Results 21 to 30 of about 2,390,699 (275)
Universe, 2023 The Davis–Chandrasekhar–Fermi (DCF) method is widely used to indirectly estimate the strength of magnetic fields in star-forming regions. However, recent developments in this method have primarily focused on improving the measurement of angular ...
Shixian Mo, Keping Qiu
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Photonics, 2023 Narrow-linewidth lasers have a high spectral purity, long coherent length, and low phase noise, so they have important applications in atomic clocks, precision measurement, and quantum computing. We inject a transmitted laser from a narrow-linewidth (∼15
Lili Hao +4 more
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The Influence of Laser Linewidth on the Brillouin Shift Frequency Accuracy of BOTDR
Applied Sciences, 2018 This paper analyzes the influence of laser linewidth on the measurement accuracy of a frequency-scanning Brillouin optical time domain reflectometer (FS-BOTDR), allowing for both the width of Brillouin gain spectrum and the signal-to-noise ratio (SNR) of
Qing Bai +8 more
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Ultranarrow-linewidth levitated nano-oscillator for testing dissipative wave-function collapse
Physical Review Research, 2020 Levitated nano-oscillators are promising platforms for testing fundamental physics and quantum mechanics in a new high mass regime. Levitation allows extreme isolation from the environment, reducing the decoherence processes that are crucial for these ...
A. Pontin +3 more
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Group-delay measurement of frequency-converting devices using a comb generator [PDF]
, 2010 We propose a new method for the measurement of (group) delay from the radio-frequency (RF) input to the intermediate-frequency (IF) output of a mixer or a receiver.
Scott, Jonathan B., Hoy, M.
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L-Band Erbium Fiber Laser with Tunable and Narrow Sub-kHz Linewidth Output
Applied Sciences, 2023 In this paper, a wavelength-selectable erbium-doped fiber (EDF) laser in L-band bandwidth with a simple structure and low cost is described. To obtain stable single-longitudinal-mode (SLM) and narrow laser linewidth, the 2 m unpumped EDF-based saturable ...
Lan-Yin Chen +6 more
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Ultra narrow linewidth frequency reference via measurement and feedback
Comptes Rendus. Physique, 2023 The generation of very narrow linewidth light sources is of great importance in modern science. One such source is the superradiant laser, which relies on collectively interacting ultra long lived dipoles driven by incoherent light.
Barberena, Diego +3 more
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Atoms, 2022 In this work, we have applied polarization spectroscopy to study electromagnetically induced transparency involving hot Rb85 Rydberg state in a vapor cell using a Laguerre–Gaussian mode beam.
Naomy Duarte Gomes +3 more
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Linewidth measurement of free-running, pulsed, distributed feedback quantum cascade lasers
, 2022 S.4551-4554In gas spectroscopy with distributed feedback quantum cascade lasers (DFB-QCLs, linewidth is an important measurement parameter. However, in standard usage, these lasers are used in pulsed operation, so that the laser linewidth can no longer ...
Beyer, T. +3 more
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PT-symmetric feedback induced linewidth narrowing [PDF]
, 2023 Narrow linewidth is a long-pursuing goal in precision measurement and sensing. We propose a parity-time (PT )-symmetric feedback method to narrow the linewidths of resonance systems.
Tang, Yuanjiang +5 more
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