11-03-2012, 01:22 PM
I am Dibash Bordoloi,a student of B.E final semester.I want the documents of the topic"Optical serial to parallel conversion technique with phase shifted preamble for optical label switching systems".So, I want the documents of the topic to make my seminar report.
The abstract is:
Abstract—We have investigated the fundamental operation of
optical serial-to-parallel converter (OSPC) scheme with phaseshifted
preamble, and its application to optical label switching
operation. The OSPC consists of a π/2 phase-shifted preamble
at the top of the packet generated at a transmitter-side, and
a −π/2 phase-biased Mach-Zehnder delayed interferometer with
the delay length of the timing position of the gated bit followed by
a balanced photodetector at a receiver-side. Firstly, we simulated
the fundamental performance of the OSPC. The possibility of
the serial-to-parallel operation was confirmed. The operation
tolerance against the optical phase discrepancy from the ideal
conditions, waveguide loss, extinction ratio, and chirp of the
input signal were considered. Then, OSPC operation was experimentally
investigated. 4-bit operation could be achieved with
a suppression ratio of 8 dB in case of the input signal extinction
ratio of 13 dB. For the purpose of verifying if the OSPC worked
stably and if it could apply to optical label switching systems,
packet transfer operation at a bit rate of 40 Gb/s with 2-bit label
was also investigated, and we achieved error-free performance
successfully for the first time.
