PPT Slide

Jitter in optical source and shot noise in optical detector

White

noise

Jitter noise

s = 10 fs, 100 fs, 1 ps

Nb = Number of bits

wRF = Maximum signal frequency

Dt = Timing jitter (peak-to-peak)

For 20 GHz signal, Nb = 8

Dt < 31 fs

4 GHz

Detector

Shot noise

S

P = Input power per channel

Dt = Sampling interval

E = Particle energy

0.8 eV for l = 1550 nm

For Nb = 8 and 8 GS/s P = 0.1 mW

P = 1 mW gives Nb = 9.6

2s

Prob.

Jitter

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