scholarly journals High‐speed quasi‐distributed strain sensing based on time division multiplexing of fibre Bragg gratings

2016 ◽  
Vol 52 (8) ◽  
pp. 643-645 ◽  
Author(s):  
L. Ma ◽  
C. Ma ◽  
Y. Wang ◽  
D.Y. Wang ◽  
A. Wang
Keyword(s):  
High Speed ◽  
Bragg Gratings ◽  
Strain Sensing ◽  
Time Division Multiplexing ◽  
Fibre Bragg Gratings ◽  
Time Division ◽  
Distributed Strain

Optics-Based Strain Sensing System

2011 ◽  
Vol 700 ◽  
pp. 178-181 ◽  
Author(s):  
Kevin J. Stevens ◽  
Grant V.M. Williams ◽  
I. Monfils ◽  
D. Hirst ◽  
P. Wagner ◽  
...  
Keyword(s):  
Testing Machine ◽  
Bragg Gratings ◽  
Strain Sensors ◽  
Strain Sensing ◽  
Temperature Drift ◽  
Multiple Sensors ◽  
Sensing System ◽  
Fibre Bragg Gratings ◽  
Distributed Strain ◽  
Dynamic Strains

An optics-based strain sensing system is being developed for quazi-distributed strain sensing in locations and environments that are not accessible to conventional strain sensors. The system comprises an Optical Interrogator that has been designed and constructed by Southern Photonics [1], and optical fibre coupled Bragg grating strain sensors. It has been tested using commercial fibre Bragg gratings [2] that were attached to 2 samples of 316 grade stainless steel and cycled in strain and temperature using an Instron mechanical testing machine and temperature controlled cabinet. The results have been compared to the performance of conventional electrical resistance strain gauges. Pairs of fibre Bragg gratings were simultaneously interrogated at 1540 and 1550 nm centre wavelengths to demonstrate the ability of the system to use multiple sensors for quazi-distributed sensing and temperature compensation. The Optical Interrogator resolution is approximately 4 microstrains, accounting for longer term temperature drift, and it is capable of resolving dynamic strains at rates of up to 90 Hz.

High-speed single-pixel imaging by frequency-time-division multiplexing

2020 ◽  
Vol 45 (8) ◽  
pp. 2339 ◽  
Author(s):  
Hiroshi Kanno ◽  
Hideharu Mikami ◽  
Keisuke Goda
Keyword(s):  
High Speed ◽  
Time Division Multiplexing ◽  
Time Division ◽  
Single Pixel

scholarly journals The Influence of Digital Modulations on 320 Gbit/s Optical Time Division Multiplexing

2015 ◽  
Vol 11 (4) ◽  
pp. 187
Author(s):  
Lukas Koci ◽  
Petr Munster ◽  
Tomas Horvath ◽  
Milan Cucka ◽  
Miloslav Filka
Keyword(s):  
Optical Fiber ◽  
Bit Error Rate ◽  
Error Rate ◽  
High Speed ◽  
Positive Influence ◽  
Modulation Formats ◽  
Time Division Multiplexing ◽  
Optical Time Division Multiplexing ◽  
Optical Time ◽  
Time Division

In this article the optical time division multiplexingtechnique for high speed point-to-point optical networksis discussed. We performed test of influence of selected types modulation formats in the optical time division multiplexing simulation model with a distance of 30 km. Additionally, this paper focuses on maximum bandwidth usage, improvement of bit error rate and the another goal is to achieve the maximal transmission distance by using of special compensation optical fiber. Optimal length of compensation optical fiber was found and used during simulations. We demonstrated positive influence compensation optical fiber on bit error rate. For comparisonof modulation formats such as return-to-zero, non-return-to-zero, chirped-return-to-zero, carrier-suppressed-return-to-zero, and m-ary quadrature amplitude modulation were tested. Our results confirm that it is possible to achieve better bit error rate for selected modulation formats.

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