Results 211 to 220 of about 1,237,711 (248)
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Phase-modulation fluorometer using a phase-modulated excitation light source
Optical Review, 2012We propose a phase-modulation fluorometer (PMF) with a light-emitting diode (LED) or a laser diode (LD) used as an excitation light source (ELS) that is driven in the phase-modulation (PM) mode. The PM-ELS generates many frequency sidebands that spread in the vicinity of carrier frequency f c with the interval of modulation ...
Mizuno, Takahiko +2 more
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2015
Due to their extreme sensitivity, phase-modulated sensors are the most publicized of all the fiber optic sensors.1,2 Phase-modulated fiber optic sensors typically involve the use of optical interferometers to measure the change in phase of a single light signal or, more often, the relative phase change between two light waves.
Trevor W. MacDougall +2 more
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Due to their extreme sensitivity, phase-modulated sensors are the most publicized of all the fiber optic sensors.1,2 Phase-modulated fiber optic sensors typically involve the use of optical interferometers to measure the change in phase of a single light signal or, more often, the relative phase change between two light waves.
Trevor W. MacDougall +2 more
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Phase correction of light modulators
Optics Letters, 1986A new and inexpensive holographic technique for measuring the phase errors of a two-dimensional spatial light modulator (SLM) is described, and experimental verification is provided. A new technique to correct spatial phase errors in any SLM is then detailed and experimentally demonstrated.
David P. Casasent, Shao-Feng Xia
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Physica Scripta, 2002
We present a new simple and straightforward technique for solving the eigenvalue problem for initially phase modulated dark solitons in nonlinear dispersive media. Starting from the eigenvalue equations for the nonlinear Schrödinger equation which governs the dynamics of dark solitons, and introducing a set of new functions and a new variable for the ...
A. B. Shvartsburg +3 more
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We present a new simple and straightforward technique for solving the eigenvalue problem for initially phase modulated dark solitons in nonlinear dispersive media. Starting from the eigenvalue equations for the nonlinear Schrödinger equation which governs the dynamics of dark solitons, and introducing a set of new functions and a new variable for the ...
A. B. Shvartsburg +3 more
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Communication by Phase Modulation
Proceedings of the IRE, 1939Practical methods of generating and receiving phase modulation are described which open up the possibility of using phase modulation as a communication system. A new receiver is described which uses an off-neutralized crystal filter and provides a simple practical receiver which has not been heretofore available for phase modulation.
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External phase-modulation interferometry
Applied Optics, 1996We analyze and test a laboratory benchtop version of a compound interferometric phase sensor, a Michelson interferometer whose output is combined coherently with a phase-modulated local oscillator beam tapped off the Michelson input beam. This configuration models a whole class of external-modulation interferometers designed to shift signals, obscured ...
Charles C. Harb +4 more
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Modulation instability induced by cross-phase modulation
Physical Review Letters, 1987Modulation instability that leads to breakup of intense cw radiation into a train of ultrashort pulses during propagation in optical fibers occurs only in the presence of anomalous group-velocity dispersion. It is shown that a new kind of modulation instability can occur even in the normal-dispersion regime when two copropagating optical fields ...
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Phase transitions and modulated phases in lipid bilayers
Physical Review E, 1995We develop and analyze a continuum Landau theory for ordered chiral and achiral bilayer membranes. This theory contains couplings between tangent-plane orientational order and curvature that lead to ``rippled'' or ${\mathrm{P}}_{\mathrm{\ensuremath{\beta}}\ensuremath{'}}$ phases with one-dimensional height modulations and to phases with two-dimensional
Fred C. MacKintosh +2 more
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Phase and Modulation Fluorometry
1983This topic will be treated in four sections: basic theory, instrumentation, experimental procedures and new developments.
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Phase and Frequency Modulation
2009This chapter contains sections titled: Covariance Functions and Spectra Limiting Forms Generalizations This chapter contains sections titled: References ]]>
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