Trace gas sensors are used in different fields. Light-induced thermoelastic spectroscopy (LITES) has extremely high sensitivity and offers non-contact measurement, attracting extensive research ...
Phase retrieval from single interferogram without carrier using Lissajous ellipse fitting technology
It is a general problem to demodulate 3-D phase information from the recording 2-D intensity distributions in optical metrology. Temporal phase-shifting (TPS) interferometry is the most accurate one 1 ...
Phase modulation 1 (PM) is applied in many fields, such as satellite communication systems 2, microwave Doppler radar systems 3, interferometry 4, laser Doppler vibrometers (LDV) 5, and phase ...
Current extrinsic fiber acoustic sensors face two primary challenges. The first lies in the time-varying initial phase of the interference signal, which arises from environmental vibrations, ...
a, Using the phase demodulation method, the peak-to-peak values of H-LITES signal were generally consistent, with an average of 55.54° and a standard deviation of 0.64°. The phase demodulation method ...
Lock-in amplifiers were invented in the 1930s [1, 2, 3] and commercialized [4] in the mid 20 th century as electrical instruments that are capable of extracting signal amplitudes and phases in ...
New JRC has announced the release of FM IF demodulator IC NJW2311. This new product has broadband function and phase shifter-less, and it is suitable for wireless or wired voice communication. The ...
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