Characterisation of an optical clock recovery method based on a mode-locked laser diode using spectrographic pulse measurement.
As channels rates in optical networks are expected to exceed 100 Gb/s in the near future, new optical techniques for clock recovery will have to be developed for optical regeneration. This paper describes an optical clock recovery method based on a mode-locked laser diode. Experimental results show that a 42 GHz high quality optical clock can be retrieved from a 170 Gb/s OTDM data signal. Chirp transfer between the incident signal and the recovered clock signal is investigated using the SHG-FROG method. Results demonstrate that this clock recovery technique is invariant to input dispersion varying between +/-75 ps/nm, making it ideal for use in 3R regenerators.
Maguire
P J
PJ
Research Institute for Networks and Communications Engineering, Dublin City University, Dublin 9, Ireland. maguirep@eeng.dcu.ie
Roncin
V
V
O'Hare
A
A
Reid
D
D
Lobo
S
S
Gay
M
M
Bramerie
L
L
Barry
L P
LP
Simon
J C
JC
D004867:Equipment Design; D019544:Equipment Failure Analysis; D005246:Feedback; D054023:Lasers, Semiconductor; D055095:Optics and Photonics / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013057:Spectrum Analysis / Q000295:instrumentation*