Results 11 to 20 of about 3,059,110 (191)
Non-commutative time-frequency tomography [PDF]
Physics Letters A, 1999 The characterization of non-stationary signals requires joint time and frequency information. However, time (t) and frequency (omega) being non-commuting variables there cannot be a joint probability density in the (t,omega) plane and the time-frequency distributions, that have been proposed, have difficult interpretation problems arising from negative
Man'ko, V. I., Vilela Mendes, R.
openaire +2 more sources
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 +6 more
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Applied Sciences, 2022 Accurately manipulating quantum states is a fundamental strategy for improving the performance of quantum metrology, computing, and simulation. However, the quantum state is susceptible to dephasing due to the temperature and density of the atomic ...
Feng Guo +3 more
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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 +3 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 +6 more
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Time-frequency detection of Gravitational Waves [PDF]
, 1999 We present a time-frequency method to detect gravitational wave signals in interferometric data. This robust method can detect signals from poorly modeled and unmodeled sources.
A. Abramovici +22 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 +6 more
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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 +21 more
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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 +5 more
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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 +5 more
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