Results 171 to 180 of about 25,049 (217)
Some of the next articles are maybe not open access.
1994
Abstract In a heterodyne detection system (Martin and Wickramasinghe 1987), shown schematically in Fig. 7.1, the first beam splitter divides into two components. One passes through an acousto-optic modulator that shifts the beam frequency by Om , and the other is reflected onto a mirror as a reference beam.
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Abstract In a heterodyne detection system (Martin and Wickramasinghe 1987), shown schematically in Fig. 7.1, the first beam splitter divides into two components. One passes through an acousto-optic modulator that shifts the beam frequency by Om , and the other is reflected onto a mirror as a reference beam.
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Heterodyne detection of synchrotron radiation
Hyperfine Interactions, 2000A time integral method for the study of resonant nuclear scattering of synchrotron radiation in the forward direction is presented. The method relies on the interference of radiation scattered by nuclei in two samples, one moving with respect to the other.
R. Coussement +3 more
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Raman Heterodyne Detection of NMR
1983A novel coherent Raman effect induced by an optical and a radio frequency (rf) field is used to detect nuclear magnetic resonance (NMR) in solids[1]. The technique, which employs heterodyne detection, is capable of monitoring coherent spin transients or nuclear resonances under cw conditions, both in ground and excited electronic states and with high ...
J. Mlynek +4 more
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Analyses of optoelectronic heterodyne detection
Annual Meeting Optical Society of America, 1989The use of APD for optoelectronic heterodyne detection (OEHD) for a rf modulated lightwave has been reported.1 In OEHD, the APD is used both as an optical detector and frequency downconverter (mixer). Since the gain of the APD is a nonlinear function of the bias voltage, the inclusion of a rf local oscillator with dc bias will convert the incoming rf ...
Charles S. Ih, X. C. Du
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Raman heterodyne detection of nuclear magnetic resonance
Physical Review B, 1983A novel coherent Raman effect induced by a laser and a radio-frequency (rf) field is used to detect cw and pulsed nuclear magnetic resonance (NMR) in ground and excited electronic states. The effect is illustrated in the impurity-ion solid ${\mathrm{Pr}}^{3+}$: La${\mathrm{F}}_{3}$ at 1.6 K utilizing the ${\mathrm{Pr}}^{3+}$ optical transition $^{3}H_ ...
J. Mlynek +4 more
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Optical heterodyne detection of laser-induced gratings
Optics Letters, 1998A novel optical arrangement for heterodyne detection of laser-induced gratings based on the use of a phase mask for both excitation and probe beams provides phase stability and control without the need for an active stabilization scheme. The arrangement greatly simplifies the laser-induced grating experiment.
A A, Maznev, K A, Nelson, J A, Rogers
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Heterodyne-Detected Vibrational Sum Frequency Generation Spectroscopy
Journal of the American Chemical Society, 2008We present a new technique of broad-band heterodyne-detected sum frequency generation (HD-SFG) spectroscopy and demonstrate its high sensitivity allowing surface-selective measurements of vibrational spectra at submonolayer surface coverage, as low as a few percent of a monolayer.
Igor V, Stiopkin +3 more
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Coherent or Heterodyne Detection
1978In the previous chapter we discussed the detection of the incident power in an optical or infrared wave, basically ignoring the actual frequency of the wave except in the value of the quantum energy and the wavelength or frequency cutoff of the photon detector.
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Multifrequency CO2 Laser Heterodyne Detection
Coherent Laser Radar: Technology and Applications, 1991The nonlinear four-frequency heterodyne detection has been analysed theoretically in experiment. The nonlinear four-frequency heterodyne detection was realized and the results obtained coincides with expected one in this paper, we suggest multifrequency heterodyne detection systems, which can be used for finding out objectives, imaging contours and ...
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Laser heterodyne detection techniques
1976It is evident that heterodyne detection techniques can be employed in a variety of ways for atmospheric monitoring applications. Although progress has seemed painfully slow at times, results of laboratory experiments are encouraging. The time has come to move a few specialized instruments employing heterodyne detection out of the laboratory, and to ...
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