Results 271 to 280 of about 504,913 (304)
Some of the next articles are maybe not open access.
Intensity dependent phase shifts in frequency modulation spectroscopy
AIP Conference Proceedings, 1993We discuss experimental observations of an induced phase shift of the rf signal produced in FM saturated absorption measurements under the conditions of large probe beam intensities. This phase shift can be understood in terms of the phase difference between the phase modulation of the optical driving field and the steady state macroscopic polarization
H.-R. Xia +6 more
openaire +1 more source
Phase shifted addressing using a spatial light modulator
Microelectronic Engineering, 2005Spatial light modulator (SLM)-based microlithography has been developed into a mask writer system with state of the art performance. The system is conceptually a stepper with a programmable mask where the discrete mirror structure on the SLM is filtered out by an aperture in the Fourier plane. The SLM-chip consist of 1million flat tilting micro-mirrors
Ulric Ljungblad +2 more
openaire +1 more source
A Variable Phase-Shift Frequency-Modulated Oscillator
Proceedings of the IRE, 1949The theory of operation of a phase-shift type of oscillator is discussed briefly. This oscillator consists of a broad-band amplifier, the output of which is fed back to the input through an electronic phase-shifting circuit. The instantaneous frequency is controlled by the phase shift through this latter circuit.
openaire +1 more source
Phase-shift-locked interferometer with a wavelength-modulated laser diode
Applied Optics, 2003A phase-shift-locked interferometer has been constructed for distance measurement. A phase shift produced by sawtooth-current modulation of a laser diode is locked to a phase difference preset by polarization optics that consists of a quarter-wave plate and polarizers through an electrical feedback technique.
Ribun, Onodera, Yukihiro, Ishii
openaire +2 more sources
Non-Photic Modulation of Phase Shifts to Long Light Pulses
Journal of Biological Rhythms, 2007Circadian rhythms can be reset by both photic and non-photic stimuli. Recent studies have used long light exposure to produce photic phase shifts or to enhance non-photic phase shifts. The presence or absence of light can also influence the expression of locomotor rhythms through masking; light during the night attenuates locomotor activity, while ...
Michael C, Antle +3 more
openaire +2 more sources
Phase shifts in periodically modulated bistable potentials
Physical Review Letters, 1993L. GAMMAITONI, MARCHESONI, Fabio
openaire +3 more sources
Phase Shift Modulations for Stable, Oscillatory, Traveling, Strongly Nonlinear Waves
Studies in Applied Mathematics, 1991Oscillatory dispersive waves propagating in a slowly varying medium are analyzed for Klein‐Gordon equations with perturbations. The method of multiple scales is extended to include two fast scales, the usual traveling‐wave phase and time, in order to allow initial conditions not usually permitted.
openaire +2 more sources