Product Overview
• Form Factor: QSFP-DD Type 2A, coherent
• Application: 400GBASE-ZR for metro/regional DWDM & DCI
• Line Rate: 425 Gbps (4×100G or 1×400G)
• Modulation: 60 GBaud DP-16QAM coherent
• Connector: Duplex LC
• Distance: Up to 120 km with EDFA, supports 3 dB channel insertion loss
• Power Supply: +3.3 V
• Power Consumption: = 17 W (= 3.5 W in low-power mode)
• Operating Case Temp: –5°C to +75°C
• Compliance:
o IEEE 802.3-2018 (400GAUI-8 / 100GAUI-2 electrical)
o OIF-400ZR-01.0, IEEE 802.3cw R2.0 coherent
o CMIS Rev. 5.0
o RoHS 2015/863/EU, Class 1M Laser

Key Features
• Full-spectrum C-band tunable coherent
• Supports 1×400GbE or 4×100GbE breakout (mode selectable)
• High performance with integrated DSP
• Digital Diagnostic Monitoring (DDM) via I²C
• Max OSNR: = 42 dB/12.5 GHz
• Tx tunable output power: –13 to –9 dBm
• Compact, hot-swappable QSFP-DD design

Optical Specifications
Transmitter:
• Frequency Range: 191.25–196.125 THz (C-band tunable)
• Fine Tuning: ±5 GHz, 0.1 GHz steps
• Spectral Width: = 35–66.7 GHz (depending on modulation)
• Laser linewidth: 500 kHz
• Tx Power Range: –13 to –9 dBm
• Output Power Step Size: 0.1 dB
• Output Power Stability: ±0.5 dB
Receiver:
• Rx Sensitivity: = –14 dBm (400G-E-ZR)
• Rx Input Range: –12 to +5 dBm (typical), tolerates transient ±4 dB
• ROSNR: = 23.7–26 dB/12.5 GHz
• CD Tolerance: ±2.4 ns/nm
• PMD tolerance: 10 ps mean
• PDL tolerance: = 3.5 dB
• SOP tracking: 50 krad/s

Electrical Specifications
• Interface: 4×100GAUI-2, 400GAUI-8, CEI-56G-PAM4-VSR compliant
• Power Supply Noise Tolerance: = 66 mVpp (10 Hz–10 MHz)
• Differential Output Load: 100 O

Digital Diagnostics
• Temperature: 0–70°C, ±3°C
• Voltage: 0–Vcc, ±3%
• Tx Bias Current: 0–100 mA, ±10%
• Tx Power: –2.9 to +4.0 dBm, ±3 dB
• Rx Power: –5.9 to +4.0 dBm, ±3 dB