Results 261 to 270 of about 6,304,985 (297)

Phase noise in a laser with output coupling

IEEE Journal of Quantum Electronics, 1984
An improved method of calculating the linewidth of a laser oscillator due to phase noise is proposed. The fluctuation in the output amplitude that leads to the phase diffusion is calculated as the amplified thermal and the quantum noise which are delta-correlated in time. The saturated gain distribution along the cavity axis that is consistent with the
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Measuring the phase noise of Raman lasers with an atom-based method

Review of Scientific Instruments, 2021
Phase noise of Raman lasers is a major source of noise for a Raman-type cold atom interferometer, which is traditionally measured using the signal source analyzer. We report here an atom-based method to measure the phase noise performance between two Raman lasers.
Yaning Wang, Shuhua Yan, Dongyang Xu, Mei Hu, Qixue Li, Xu Zhang, Huankai Zhang, Mengjie Lv, Aiai Jia, Guochao Wang, Lingxiao Zhu, Jun Yang   +11 more
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Effect of laser phase noise in Sagnac interferometers

Journal of Lightwave Technology, 1993
A theoretical analysis of the responsivity and the noise caused by backscattering in a Sagnac interferometer used as a sensor for reciprocal measurands, such as acoustic waves, is presented. Both Rayleigh backscattering and reflections from splices are taken into account. The noise power is found to increase proportionally to the source coherence time,
K. Krakenes, K. Blotekjaer
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Conversion of laser phase noise to amplitude noise in a resonant atomic vapor: The role of laser linewidth

Physical Review A, 1999
When laser light propagates through a resonant medium, the transmitted beam can exhibit excess intensity noise [amplitude modulation (AM)]. In a semiclassical description of the phenomenon, laser phase noise (PM) induces fluctuations in the medium's electric susceptibility, which in turn cause fluctuations in the transmitted intensity.
J. Camparo, J. Coffer
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Effect of laser and RF oscillator phase noises

2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535), 2004
The effect of phase noises from a laser and an oscillator on radio over fiber (RoF) systems is analyzed and discussed with a power spectral density (PSD) function. It is shown that the carrier to noise ratio (CNR) penalty is deeply related to the bandwidth of a electrical filter at a receiver and the phase noise from a radio frequency (RF) signal ...
null Tae-Sik Cho, null Changho Yun, null Kanghee Kim, null Kiseon Kim   +3 more
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Phase noise in semiconductor lasers: A theoretical approach

IEEE Journal of Quantum Electronics, 1983
Noise phenomena in semiconductor lasers have been extensively studied from an experimental point of view because of their importance in designing optical communication systems. Recently, a semiclassical theory of laser noise has been presented [1].
P. Spano, S. Piazzolla, M. Tamburrini
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Single-mode diode laser phase noise

Applied Physics Letters, 1981
Measurements have been made of the phase noise of a single-mode diode laser in an unbalanced Michelson interferometer, as a function of optical path difference. The noise increased linearly with increasing optical path difference. The origin of the phase noise is discussed.
A. Dandridge, A. B. Tveten, R. O. Miles, D. A. Jackson, T. G. Giallorenzi   +4 more
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Exact Moments of Filtered Laser Phase Noise

Journal of Lightwave Technology, 2007
In this paper, we derive an exact finite power series expression of the nth-order moment of a complex filtered phase noise random variable. This random variable is usually encountered in the error probability analysis of coherent heterodyne optical receivers.
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Theory of laser noise in the phase locking region

Zeitschrift f�r Physik, 1967
We start from quantum mechanical laser equations which were derived in a previous paper for an inhomogeneously broadened laser and which contain in particular the noise sources due to cavity losses, vacuum fluctuations, interaction with phonons and nonlasing photons and the pump. For the example of frequency locking caused by the nonlinear polarization
H. Haken, H. Sauermann, Ch. Schmid, H. D. Vollmer   +3 more
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Breakdown of the Born approximation in laser phase-noise to amplitude-noise conversion

Physical Review A, 2005
When a vapor absorbs laser light, the field's intrinsic phase fluctuations (PM) induce variations in the atoms' absorption cross section, which in turn yield fluctuations in the transmitted light intensity. In the Born approximation, the observed amplitude noise (AM) arises from a single scattering of the input field.
J. J. Townsend, J. G. Coffer, J. C. Camparo   +2 more
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