Q400G-ZRP-DCO-hp – 400G QSFP-DD ZR+ Pro Coherent Transceiver, C-Band

Q400G-ZRP-DCO-hp is a high-performance 400G QSFP-DD ZR+ Pro coherent transceiver designed for long-reach IP-over-DWDM and data center interconnect applications. Supporting line rates from 100G to 400G and advanced coherent modulation formats up to DP-16QAM, the module enables scalable transport across metro, regional, and long-haul networks without the need for inline chromatic dispersion compensation.The transceiver is fully compliant with Open ZR+ MSA, OIF 400ZR, and QSFP-DD MSA standards and features an integrated coherent DSP, tunable C-band laser, EDFA, and VOA. With high output power, fine wavelength tuning, and robust optical impairment tolerance, it supports amplified DWDM links .

Product Overview
• Form Factor: QSFP-DD, Type 2B package
• Application: 100G/200G/300G/400G coherent optical transport (Metro & Long-Haul DWDM, DCI)
• Line Rate: 100G / 200G / 300G / 400G
• Client Rate: 1/2/3/4×100GbE or 1×400GbE
• Connector: Duplex LC
• Power Supply: +3.3 V
• Power Consumption: 22–22.5 W (400G mode)
• Operating Case Temp: 0°C to +75°C
• Compliance: QSFP-DD MSA, OpenZR+ 2.0, OIF-400ZR-02.0, CMIS 5.2, IEEE 802.3-2018

Key Features
• C-Band Tunable (191.3–196.1 THz)
• Supports 100/75/50 GHz DWDM grid, 0.1 GHz fine tuning
• Integrated EDFA (optical amplifier) for high Tx power
• TX VOA inside, output power adjustable –10 to +1 dBm (tunable), up to +4 dBm at 193.7 THz
• Supports OFEC & CFEC FEC
• Hot-pluggable, compact size (18.35 × 93.26 × 8.50 mm)
• Digital diagnostics via I²C interface
• Hitless firmware upgrade supported

Optical Performance
Transmitter:
• Modulation:
o 400G DP-16QAM
o 300G DP-8QAM
o 200G DP-QPSK
o 100G DP-QPSK
• Baud Rate: ~60 GBd (30 GBd for 100G)
• Output Power: –10 to +1 dBm tunable (ZR+), up to +4 dBm in Gray mode
• Linewidth: 300 kHz ultra-narrow tunable laser
• In-band OSNR: = 38 dB
• Power stability: ±0.5 dB

Receiver:
• Input Range (DWDM amplified):
o 400G: –12 to 0 dBm (ZR), OSNR > 26 dB
o 400G ZR+: –12 to 0 dBm, OSNR > 24 dB
o 300G: –15 to 0 dBm, OSNR > 21 dB
o 200G: –18 to 0 dBm, OSNR > 16 dB
o 100G: –18 to 0 dBm, OSNR > 12.5 dB
• Input Range (Unamplified Gray): –22 to 0 dBm
• RX Sensitivity: –20 dBm (400G ZR), –22 dBm (ZR+)
• Dispersion Tolerance:
o 400G ZR: 2,400 ps/nm
o 400G ZR+: 20,000 ps/nm
o 300G: 40,000 ps/nm
o 200G: 50,000 ps/nm
o 100G: 100,000 ps/nm
• DGD tolerance: up to 100 ps

Transmission Distance
• 400G ZR (DWDM amplified): up to ~120 km
• 400G ZR+ (DWDM amplified): up to ~450 km
• 300G ZR+: up to ~600 km
• 200G ZR+: up to ~1000 km
• 100G ZR+: up to ~2000 km
• 400G ZR Gray (unamplified): ~80 km
• 400G ZR+ Gray (unamplified): ~90 km

Digital Diagnostics & Alarms
• Temp warning: 0–75°C
• Voltage warning: 3.135–3.465 V
• Tx Power: configurable thresholds (±2 dB warning, ±3 dB alarm)
• Rx Power: configurable thresholds (default –24 dBm warn, –26 dBm alarm)
• Laser temperature alarm: –10 to +80°C