Abstract
We propose and experimentally demonstrate mutual optical format conversion between signals
characterized as 10-Gb/s nonreturn-to-zero on-off-keying (NRZ-OOK) and NRZ binary phase-shift keying (BPSK)
types. The conversion is based on stimulated Brillouin scattering (SBS) in a single-mode optical fiber. An OOK
signal is converted into a BPSK signal through optical carrier absorption, for which a SBS loss of 30 MHz is
used in long-haul transmission. The converted BPSK signal is reverted to an OOK signal with a corresponding
SBS gain of 30 MHz for direct detection. The proposed OOK-to-BPSK and BPSK-to-OOK format conversions can be
implemented in transmitter and receiver nodes by using a laser source as the Brillouin pump.
© 2013 Chinese Optics Letters
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