Results 11 to 20 of about 2,995,639 (168)

382 mW External-Cavity Frequency Doubling 461 nm Laser Based on Quasi-Phase Matching

Photonics, 2023
To rapidly improve strontium optical clocks, a high-power, high-efficiency, and high-beam-quality 461 nm laser is required. In blue lasers based on periodically poled KTiOPO4 crystals, the optical absorption in the crystals can induce thermal effects ...
Yingxin Chen, Guodong Zhao, Wei Tan, Hong Chang   +3 more
doaj   +1 more source

Development of an Interference Filter-Stabilized External-Cavity Diode Laser for Space Applications

Photonics, 2020
The National Time Service Center of China is developing a compact, highly stable, 698 nm external-cavity diode laser (ECDL) for dedicated use in a space strontium optical clock. This article presents the optical design, structural design, and preliminary
Linbo Zhang, Tao Liu, Long Chen, Guanjun Xu, Chenhui Jiang, Jun Liu, Shougang Zhang   +6 more
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Single-cycle all-fiber frequency comb

APL Photonics, 2021
Single-cycle pulses with a deterministic carrier-envelope phase enable the study and control of light–matter interactions at the sub-cycle timescale, as well as the efficient generation of low-noise multi-octave frequency combs.
Sida Xing, Daniel M. B. Lesko, Takeshi Umeki, Alexander J. Lind, Nazanin Hoghooghi, Tsung-Han Wu, Scott A. Diddams   +6 more
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Broadband 1-GHz mid-infrared frequency comb

Light: Science & Applications, 2022
Mid-infrared (MIR) spectrometers are invaluable tools for molecular fingerprinting and hyper-spectral imaging. Among the available spectroscopic approaches, GHz MIR dual-comb absorption spectrometers have the potential to simultaneously combine the high ...
Nazanin Hoghooghi, Sida Xing, Peter Chang, Daniel Lesko, Alexander Lind, Greg Rieker, Scott Diddams   +6 more
doaj   +1 more source

Construction of optical system for an atomic clock-beyond atomic fountain

Frontiers in Physics, 2022
We demonstrate the construction of the optical system in the atomic clock-beyond atomic fountain based on 87Rb atom. The optical system includes a high-stability laser system and an optical lattice.
Xiumei Wang, Xiumei Wang, Jin He, Yifei Wang, Yunjia Wang, Wenming Wang, Weili Wang, Shiguang Li, Xi Zhu, Guodong Liu, Shuo Liu, Ye Wang, Liang Wang, Yaxuan Liu, Tongmin Yang, Chunyan Cao, Yiqun Wei, Yutao Yue, Guoqing Hu, Zhenfeng Liu, Yimin Pan, Lianshan Gao   +21 more
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Sparsity in Time-Frequency Representations [PDF]

Journal of Fourier Analysis and Applications, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Pfander, Götz E., Rauhut, Holger
openaire   +3 more sources

A Quantum-Based Microwave Magnetic Field Sensor

Sensors, 2018
In this paper, a quantum-based method for measuring the microwave magnetic field in free space is presented by exploring atomic Rabi resonance in the clock transition of 133Cs.
Hao Shi, Jie Ma, Xiaofeng Li, Jie Liu, Chao Li, Shougang Zhang   +5 more
doaj   +1 more source

Measuring Height Difference Using Two-Way Satellite Time and Frequency Transfer

Remote Sensing, 2022
According to general relativity theory (GRT), the clock at a position with lower geopotential ticks slower than an identical one at a position with higher geopotential.
Peng Cheng, Wenbin Shen, Xiao Sun, Chenghui Cai, Kuangchao Wu, Ziyu Shen   +5 more
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Time‐frequency synchroextracting transform [PDF]

IET Signal Processing, 2021
Abstract The study proposes a novel time‐frequency analysis technique, titled time‐frequency synchroextracting transform which enhances the accuracy of synchroextracting transform. The synchroextracting transform is a powerful postprocessing method that sharpens the energy distribution of spectrogram.
Ran Zhang, Xingxing Liu, Yongjun Zheng, Haotun Lv, Baosheng Li, Shenghui Yang, Yu Tan   +6 more
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Review of the development of the hydrogen maser technique and a brief introduction to its space applications

Frontiers in Physics, 2022
Since 1960, when the first hydrogen frequency standard, the microwave amplification by stimulated emission of radiation (maser), was developed in the laboratory of Norman Ramsey at Harvard University, the performance of its frequency stability and ...
Jiayu Dai, Tiexin Liu, Yong Cai, Zhichun Chen, Qi Li, Qi Li   +5 more
doaj   +1 more source