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All-optical NRZ-to-PRZ converter at 10 Gb/s based on self-phase modulation of Fabry-Pe´rot laser diode

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4 Author(s)
Yong Deok Jeong ; Sch. of Eng., Inf. & Commun. Univ., Daejeon, South Korea ; Hyuek Jae Lee ; Hark Yoo ; Yong Hyub Won

We propose and demonstrate nonreturn-to-zero (NRZ) to pseudoreturn-to-zero (PRZ) data format conversion at 10 Gb/s based on transverse-magnetic (TM) mode absorption and self-phase modulation (SPM) in a Fabry-Pe´rot laser diode (FP-LD). An FP-LD has absorption nulls for TM mode injected beam and the beam having NRZ data experiences SPM, which induces a frequency chirp at every rising edge and falling edge. By extracting the chirp components, all-optical NRZ-to-PRZ format conversion has been achieved. The resultant PRZ data gives well-defined 10-Gb/s clock signal. This method will be very useful in all-optical clock recovery of high-speed optical communication systems.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 4 )