Juniper M120 - Page 76

Table 20: Optical Interface Support for 10-Gigabit Ethernet PICs with XENPAK-OTNs (continued)
■
Transmitter type: Electro-absorption Modulated Laser (EML)
■
Modulation format: Non-retum-to-zero (NRZ)
■
Channel-plan wavelength range: 1551.72 through 1542.94 nm
■
Channel-plan frequency range: 193.2 through 194.3 THz
■
Channel spacing: 100 GHz
■
Channel tunability: 2 channels
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Output power (on): 0 to + 3 dBm
■
Output power (off): ≤−40 dBm
■
Output power stability: ±0.6 dB
■
Wavelength accuracy: ±100 pm
■
Tuning time: Warm tune – 10 seconds; Cold start – 40 seconds
■
Extinction ratio: ≥ 9 dB
■
Side-mode suppression ratio: ≥ 30 dB
■
Jitter generation compliance: GR-253/G.8251
Optical transmitter
■
Receiver type: Avalanche photodiode (APD)
■
Jitter tolerance compliance: GR-53/G.8251/802.3ae (LAN PHY)
■
Rx DTV setting: Auto
■
Rx wavelength range: 1527 to 1567 nm
■
Overload: −5 dBm
■
Damage input power: +5 dBm
■
Optical return loss: ≥ 27 dB
Optical receiver
Optical Applications—Power-Limited Receiver:
■
Sensitivity: −28 dBm (>33dB/0.1 nm OSNR, 0 ps/nm CD, 10
−15
post-FEC BER)
■
Chromatic dispersion (CD) power penalty: 3 dB (typical penalty at +1600 ps/nm and
−700 ps/nm CD)
Optical Applications—Noise-Limited Receiver:
■
Required OSNR: 16 dB/0.1 nm (−8 to −20 dBm Rx input power, 0 ps/nm CD, 10
−15
post-FEC BER)
■
CD OSNR penalty: 4 dB (typical penalty at +1500 ps/nm and −700 ps/nm CD with Rx
input power from−8 to −20 dBm). For more detailed information, see
Table 21 on page 76.
Optical performance
Table 21: XENPAK-OTN Optical Signal-to-Noise Ratio (OSNR) Performance
CD Tolerance
(ps/nm)
Input-Power
Range
(dBm)
Post-FEC
BER
Pre-FEC
BER
FEC TypeOSNR (dB/0.5
nm)
OSNR (dB/0.1
nm)
0–5 to –2810
–15
10
–5
GFEC2633
–700 to +1600–5 to –2610
–15
10
–5
GFEC2633
0–8 to –2010
–15
10
–5
GFEC916
76 ■ 10-Gigabit Ethernet PIC with XENPAK
M120 Internet Router PIC Guide