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Bit rate-adaptive 3R O/E/O transponder accomplishing full data rate transparency from 30 Mb/s to 2.5 Gb/s

This paper presents the design and development of a bit rate transparent 3R O/E/O transponder, which accomplishes full data rate transparency from 30Mb/s to 2.5Gb/s by signal processing in electronic domain. With the use of chipsets that perform clock recovery in several continuous bit rate ranges, we develop a clock and data regenerating circuit self-adaptive to the bit rate of input signal. Experimental results presented in the last section of this paper show us that a good bit rate-adaptive capability and good BER performance can be achieved.