All-optical lip-lops based on semiconductor technologies
371
noise figure, followed by a VOA, a BPF and a photo-receiver, whose input power is kept
constant (by means of the VOA) at -16.7dBm in order to avoid thermal noise. As shown in
Right:, making a comparison with the back-to-back case, the maximum penalty at BER=10
-9
is about 1dB, making the switch driven by the ultra-fast all-optical flip-flop suitable for
cascaded schemes.
-10
-9
-8
-7
-6
-5
-4
-38
-37
-36
-35
-34
-33
-32
-31
B to B
OUT 1 CROSS
OUT 1 BAR
received power (dBm)
Lo
g
10
(B
E
R
)
-10
-9
-8
-7
-6
-5
-4
-38
-37
-36
-35
-34
-33
-32
-31
B to B
OUT 1 CROSS
OUT 1 BAR
received power (dBm)
Lo
g
10
(B
E
R
)
Fig. 29. Left: eye-diagrams of inputs 1 and 2 data frames (a)-(b) and output 1 in BAR (c) and
CROSS (d) configurations of the 2×2 all-optical switch. Right: BER curves in the back-to-
back (B to B) case and at switch output 1 in BAR and CROSS configurations.
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Edited by Jan Grym
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