1.
You have 25 km of optical cable with an attenuation coefficient of
0.27 dB/km. What is the total attenuation due to the cable?
3. Considering further question 1. If the power transmitted is
1 mW and the receiver sensitivity is -30 dBm what is the maximum
distance of optical fiber that can be used before amplification is
needed? You can assume only cable losses.
Design a Butterworth bandpass filter with the given
requirements:
10 dB stopband attenuation at 100 rad/sec and 900 rad/sec
1dB passband attenuation at 400 rad/sec and 600 rad/sec
As shown in below figure, the attenuation of an optical fiber
line with the length of 12 km is 2.5 dB/km. The radius of the fiber
core is 5 μm. If the optical power at the input of the fiber is 300
μW, what is the output INTENSITY at the output of the fiber?
Please answer in detail the discussions questions below.
1. Why do optical fibers have a minimum bend radius? What might
happen if this minimum bend radius is exceeded?
2. Find or create your own application for the color dependence
of the index of refraction. Your example need not be fully
developed, but it should (1) address some task, and (2) be clear
about the application of the color dependence to the task.
1. Optical fibers can be classified according to the
number of modes and their refractive index profiles. Explain what
you know about optical fibers with this classification! Why is
singlemode optical fiber widely used as a backbone optical fiber
communication system?
1. What is total internal reflection and why is it important in
optical fibers? What is the critical angle?
2. Does a diverging lens have a focus point?
3. What type of lens, diverging or converging, would you use for
a magnifying glass? Explain.
42 The increasing use of optical fibers for the construction of
networks broadband telecommunications has led to considerable
advances technology of glassmaking (...). The glasses have
structure network based on a non-metal oxide, typically silica
(SiO2), fused with metal oxides which act as "Network modifiers"
and change the arrangement of links solid (...). The glass resists
the attack of most reagents. However, the silica glass is reacted
with acid hydrofluoric to form fluoro-silicate ions: (Explain your
answer)
SiO2 (s) +...
In your own words and not copied from the web please.
Optical fibers are
made from glass or plastic and generally have an index of
refraction of about 1.45. They are commonly used in
telecommunications and computer networks.
Identify and describe
a specific application for fiber optics? What kind of information
can they transmit? What advantages do they have over other
materials or technologies? Explain how optical fibers work and the
role of total internal reflection of light within.
Total internal reflection is behind the ability of optical
fibers to send signals over great distances. The are typically
formed by a core material of higher index than the "cladding"
material that surrounds the core. For an optical fiber with a core
index of 1.58 and a cladding index of 1.53. For a ray travelling
along the core, what is the minimum angle (in
degrees) of incidence against the cladding needed
to keep the light in the fiber? 75.55
As...