Results 251 to 260 of about 41,136 (294)

Theory of the fundamental laser linewidth

Physical Review A, 1991
The theory of the laser linewidth is formulated to account for arbitrarily large output couplings and spatial hole burning. We show explicitly that the linewidth can be interpreted in terms of either spontaneous-emission noise or the amplification of vacuum field modes leaking into the cavity, depending on the ordering of operators in the correlation ...
, Goldberg, , Milonni, , Sundaram
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Laser Linewidth

Physics Today, 1985
One of the most important properties of laser light is its spectral purity and coherence. This unique quality has been important for the study of many new physical phenomena using laser sources that operate from the vacuum ultraviolet to the far infrared.
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Narrow-linewidth unstable resonator

Optics Letters, 1988
We describe the use of an asymmetric feedback ring in an unstable resonator to obtain arbitrarily narrow-linewidth radiation across the full available aperture. We demonstrate its use with an electric-discharge XeCl laser to produce single-line radiation with a linewidth of 0.15 cm−1.
D, Cooper, L L, Tankersley, J, Reintjes
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Theory of vibrational linewidths

Chemical Physics Letters, 1976
Abstract A simple theory of the homogeneous broadening of vibrational lines in the IR and Raman spectra of molecules in liquids is presented. The theory considers the relationship between the linewidth and excited state lifetime, parameters which may now be independently measured. It is used to qualitatively explain the dependence of the linewidth on
P.A. Madden, R.M. Lynden-Bell
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Vacuum fluctuations and the laser linewidth

2017 19th International Conference on Transparent Optical Networks (ICTON), 2017
The processes of absorption and stimulated emission are investigated via (i) energy conservation in a Fabry-Perot resonator, (ii) the Lorentz-oscillator model, and (iii) the Kramers-Kronig relations. Vacuum fluctuations are added and the relation between stimulated and spontaneous emission is clarified.
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Linewidth in microdisk laser

SPIE Proceedings, 1998
Among the attractive features of microcavity lasers for practical applications are the potential for reduced thresholds and the ability to design a mode structure with nearly ideal single mode operation. One of the most important parameters for semiconductor lasers is the linewidth. Generally the linewidth in semiconductor lasers is proportional to the
Yongqiang Ning, Sheng Li Wu, Lijun Wang, Jiuling Lin, Dehui Fu, Yun Liu, Dongjiang Wu, Yixin Jin   +7 more
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Photolithographic linewidth control

IEEE Transactions on Electron Devices, 1975
A simple model for the image formation process in photoresist is proposed based on Fresnel diffraction from the edge of a mask feature. It is shown theoretically and verified experimentally that the dimensional difference between a clear mask feature and its image in photoresist is given by aL½[ ln (E i ) - ln (E T ) + ln (K) ] where a and K are ...
D.A. McGillis, D.L. Fehrs
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Subnatural linewidth spectroscopy

Journal of Physics B: Atomic and Molecular Physics, 1980
The possibility of subnatural linewidth laser absorption spectroscopy is discussed and several examples using pulsed and CW excitation are proposed.
P L Knight, P E Coleman
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Measurement of Lorentzian linewidths

Nuclear Instruments and Methods, 1975
Abstract A new method is presented for the least-squares analysis of pulse height spectra from semiconductor detector-multichannel analyser systems, which does not involve the procedure of matching exponential tails onto Gaussian functions. We show that for a particular set of data taken at the Rutherford Laboratory the use of two Gaussian functions,
B.L. Roberts, R.A.J. Riddle, G.T.A. Squier   +2 more
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Natural linewidth of a micromaser

Optics Communications, 1993
Abstract The natural linewidth of a one-photon micromaser is studied through the two-line correlation function of the field. Both the exact and Fokker-Planck approaches are used and the results are compared. Near threshold, the exact linewidth can be nearly twice as large as the approximate linewidth given by the phase diffusion rate. Above threshold
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