Design Of An Optical Receiver For The Fiber To The Home (Ftth) Switch
Fiber to the home (FTTH) architecture provides the full set optical telecommunication services (narrowband and broadband) up to customer premises across the local access services. The main challenge to the realization of FTTH is the cost. However, as the installation cost of the optical fiber tec...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2002
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/12141/1/FK_2002_94_A.pdf |
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| Summary: | Fiber to the home (FTTH) architecture provides the full set optical
telecommunication services (narrowband and broadband) up to customer premises
across the local access services. The main challenge to the realization of FTTH is the
cost. However, as the installation cost of the optical fiber technology decreases, FTTH
started to gain its reputation as the future communication infrastructure. Once
implemented, FTTH architecture needs to maintain its reliability and connectivity.
These responsibilities are given to FTTH switch; a network device in the FTTH network
that provides very fast inter-connectivity and excellent backup features. One main
component of the switch is the optical receiver to receive the optical signal from any
locations, either from the central office or the premises and convert the signal to its
electrical form to be processed by the switch. Therefore, the objective of the research is
to design the optical receiver for the FTTH switch.
In this thesis, the intended bandwidth by the receiver is specified at 155 MHz.
The other performance parameters concerned are signal to noise ratio (SNR) and
sensitivity . The main components of the receiver are PIN photodetector, transimpedance amplifier and post amplifier. PIN photo detector is used as the optical detector to convert
the optical signal into its electrical form. Meanwhile, trans impedance amplifier is the
photo current to voltage converter. The function of the post amplifier is to amplify the
electrical signal. Besides that, additional circuit configuration and topology are applied
to improve the performance of the receiver.
The optical receiver design was broken into a few modules. Each of them was
developed step by step based on two approaches. They are software simulation and
hardware implementation (experiment). The receiver performance was analysed based
on the results produced by each approach.
The final results on the optical receIver system show that the performance
standard (I55 MHz bandwidth) was achieved by the simulation approach. However the
experiment only manage to support the bandwidth around 126 MHz. The SNR and
sensitivity measured from the experimental circuit also give a lower performance
compared to the simulation.
Based on the experimental results, a few solutions are suggested to increase the
optical receiver performance. Meanwhile, the application of the designed optical
receiver in the other area is also investigated. |
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