9
Receiver Optical Characteristics
(T
C
= 0 °C to +80 °C, V
CC
= 3.3 V ± 5%, Typical T
C
= +40 °C, V
CC
= 3.3 V)
Parameter Symbol Min. Typ. Max. Unit Reference
Input Optical Power Sensitivity P
IN MIN
–18.5 -16 dBm avg. 1
Input Optical Power Saturation P
IN MAX
–2 –1 dBm avg. 2
Operating Center Wavelength l
C
830 860 nm
Stressed Receiver Sensitivity –15.5 -11.3 dBm 3
Stressed Receiver Eye Opening 120 190 ps 4
Return Loss 12 19 dB 5
Signal Detect
Asserted
De-asserted
Hysteresis
P
A
P
D
P
A
-P
D
-31
0.5
-19
-21
2
-17 dBm avg.
dBm avg.
dB
6
Notes:
1. Sensitivity is dened as the average input power with the worst case, minimum, Extinction Ratio necessary to produce a BER of 10
-12
at the
center of the Baud interval using a 2.5 GBd Pseudo Random Bit Sequence of length 2
23
– 1 (PRBS), or equivalent, test pattern. For this parameter,
input power is equivalent to that provided by an ideal source, i.e., a source with RIN and switching attributes that do not degrade the sensitivity
measurement. All channels not under test are operating receiving data with an average input power up to 6 dB above P
IN MIN
.
2. Saturation is dened as the average input power that produces at the center of the output swing a receiver output eye width less than 120 ps
where BER < 10
-12
using a 2.5 GBd Pseudo Random Bit Sequence of length 2
23
–1 (PRBS), or equivalent, test pattern.
3. Stressed receiver sensitivity is dened as the average input power necessary to produce a BER < 10
-12
at the center of the Baud interval using a
2.5 GBd Pseudo Random Bit Sequence of length 2
23
– 1 (PRBS), or equivalent, test pattern. For this parameter, input power is conditioned with
2.5 dB Inter-Symbol Interference, ISI, (min), 33 ps Duty Cycle Dependent Deterministic Jitter, DCD DJ (min) and 6 dB ER (ER Penalty = 2.23 dB).
All channels not under test are operating receiving data with an average input power up to 6 dB above P
IN MIN
.
4. Stressed receiver eye opening is dened as the receiver output eye width where BER < 10
-12
at the center of the output swing using a 2.5 GBd
Pseudo Random Bit Sequence of length 2
23
– 1 (PRBS), or equivalent, test pattern. For this parameter, input power is an average input optical
power of –10.7 dBm and conditioned with 2.5 dB ISI (min), 33 ps DCD DJ (min), 6 dB ER (ER Penalty = 2.23 dB). All channels not under test are
operating receiving data with an average input power up to 6 dB above P
IN MIN
.
5. Return loss is dened as the ratio, in dB, of the received optical power to the optical power reected back down the ber.
6. Signal Detect assertion requires all optical inputs to exhibit a minimum 6 dB Extinction Ratio at P
A
= –17 dBm. All channels not under test are
operating with PRBS 23 serial encoded patterns, asynchronous with the channel under test, and an average input power up to 6 dB higher than
P
IN MIN.