High-Speed Mach-Zehnder-OTDR Distributed Optical Fiber Vibration Sensor Using Medium-Coherence Laser
Sign Up to like & getrecommendations! Published in 2018 at "Photonic Sensors"
DOI: 10.1007/s13320-018-0499-4
Abstract: This article presents a high-speed distributed vibration sensing based on Mach-Zehnder-OTDR (optical time-domain reflectometry). Ultra-weak fiber Bragg gratings (UWFBG), whose backward light intensity is 2-4 orders of magnitude higher than that of Rayleigh scattering, are… read more here.
Keywords: medium coherence; zehnder otdr; coherence laser; vibration ... See more keywords
Role of spontaneously transferred coherence in laser cooling
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DOI: 10.1103/physreva.110.033101
Abstract: The well-known sub-Doppler polarization gradient cooling in type-I transition ($F_e=F_g+1$) is caused by red-detuned lasers. On the other hand, in type-II transition ($F_e\le F_g$), sub-Doppler cooling takes place through blue-detuned lasers. This opposite behavior for… read more here.
Keywords: transferred coherence; spontaneously transferred; coherence laser; blue detuned ... See more keywords
Low coherence laser pulse amplification theory for rare earth ions doped glass medium.
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DOI: 10.1364/oe.473229
Abstract: A new theory for the low coherence laser amplification in rare ions doped glass has been proposed. Based on one-dimensional continuous energy level assumption and independent response assumption, the theory can describe the amplification of… read more here.
Keywords: theory; laser; coherence laser; coherence ... See more keywords