number of comb modes, the optical energy is dispersed over the comb modes, and the optical energy per comb mode is very small.
Norihiko Nishizawa, Shotaro Kitajima, Hideki Tomita, Hisashi Abe   +3 more
doaj   +1 more source

X-ray frequency combs from optically controlled resonance fluorescence

, 2013
An x-ray pulse-shaping scheme is put forward for imprinting an optical frequency comb onto the radiation emitted on a driven x-ray transition, thus producing an x-ray frequency comb.
Buth, Christian, Cavaletto, Stefano M., Harman, Zoltan, Keitel, Christoph H.   +3 more
core   +1 more source

Spectral Interferometry with Frequency Combs

Micromachines, 2022
In this review paper, we provide an overview of the state of the art in linear interferometric techniques using laser frequency comb sources. Diverse techniques including Fourier transform spectroscopy, linear spectral interferometry and swept-wavelength interferometry are covered in detail.
Krishna Twayana, Israel Rebolledo-Salgado, Ekaterina Deriushkina, Jochen Schröder, Magnus Karlsson, Victor Torres-Company   +5 more
openaire   +3 more sources

Spatial‐Wavelength Multiplexing Error‐Controlled Photonic Analog Computing System

Advanced Science, EarlyView.
A novel photonic integrated circuit prototype implementing the concept of general‐purpose analog computing and demonstrate its capability in radio frequency applications. The chip features a multichannel architecture and performs fully optical analog computation with frequency‐domain parallel processing. An FPGA‐based error‐correction algorithm aims to
Tao Zhu, Bowen Zhu, Shicheng Zhang, Keren Li, Xianchen Wu, Yazhi Pi, Jie Yan, Daigao Chen, Bingli Guo, Xi Xiao, Lei Wang, Xiaochuan Xu, Xuwei Xue, Shanguo Huang, Zizheng Cao, Shaohua Yu   +15 more
wiley   +1 more source

Phase-stabilized, 1.5-W frequency comb at 2.8 to 4.8 micron

, 2009
We present a high-power optical parametric oscillator-based frequency comb in the mid-infrared wavelength region using periodically poled lithium niobate.
Andres, Coddington, Diddams, Erny, Florian Adler, Foreman, Gebs, Ingmar Hartl, Jun Ye, Keilmann, Kevin C. Cossel, Lopez-Alvarez, Maddaloni, Marian, Martin E. Fermann, Michael J. Thorpe, Schibli, Schiller, Sun, Thorpe, Thorpe, Thorpe   +21 more
core   +1 more source

On-Chip Quantum Frequency Combs [PDF]

Optics and Photonics News, 2016
Nonclassical light sources of single and entangled photons are the backbone of future quantum communications infrastructure, and the cornerstone for realizing optical quantum computers. To reach practical applications, however, the enormous technical complexity of today’s sources must be drastically reduced through the development of integrated devices.
Reimer, C., Kues, M., Roztocki, P., Grazioso, F., Johnston, T., Morandotti, R., Wetzel, B., Little, B.E., Chu, S.T., Moss, D.J., Bromberg, Y., Caspani, L.   +11 more
openaire   +2 more sources

Embedded CRISPRi Enhances Gene‐Silencing Efficiency in Drosophila

Advanced Science, EarlyView.
Current CRISPR interference (CRISPRi) technology in Drosophila has limited efficiency. This study introduces the emCRISPRi platform, which significantly enhances transcriptional silencing efficacy by embedding inhibitory domains within the dCas9 architecture.
Pengchong Fu, Xuedi Zhang, Ying Zhou, Jie Zheng, Angyang Sun, Kailong Zhuang, Weiwei Bao, Guanjun Gao   +7 more
wiley   +1 more source

Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser

Advanced Science, EarlyView.
An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu, Aswathy Sundaresan, Nazire‐Begüm Kazkal, Clement Lafargue, Lior Zarfaty, Li‐Gang Wang, Ofek Birnholtz, Dominique Decanini, Melanie Lebental, Patrick Sebbah   +9 more
wiley   +1 more source

Self-referencing a continuous-wave laser with electro-optic modulation [PDF]

, 2015
We phase-coherently measure the frequency of continuous-wave (CW) laser light by use of optical-phase modulation and f-2f nonlinear interferometry. Periodic electro-optic modulation (EOM) transforms the CW laser into a continuous train of picosecond ...
Beha, Katja, Coillet, Aurélien, Cole, Daniel C., Del'Haye, Pascal, Diddams, Scott A., Papp, Scott B.   +5 more
core   +2 more sources