منابع مشابه
Field modulated wavelength converters
We demonstrate 10Gbit/s operation of two different types of monolithic photocurrent driven wavelength converters (PD-WC). These photonic integrated circuits use a Semiconductor Optical Amplifier (SOA)-PIN photodetector receiver to drive an Electro-absorption (EA), or Mach-Zehnder (MZ) modulator that is integrated with a SGDBR tunable laser. We demonstrate improvements in optical bandwidth, inse...
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We report here on a quartz-enhanced photoacoustic (QEPAS) sensor employing a quantum cascade laser (QCL) structure capable of operating in a pure amplitude or wavelength modulation configuration. The QCL structure is composed of three electrically independent sections: Gain, Phase (PS) and Master Oscillator (MO). Selective current pumping of these three sections allows obtaining laser wavelengt...
متن کاملMulti-optical-wavelength ultrasound-modulated optical tomography: a phantom study.
We used multiple optical wavelengths to study ultrasound-modulated optical tomography (UOT) in tissue phantoms. By using intense acoustic bursts and a CCD camera-based speckle contrast detection technique, we observed variations of the ultrasound-modulated signal at various optical absorptions. The experimental variations were found to be highly correlated with predictions from Monte Carlo simu...
متن کاملA Light-Modulated Scattering Technique for Diffraction Field Measurements
. Tl:is paper des?ribes a scat tering method for meas uring microwave diff ractio n fi elds uSlllg light modulatIO n. A small photoelectric cell is suspended in t he fi eld as a scatterer upon whi ch light p ulses shine at an audi o rate. Only t he siO"nal scattered back by t he scat~ terer is modulated. A co herent detecto r is used which has ban outp ut voltage proportional to t he square of ...
متن کاملProcessing incommensurately modulated protein diffraction data with Eval15.
Recent challenges in biological X-ray crystallography include the processing of modulated diffraction data. A modulated crystal has lost its three-dimensional translational symmetry but retains long-range order that can be restored by refining a periodic modulation function. The presence of a crystal modulation is indicated by an X-ray diffraction pattern with periodic main reflections flanked ...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 2000
ISSN: 0108-7673
DOI: 10.1107/s0108767300024776