Results 121 to 130 of about 1,583 (160)

Distributed optical fiber biosensor based on optical frequency domain reflectometry

Biosensors and Bioelectronics, 2023
In situ acquisition of spatial distribution of biochemical substances is important in cell analysis, cancer detection and other fields. Optical fiber biosensors can achieve label-free, fast and accurate measurements. However, current optical fiber biosensors only acquire single-point of biochemical substance content.
Peidong Hua, Zhenyang Ding, Kun Liu, Haohan Guo, Ming Pan, Teng Zhang, Sheng Li, Junfeng Jiang, Tiegen Liu   +8 more
openaire   +2 more sources

Characterizing microring resonators using optical frequency domain reflectometry

Optics Letters, 2021
A novel, to the best of our knowledge, method to extract optical microring resonators’ loss characteristics is proposed and demonstrated using optical frequency domain reflectometry (OFDR). Compared with the traditional optical transmission measurement method, the spatial-resolved backscattering optical signals obtained from the OFDR can clearly show ...
Xiaopei Zhang, Yuexin Yin, Xiaojie Yin, Yongqiang Wen, Xiaolei Zhang, Xiaoping Liu, Haibin Lv   +6 more
openaire   +2 more sources

Aspects of optical frequency-domain reflectometry

Integrated Optics and Optical Fiber Communication, 1981
Optical time-domain reflectometry (OTDR) has proved to be a useful tool for fiber and fault diagnostics1 in the laboratory and in operating systems. This work is a preliminary analytical and experimental investigation of optical frequency-domain reflectometry (OFDR), applying swept frequency rather than pulse techniques.
F. P. Kapron, D. G. Kneller, P. M. Garel-Jones   +2 more
openaire   +1 more source

On the characterization of optical fiber network components with optical frequency domain reflectometry

Journal of Lightwave Technology, 1997
The basic features of coherent optical frequency domain reflectometry are presented. The ultimate limits of range and sensitivity were discussed, as well as polarization effects. It is shown that this technique is very suitable for optical network components characterization, and accurate measurements of a number of such components are presented.
Jean Pierre Von Der Weid, R Passy
exaly   +2 more sources

Optical-fiber diagnosis using optical-frequency-domain reflectometry

Optics Letters, 1985
Temporal signatures (reflection impulse responses) of optical fibers are obtained as the inverse Fourier transforms of the optical-frequency-domain reflectometry (OFDR) data. In this OFDR system, the entire process is automated. The modulation frequency is changed stepwise to obtain an exact inverse Fourier transform.
H, Ghafoori-Shiraz, T, Okoshi
openaire   +2 more sources

Optical frequency-domain reflectometry for microbend sensor demodulation

Applied Optics, 2000
The operation of an incoherent optical frequency-domain reflectometer for monitoring the continuous Rayleigh backscatter in a multimode optical fiber is presented. A simple but effective model to predict the value of beat frequencies arising in the system when excited by a linearly frequency-swept amplitude modulation has been developed.
S G, Pierce, A, MacLean, B, Culshaw
openaire   +2 more sources

Incoherent optical frequency domain reflectometry based on a Kerr phase-interrogator

Optics Express, 2014
We present a novel approach for incoherent optical frequency-domain reflectometry based on a frequency-swept sinusoidal optical signal and a Kerr phase-interrogator. The novel approach eliminates dependence on the laser coherence-length allowing for long-range operation. Long-range detection of reflection points as far as 151 km at a spatial-resolution
Colin C Baker, Xiaoyi Bao
exaly   +3 more sources

Optical frequency-domain reflectometry in single-mode fibers

Integrated Optics and Optical Fiber Communication, 1981
The backscattered light amplitude is measured from one end of a fiber as a function of optical frequency by tuning a HeNe laser over its linewidth. Fourier transform by a low-frequency electronic spectrum analyzer then reveals the spatial distribution of scattering and of the fiber losses.
W. Eickhoff, R. Ulrich
openaire   +1 more source

In-band optical frequency domain reflectometry in PONs

OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference, 2008
We present the novel concept of using data patterns as the driving signal for optical frequency domain reflectometry in PONs. Algorithms that generate the data patterns are developed, and the technique is confirmed through simulation.
Frank J. Effenberger, Sui Meng
openaire   +1 more source

Optical frequency domain reflectometry for aerospace applications

SPIE Proceedings, 2017
Optical Frequency Domain Reflectometry (OFDR) is the basis of an emerging high-definition distributed fiber optic sensing (HD-FOS) technique that provides an unprecedented combination of resolution and sensitivity. We examine aerospace applications that benefit from HD-FOS, such as for defect detection, FEA model verification, and structural health ...
Stephen T. Kreger, Osgar John Ohanian, Naman Garg, Matthew A. Castellucci, Dan Kominski, Nur Aida Abdul Rahim, Matthew A. Davis, Noah B. Beaty, James W. Jeans, Emily H. Templeton, J. R. Pedrazzani   +10 more
openaire   +1 more source