Hollow Waveguides
光電100 F84966119 侯昕華
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Outline
S Introduction
S Basis of Hollow Waveguides
S Structures of Hollow
Waveguides
S Metal-Tube Waveguides
S Plastic-Tube waveguides
S Hollow Glass Waveguides
S Hollow Waveguides with
ODR
S Applications
S References
Introduction
Hollow Waveguides
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S The principle of total internal reflection,
S On this basis the light can be delivered by a
fiber or by a hollow waveguide.
S For the visible and low power level optical
the fibers are a good solution for the
delivery system.
Introduction
which operates in water stream, can be
used for bringing the light to proper
destination by a glass tube.
S The transmission of light through an
S The maximum energy transmitted through
the fiber is determined by the air
breakdown and by the damage threshold of
the fiber front surface and the bulk.
S And such waveguide structures suffer the
fundamental limitations associated with
light propagation through solids, such as
dispersion, absorption, scattering and
nonlinear effects.
Introduction
ordinary glass fiber is limited by the
spectral transmission of glass. It is not
transparent in the UV region and in the
infrared region.
S A possible solution can be the fiber having
its core formed by the air, i.e., hollow
waveguides.
core, the light can be constrained to form a
waveguide.
Introduction
S By using highly reflective walls in a hollow
Basis of
Hollow Waveguides
Hollow Waveguides
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refraction coefficient value the hollow
waveguides can be grouped into two
categories:
1.
2.
“Leaky” waveguides whose wall materials
have refractive indices greater than one
(nwall>1).
“Attenuated total reflectance ” (ATR)
waveguides whose wall is composed of
dielectric materials with refractive indices
less than one in the wavelength region of
interest (nwall<1).
Basis of Hollow Waveguides
S According to the effective index of
which can be made of plastic, metal,
special or ordinary glass or crystal.
Basis of Hollow Waveguides
S The basis of hollow waveguides is a tube,
Structures of
Hollow Waveguides
Hollow Waveguides
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Structures of Hollow Waveguides
S Metal-Tube Waveguides
Structures of Hollow Waveguides
S Plastic-Tube Waveguides
Structures of Hollow Waveguides
S Hollow Glass Waveguides
Reflector
Structures of Hollow Waveguides
S Hollow Waveguides with Omni-Directional
Applications
Hollow Waveguides
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S Applications of hollow waveguides fall into
S The use of hollow glass or metallic
waveguides to deliver laser power has
largely been relegated to laser surgery
where the required power is less than 100
W.
Applications
two broad categories: laser power delivery
and fiber sensors.
S As sensors, hollow waveguides are
S The hollow waveguides may be used
merely as a passive fiber link from the
chemical processing area to a remote
detector, or they may play a more active
role in which the guide is filled with the gas
to be sensed.
Applications
generally used either to transmit blackbody
radiation for temperature measurements or
as an active or passive link for chemical
sensing.
References
Hollow Waveguides
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References
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Helena, J., Michal, N., Jan, S., Pavel, C., Mitsunobu, M., Yi-Wei,
S., et al. (2004). Hollow waveguide delivery systems for laser
technological application. Progress in Quantum Electronics , 28, 145164.
Hollow Waveguides - IR Fiber Review. (n.d.). From Specialty Fiber
Optics: irfibers.rutgers.edu/ir_rev_hgw.html
James, H. A. (2000). A Review of IR Transmitting, Hollow
Waveguides. Fiber and Integrated Optics , 211-227.
Mihai, I., Steven, J. G., Marin, S., J. D., J., Yoel, F., Ori, W., et al.
(2003). Analysis of mode structure in hollow dielectric waveguide
fibers. PHYSICAL REVIEW E , 67, 046608-1-046608-8.
Shih-Shou, L., Chii-Chang, C., Shih-Chieh, H., & Cheng-Yi, L.
(2006). Fabricating a Hollow Optical Waveguide for Optical
Communication Applications. JOURNAL OF
MICROELECTROMECHANICAL SYSTEMS , 15 (3), 584-587.
Shih-Shou, L., Mou-Sian, W., & Chii-Chang, C. (2004).
Semiconductor hollow optical waveguides formed by omnidirectional reflectors. OPTICS EXPRESS , 12, 6589-6593.
Total internal reflection - Wikipedia, the free encyclopedia. (2010).
Retrieved from Wikipedia, the free encyclopedia:
http://en.wikipedia.org/wiki/Internal_reflection
Waveguide (electromagnetism) - Wikipedia, the free encyclopedia. (2010).
Retrieved from Wikipedia, the free encyclopedia:
http://en.wikipedia.org/wiki/Waveguide_(electromagnetism)
Hollow Waveguides
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