Results 281 to 290 of about 80,084 (309)
Pound–Drever–Hall feedforward: laser phase noise suppression beyond feedback
OpticaPound-Drever-Hall (PDH) laser frequency stabilization is a powerful technique widely used for building narrow-linewidth lasers. This technique is however ineffective in suppressing high-frequency (>100~kHz) laser phase noise detrimental for many ...
Li You, Meng Khoon Tey
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Phase noise in semiconductor lasers: A theoretical approach
IEEE Journal of Quantum Electronics, 1983Noise 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, 1981Measurements 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 +4 more
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Effect of laser phase noise in Sagnac interferometers
Journal of Lightwave Technology, 1993A 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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Exact Moments of Filtered Laser Phase Noise
Journal of Lightwave Technology, 2007In 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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Breakdown of the Born approximation in laser phase-noise to amplitude-noise conversion
Physical Review A, 2005When 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 +2 more
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Theory of laser noise in the phase locking region
Zeitschrift f�r Physik, 1967We 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 +3 more
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Phase Noise Quenching in a Four-Level Laser
Chinese Physics Letters, 2010In the presence of usual transmission losses, it is shown that phase noise in a four-level laser can be reduced below the Schawlow–Townes limit when lasing levels are coupled to a squeezed vacuum reservoir. The squeezed vacuum coupled to the lasing mode modifies the phase diffusion rate and dominates the contribution from transmission losses.
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Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009
Using intracavity active phase modulation, we have verified the theory of Haus and Rana and realized timing jitter reduction from 304 fs to 150 fs integrated to Nyquist frequency on a 10.24 GHz actively mode-locked pulse train.
Ozharar, Sarper +3 more
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Using intracavity active phase modulation, we have verified the theory of Haus and Rana and realized timing jitter reduction from 304 fs to 150 fs integrated to Nyquist frequency on a 10.24 GHz actively mode-locked pulse train.
Ozharar, Sarper +3 more
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Effect of phase-conjugate feedback on the noise characteristics of semiconductor lasers
Physical Review A, 1992This paper considers the effect of phase-conjugate feedback (PCF) on the noise characteristics of semiconductor lasers. By using the single-mode, rate-equation formalism, it is shown that semiconductor lasers can achieve a steady state as long as the amount of PCF is below a critical value.
, Agrawal, , Gray
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