This article was written by Joni Nurmi ,Zhen Shi and Sun Hai
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!history-of-fiber-optic.jpg|width=300!
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Image Removed source of figure: http://fiberoptic101.blogspot.fi/2010/11/history-of-fiber-optic.html] |
Principle of operation
Fiber optical cables are highly transparent, cylindrical conduits for light. These cables are formed of two materials with different refractive indices. This creates a optimal waveguide for transmitting light. When light enters the fiber made of material with higher refractive index than the cladding surrounding it, it stays inside the material due to total internal reflection and is thus transmitted forward.
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Constructions are different
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source of figure: http://www.rp-photonics.com/multimode_fibers.html] |
Transmissions are different
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!Fiber single mode.GIF!
!fiber multimode fiber.GIF!
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What is polarization-maintaining fibers?
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Cross Section of Polarization Maintaining Fibers:
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\[4\] Source of the figure: [http://www.fiberoptics4sale.com/wordpress/what-are-polarization-maintaining-fibers/|http://www.fiberoptics4sale.com/wordpress/what-are-polarization-maintaining-fibers/] |
The above three pictures illustrated the three different types of polarization maintaining fibers, which are Panda, Elliptical-clad, Bow-tie. There fibers contain a unique feature; they have stress rods in fibers (a feature not seen in other fiber types). The stress rods are two circles in the Panda PM fiber, a elliptical clad in elliptical-clad PM fiber and two bow-ties in the Bow-Tie type PM fiber. The most important property of stress rods is that it creates stress in the core of the fiber such that the transmission of only one polarization plane of light is favored.
YouTube video - a brief introduction of the polarization-maintaining fibers
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| url | http://www.youtube.com/watch?v=7rrb-_Iin-g |
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\[5\] Source of the video: [http://www.youtube.com/watch?v=7rrb-_Iin-g|http://www.youtube.com/watch?v=7rrb-_Iin-g] |
References:
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\[4\] What Are Polarization Maintaining |
Fibers? - Fibers? - [http://www.fiberoptics4sale.com/wordpress/what-are-polarization-maintaining-fibers/] |
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\[5\] What is Polarization Maintaining |
Fiber? - Fiber? \- [http://www.youtube.com/watch?v=7rrb-_Iin-g] |
Principle of operation - Special purpose fiber - http://en.wikipedia.org/wiki/Optical_fiber
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