Non-Linear Interactions With Backscattered Light: A Truly Single-Ended Brillouin Optical Time-Domain Analysis Technique

2019 ◽  
Vol 37 (10) ◽  
pp. 2386-2402 ◽  
Author(s):  
Arthur H. Hartog ◽  
Florian V. Englich
Keyword(s):  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Analysis Technique ◽  
Non Linear ◽  
Optical Time ◽  
Linear Interactions

Single-fiber-based Brillouin Optical Time Domain Analysis with Far-end modulation

2021 ◽  
pp. 1-1
Author(s):  
Xia Gao ◽  
Xiaobin Hong ◽  
Sheng Wang ◽  
Xizi Sun ◽  
Liangming Xiong ◽  
...  
Keyword(s):  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Single Fiber ◽  
Optical Time

Concrete Modeling for Extreme Wave Slam Events

2017 ◽  
Author(s):  
Kasper Wåsjø ◽  
Terje P. Stavang ◽  
Tore H. Søreide
Keyword(s):  
Time Domain ◽  
Linear Time ◽  
Limit State ◽  
Material Model ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Capacity Control ◽  
Extreme Wave ◽  
Conventional Design ◽  
Non Linear

Experience from model tests has initiated a growing attention towards extreme wave slam as a critical load situation for offshore large volume structures. Most of the problem is related to the local slam pressure, which may go up to several MPa’s for 100-year and 10 000-year waves. The paper deals with modeling techniques for marine concrete structures under extreme slam loading from waves where dynamic effects together with material softening play a major role for the response. Different analysis approaches for ultimate limit state (ULS) and accidental limit state (ALS) controls are discussed in view of reliability philosophy as basis for conventional design approach. The present paper is devoted to the local impact scenario and the alternative approaches for response and capacity control involving non-linear time domain analyses. Conventional design schemes as based on linear elastic models for response calculation together with code specified capacity control often come out more conservative than non-linear approach. The paper demonstrates by case studies how softening of the structure in general reduces the response in terms of section forces. A key issue when going from conventional linear approaches into non-linear techniques is to still keep an acceptable reliability level on the capacity control. Load and material factors are normally based on structures with limited non-linearity where linear response modeling is representative. Implementing non-linear material model in time domain analysis has a major challenge in limiting the sensitivity in response and capacity calculation. The paper demonstrates the way material model of concrete affects the section forces to go into local capacity control, and concludes on needed sensitivity analyses. Practical approaches on the concrete slam problem together with resulting utilizations from the control are demonstrated. The full non-linear technique by response and capacity control in one analysis is also handled, using average material parameters and justifying safety factors for the effect of implementing characteristic lower strength of concrete in the capacity. The paper ends up in a recommendation on non-linear time domain analysis procedure for typically slam problems. A discussion is also given on applicable design codes with attention to non-linear analysis.

scholarly journals Brillouin optical time-domain analysis sensor assisted by Brillouin distributed amplification of pump pulses

2015 ◽  
Vol 23 (23) ◽  
pp. 30448 ◽  
Author(s):  
Javier Urricelqui ◽  
Mikel Sagues ◽  
Alayn Loayssa
Keyword(s):  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Optical Time

scholarly journals Non-linear time domain analysis of cross-flow vortex-induced vibrations

2017 ◽  
Vol 51 ◽  
pp. 134-151 ◽  
Author(s):  
M.J. Thorsen ◽  
S. Sævik ◽  
C.M. Larsen
Keyword(s):  
Time Domain ◽  
Linear Time ◽  
Cross Flow ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Vortex Induced Vibrations ◽  
Non Linear ◽  
Flow Vortex

Proposal and simulation of differential double-pulse pair Brillouin optical time-domain analysis

2013 ◽  
Author(s):  
Jianguan Tang ◽  
Wenping Luo ◽  
Beiqing Chen ◽  
Huiyong Guo ◽  
Cui Zhang
Keyword(s):  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Double Pulse ◽  
Pulse Pair ◽  
Optical Time

Spatial resolution improvement of single-shot digital optical frequency comb-based Brillouin optical time domain analysis utilizing multiple pump pulses

2018 ◽  
Vol 43 (15) ◽  
pp. 3534 ◽  
Author(s):  
Zihao Liang ◽  
Jingshun Pan ◽  
Shecheng Gao ◽  
Qi Sui ◽  
Yuanhua Feng ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Time Domain ◽  
Frequency Comb ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Single Shot ◽  
Resolution Improvement ◽  
Optical Time

Complex Brillouin Optical Time-Domain Analysis

2018 ◽  
Vol 36 (10) ◽  
pp. 1840-1850 ◽  
Author(s):  
Jian Fang ◽  
Miao Sun ◽  
Di Che ◽  
Matthew Myers ◽  
Hongchun Bao ◽  
...  
Keyword(s):  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Optical Time
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