© The Institution of Electrical Engineers
Bit-error-ratio (BER) measurements have been demonstrated with all-optical clock recovery from a 3.2 Gbit/s NRZ sequence using two-contact semiconductor devices. A nonlinear optical amplifier generated the missing clock component in the NRZ modulation spectrum which then locked the output of a selfpulsating laser. BER measurements showed that the resulting dock signal was extremely pure and stable giving a 0.2 dB improvement in receiver sensitivity when compared to measurements using a dock from the transmitter. This type of optical dock recovery technique could have a major impact on future gigabit per second telecommunication systems.
References
-
-
1)
-
P.E. Barnsley ,
G.E. Wickens ,
H.J. Wickes ,
D.M. Spirit
.
A 4 × 5 Gb/s transmission system with all-optical clock recovery.
Photonics Technol. Lett.
,
1 ,
83 -
86
-
2)
-
M. Jinno ,
T. Matsumoto
.
Optical retiming regenerator using 1.5 μm wavelength multielectrode DFB LD's.
Electron. Lett.
,
20 ,
1332 -
1333
-
3)
-
Barnsley, P.E., Marshall, I.W., Fiddyment, P.J., Robertson, M.J.: `Absorptive nonlinear semiconductor devices for fast optical switching', SPIE, 1990, 1378, p. 116–126, Optically activated switching.
-
4)
-
P.E. Barnsley ,
P.J. Fiddyment
.
Clock extraction using saturable absorption in a semiconductor nonlinear optical amplifier.
Photonics Technol. Lett.
,
9 ,
832 -
834
-
5)
-
M. Jinno ,
T. Matsumoto ,
M. Koga
.
All-optical timing extraction using an optical tank circuit.
Photonics Technol. Lett.
,
3 ,
203 -
204
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