Effects of equalization in graded-index optical fibers influenced by mode mixing

1983 ◽  
Vol 66 (4) ◽  
pp. 93-100
Author(s):  
Tetsuya Yamamura ◽  
Kiyohiko Itoh ◽  
Hiroki Itoh
Keyword(s):  
Optical Fibers ◽  
Graded Index ◽  
Mode Mixing

scholarly journals Distributed Static and Dynamic Strain Measurements in Polymer Optical Fibers by Rayleigh Scattering

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5049
Author(s):  
Agnese Coscetta ◽  
Ester Catalano ◽  
Enis Cerri ◽  
Ricardo Oliveira ◽  
Lucia Bilro ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Time Domain ◽  
Rayleigh Scattering ◽  
Cost Effective ◽  
Time Domain Reflectometry ◽  
Dynamic Strain ◽  
Strain Measurements ◽  
Graded Index ◽  
Optical Time ◽  
Polymer Optical Fibers

We demonstrate the use of a graded-index perfluorinated optical fiber (GI-POF) for distributed static and dynamic strain measurements based on Rayleigh scattering. The system is based on an amplitude-based phase-sensitive Optical Time-Domain Reflectometry (ϕ-OTDR) configuration, operated at the unconventional wavelength of 850 nm. Static strain measurements have been carried out at a spatial resolution of 4 m and for a strain up to 3.5% by exploiting the increase of the backscatter Rayleigh coefficient consequent to the application of a tensile strain, while vibration/acoustic measurements have been demonstrated for a sampling frequency up to 833 Hz by exploiting the vibration-induced changes in the backscatter Rayleigh intensity time-domain traces arising from coherent interference within the pulse. The reported tests demonstrate that polymer optical fibers can be used for cost-effective multiparameter sensing.

Mode mixing and power diffusion in multimode optical fibers

1998 ◽  
Vol 16 (7) ◽  
pp. 1195-1202 ◽  
Author(s):  
J.N. Kutz ◽  
J.A. Cox ◽  
D. Smith
Keyword(s):  
Optical Fibers ◽  
Mode Mixing ◽  
Power Diffusion

Propagating Fields in Graded Index Optical Fibers

Fiber Optics ◽  
1979 ◽  
pp. 279-302
Author(s):  
M. D. Feit ◽  
J. A. Fleck
Keyword(s):  
Optical Fibers ◽  
Graded Index
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