Results 151 to 160 of about 11,441 (205)

Spin switchable optical phenomena in Rashba band structures through intersystem crossing in momentum space in solution-processing 2D-superlattice perovskite film. [PDF]

Nat Commun
Dryzhakov B, Tang Y, Keum J, Ambaye H, Kim J, Lee TW, Lauter V, Hu B.   +7 more
europepmc   +1 more source

Random optical parametric oscillator fibre sensor. [PDF]

Light Sci Appl
Tovar P, von der Weid JP, Wang Y, Chen L, Bao X.   +4 more
europepmc   +1 more source

Unlocking the synergistic potential of sensor technologies in grassland research. [PDF]

Discov Sens
Jindo K, Oenema J, Miyoshi Y, Sijbrandij F, Maestrini B, Hoving I, Nishikawa H, Kempenaar C.   +7 more
europepmc   +1 more source

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Chirp optical time-domain reflectometry

Optical Fiber Communications Conference, 1995
Nowadays, optical time-domain reflectometers (OTDRs) are commonly used for measuring the attenuation characteristics of optical fibers. A large number of techniques that enlarge the dynamic range of OTDR and improve its spatial resolution have been reported.
Toshiya Sato, Tsuneo Horiguchi, Yahei Koyamada   +2 more
openaire   +1 more source

Chaos correlation optical time domain reflectometry

Science China Information Sciences, 2010
We propose a novel correlation optical time domain reflectometry (C-OTDR) of using broadband chaotic light. This reflectometry has the advantage over the conventional OTDR and the pseudorandom signal C-OTDR in range-independent spatial resolution. We employ a laser diode with feedback from a long fiber ring cavity as the source of chaotic probe light ...
AnBang Wang, YunCai Wang
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Time-Domain Expansion in Phase-sensitive Optical Time Domain Reflectometry

Optical Fiber Sensors Conference 2020 Special Edition, 2021
We demonstrate a spectral compression technique (equivalent to a temporal expansion) that allows a simple time-domain distributed interrogation of fibers with high resolution (~2 cm in this work) and using only low-bandwidth photodetection (400 KHz).
Miguel Soriano-Amat, Vicente Durán, Hugo F. Martins, Javier Preciado, Sonia Martin-Lopez, Miguel Gonzalez-Herraez, María R. Fernández-Ruiz   +6 more
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Advances in optical time domain reflectometry

Journal of Lightwave Technology, 1989
Advances in optical time-domain reflectometry (OTDR), such as enlargement of dynamic range, enhancement in resolution, reduction of noise intrinsic to single-mode fibers, and increase in user friendliness of the equipment, are reviewed. The gated detection technique and recent progress in OTDR are presented.
M. Tateda, T. Horiguchi
openaire   +1 more source

Wavelength Coded Optical Time-Domain Reflectometry

Journal of Lightwave Technology, 2010
This paper presents a wavelength coded optical time-domain reflectometry based on optical heterodyne technique. In this scheme, the probe and reference optical pulses have different wavelengths. This enables optical heterodyne detection to be used to improve the system performances significantly.
Ning Hua Zhu, Jian Hong Ke, Hong Guang Zhang, Wei Chen, Jian Guo Liu, Ling Juan Zhao, Wei Wang   +6 more
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Solitons for optical time-domain reflectometry

Journal of the Optical Society of America B, 1996
We describe the propagation of solitons in an optical time-domain reflectometry geometry. Intense nonsolitons usually broaden nonlinearly as they propagate out to a scatterer and broaden linearly as they return to their origin. In contrast, solitons propagate with a fixed pulse width or narrow on their way out to the scatterer.
Amikam Levanon, Stephen R. Friberg, Yoichi Fujii   +2 more
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Time-domain slicing optical frequency domain reflectometry

Optics Letters
A time-domain slicing (TDS) optical frequency domain reflectometry is proposed for large strain sensing with better spatial resolution. Compared with the conventional frequency domain slicing (FDS) method, the TDS with a Burg spectrum estimation is capable of enhancing the similarity of a local spectrum under large strain and mostly suppressing the ...
Qing, Bai, Zhen, Shen, Luxuan, Wu, Changshuo, Liang, Yu, Wang, Xin, Liu, Baoquan, Jin   +6 more
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