Simultaneous Measurement of the Core Diameter and the Numerical Aperture in Dual-Mode Step-Index Optical Fibers

2011 ◽  
Vol 29 (24) ◽  
pp. 3834-3837 ◽  
Author(s):  
Chams Baker ◽  
Raja Ahmad ◽  
Martin Rochette
Keyword(s):  
Optical Fibers ◽  
Simultaneous Measurement ◽  
Numerical Aperture ◽  
Dual Mode ◽  
Core Diameter ◽  
Step Index ◽  
The Core

A Step-Index Multimode Fiber-Optic Microbend Displacement Sensor Wavelength Dependent Loss

2019 ◽  
pp. 47-60
Author(s):  
Sami D. Alaruri
Keyword(s):  
Optical Fibers ◽  
Fiber Optic ◽  
Transmission Loss ◽  
Wavelength Dependence ◽  
Fiber Optic Sensors ◽  
Fused Silica ◽  
Displacement Sensor ◽  
Sensor Output ◽  
Core Diameter ◽  
Step Index

In this chapter, the wavelength dependence of bend loss in a step-index multimode optical fiber (100 µm core diameter; fused silica) was investigated for fiber bend radii ranging between 2.0 and 4.5 mm using six laser excitation wavelengths, namely, 337.1, 470, 590, 632.8, 750, and 810 nm. The results obtained from fitting the bend loss measurements to Kao's model and utilizing MATLAB® indicate that bend loss is wavelength dependent and transmission loss in multimode optical fibers increases with the decrease in the fiber bend radius. Furthermore, the response of a microbend fiber-optic displacement sensor was characterized at 337.1, 470, 632.8, 750, and 810 nm. Measurements obtained from the microbend sensor indicate that the sensor output power is linear with the applied displacement and the sensor output is wavelength dependent. Lastly, references for industrial and biomedical applications of microbend fiber-optic sensors are provided. Finally, a brief description for the transmission loss mechanisms in optical fibers is given.

Graded-Index and Single-Mode Polymer Optical Fibers

1992 ◽  
Vol 247 ◽  
Author(s):  
Yasuhiro Koike
Keyword(s):  
Mechanical Properties ◽  
Optical Fibers ◽  
Single Mode ◽  
Polymer Optical Fiber ◽  
Core Diameter ◽  
Graded Index ◽  
The Core ◽  
High Bandwidth ◽  
Polymer Optical Fibers ◽  
First Time

ABSTRACTHigh-bandwidth graded-index (GI) polymer optical fiber (POF) and single-mode POF with good mechanical properties were successfully obtained by our interfacial-gel polymerization technique. The bandwidth of the GI POF is about 1 GHz · km which is two hundred times larger than that of the conventional step-index (SI) POF. The minimum attenuation of transmission is 56 dB/km at 688-nm wavelength and 94 dB/km at 780-nm wavelength. The single-mode POF in which the core diameter was 3–15 μ m and the attenuation of transmission was 200 dB/km at 652-nm wavelength was successfully obtained for the first time.

High speed measurement of the core diameter of a step-index optical fiber

1980 ◽  
Vol 19 (22) ◽  
pp. 3756 ◽  
Author(s):  
L. S. Watkins ◽  
R. E. Frazee
Keyword(s):  
Optical Fiber ◽  
High Speed ◽  
Core Diameter ◽  
Step Index ◽  
The Core ◽  
Speed Measurement

Study of Wavelength-Dependent Bend Loss in Step-Index Multimode Fiber-Optic Microbend Displacement Sensor

2017 ◽  
Vol 6 (1) ◽  
pp. 13-21 ◽  
Author(s):  
Sami D. Alaruri
Keyword(s):  
Optical Fibers ◽  
Fiber Optic ◽  
Transmission Loss ◽  
Wavelength Dependence ◽  
Fused Silica ◽  
Displacement Sensor ◽  
Sensor Output ◽  
Bend Radius ◽  
Core Diameter ◽  
Step Index

In this article, the wavelength dependence of bend loss in a step-index multimode optical fiber (100 µm core diameter; fused silica) was investigated for fiber bend radii ranging between 2.0 and 4.5 mm using six excitation wavelengths, namely, 337.1, 470, 590, 632.8, 750 and 810 nm. The results obtained from fitting the bend loss measurements to Kao's model and utilizing MATLAB indicate that bend loss is wavelength dependent and transmission loss in multimode optical fibers increases with the decrease in the fiber bend radius. Furthermore, the response of a microbend fiber optic displacement sensor was characterized at 337.1, 470, 632.8, 750 and 810 nm. Measurements obtained from the microbend sensor indicate that the sensor output power is linear with the applied displacement and the sensor output is wavelength dependent.

Step-Index Optical Fibers With 0.88 Numerical Aperture

2019 ◽  
Vol 37 (15) ◽  
pp. 3734-3739 ◽  
Author(s):  
Brayan Patino-Jurado ◽  
Juan F. Botero-Cadavid ◽  
Jorge Garcia-Sucerquia
Keyword(s):  
Optical Fibers ◽  
Numerical Aperture ◽  
Step Index

Investigation of influence of tilt angle on mode dispersion in step-index plastic optical fibers

2011 ◽  
Vol 19 (1) ◽  
Author(s):  
M.S. Kovacevic ◽  
A. Djordjevich
Keyword(s):  
Optical Fibers ◽  
Tilt Angle ◽  
Functional Relationship ◽  
Numerical Aperture ◽  
Fiber Axis ◽  
Step Index ◽  
Mode Dispersion ◽  
Plastic Optical Fibers ◽  
Spectroscopic Sensors ◽  
First Time

AbstractEffect of numerical aperture on mode dispersion and bandwidth is reported for commercially available step-index plastic optical fibers. For the first time, the functional relationship is given between dispersion and the “tilt-angle” describing the slant of the input/output face for a fiber terminated by a plane not perpendicular to the fiber axis. This tilt of a non-squarely terminated fiber may be intentional as in some biomedical spectroscopic sensors, or otherwise when exploiting the quick-interconnectivity potential of plastic fibers.

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