Optical Time Division Multiplexing - Northumbria University
Optical Time Division Multiplexing - Northumbria University
Optical Time Division Multiplexing - Northumbria University
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B- Terahertz <strong>Optical</strong> Asymmetric Demultiplexer<br />
(TOAD)<br />
• CW through SLA will face phase shift<br />
• The SW window size = 2n∆x/c<br />
(~ a few ps)<br />
• Timing between control and data<br />
Pulses are critical<br />
• SLA recovery time is large ~300 500<br />
ps<br />
G<br />
TOAD<br />
Control<br />
Pulse λc<br />
Data<br />
In λs<br />
CW<br />
Fibre<br />
loop<br />
Coupler<br />
∆x<br />
SLA<br />
CCW<br />
PC<br />
Data<br />
out<br />
( θ − θ )<br />
[ ]<br />
G + G − 2 G G<br />
1<br />
= cos<br />
4 cw ccw cw ccw<br />
cw<br />
ccw
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