Polarization-Insensitive Phase-Transmultiplexing and Multicasting of CSRZ-OOK and 4 <formula formulatype="inline"><tex Notation="TeX">$\times$</tex></formula> RZ-BPSK to 4 <formula formulatype="inline"><tex Notation="TeX">$\times$ </tex></formula> RZ-QPSK via XPM in a Birefringent PCF

Abstract

By utilizing cross-phase modulation and birefringence, we demonstrated simultaneous polarization-insensitive phase-transmultiplexing and multicasting of a single 10-Gbaud CSRZ-OOK signal and 4 $\times$ 10-Gbaud RZ-BPSK signals to generate 4 $\times$ 10-Gbaud RZ-QPSK signals in a photonic crystal fiber. The measured receiver sensitivity OSNR penalty at BER of $10^{-9}$ was $\approx$1.8 dB, relative to the FPGA-precoded RZ-DQPSK baseline, for a randomly polarized CSRZ-OOK signal, when the launch angles of all RZ-BPSK signals were fixed at $ \approx\!45^{\circ}$. In addition, the OSNR of the remotely generated CSRZ-OOK signal could be degraded down to $\approx$34 dB/0.1 nm, before the BER performance of the phase-transmultiplexing and multicasting operation began to degrade.

Keywords

• Fiber nonlinear optics
• fiber optics systems
• Kerr effect