A method of active heterodyne detection over a continuous spectral range is also disclosed.
Heterodyne detection device for imaging an object by retro-injection
A system and method for performing Raman spectroscopy using a heterodyne detection scheme are described.
A detector part (30) carries out heterodyne detection to combine the phase modulated and other signals to output an RF signal having the phase modulation.
The detected light is subjected to a heterodyne detection on the basis of the output of the photoelectric converting means (30).
The heterodyning circuit output is configured to produce a signal which may be logarithmically related to the filtered signal.
The heterodyning circuit output is configured to produce a signal which may be logarithmically related to the filtered signal.
The invention relates to a method for telemetric measurement using a heterodyne-detection LIDAR device, said method using a LIDAR transmission signal consisting of two optical wave components (SSE1, SSE2) that are produced simultaneously.
Moreover, the high speed of response of these detectors makes it possible to achieve an ultrasensitive coherent detection, similar to that which has been developed for radio waves : heterodyne detection.
Moreover, the high speed of response of these detectors makes it possible to achieve an ultrasensitive coherent detection, similar to that which has been developed for radio waves : heterodyne detection.
Moreover, the high speed of response of these detectors makes it possible to achieve an ultrasensitive coherent detection, similar to that which has been developed for radio waves : heterodyne detection.
In electronics and optics, this procedure of combining signals to get the beat frequency is called heterodyne detection.
Provided are a photodetector device and a photodetection method, with which the heterodyne detection of a desired light to be detected can be performed, in high sensitivity and at a high SN ratio, and, a microscope and an endoscope.
A radio receiver for demultiplexing a multiplexed signal having a private band in a high frequency band of pseudo millimeter wave band or above and detecting heterodyne for each channel.
The researchers used ultrafast heterodyne-detected transient-grating spectroscopy to observe the isomerization of retinal in a sample of bovine rhodopsin that had been isolated from frozen bovine retinae.
A frequency divider (8) and a phase demodulator (9) extract the phase information (70) of the electrical signal (60) through heterodyne detection, the phase being proportional to the position of the retroreflector (7) and, hence, the target body (80).
The detected signal and the reference signal are then beat together, and heterodyne detection is used to detect only the light from the assigned source, which will beat with the reference signal and produce a signal at the offset frequency.
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