Pigtail

400G QSFP-DD FR4 2km LC Optical Transceiver‌ The ‌400G QSFP-DD FR4 2km‌ transceiver is a high-performance optical module designed for long-distance 400 Gigabit Ethernet applications. It leverages ‌PAM4 modulation‌ and ‌CWDM EML lasers‌ to achieve ‌2km transmission‌ over single-mode fiber (SMF), complying with IEEE 802.3bs & QSFP-DD MSA standards. Applications:‌ Data center interconnects‌ between remote sites. 5G fronthaul/midhaul‌ networks requiring high-bandwidth, low-latency links. Enterprise and cloud service provider‌ infrastructures scaling to 400G. RoHS compliant‌ and engineered for future-proof networking, this transceiver enables seamless migration to next-generation 400G architectures. QSFP-DD MSA compliant  Compliant to 100G Lambda MSA  400G FR4 Specification compliant  4 CWDM lanes MUX/DEMUX design  8x53.125Gb/s PAM4 electrical inter- face (400GAUI-8)  Maximum power consumption 12W  LC duplex connector  Supports 425Gb/s aggregate bit rate  Up to 2km transmission on single mode fiber with FEC  Single 3.3V power supply  RoHS compliant 200G QSFP56 SR4 100M 400G QSFP-DD SR8 100M 400G QSFP-DD DR4 2KM 400G QSFP-DD LR4 10KM 400G OSFP SR8 100M 200G 400G 400G 400G 400G 100M 100M 2KM 10KM 100M 850nm 850nm 1310nm CWDM 850nm MPO MPO MPO LC MPO MM MM SM SM MM DDM DDM DDM DDM DDM COM: 0°C ~70°C COM: 0°C ~70°C COM: 0°C ~70°C COM: 0°C ~70°C COM: 0°C ~70°C FAQ: Q1: What is 400G QSFP-DD? A1: It is a high-density, hot-pluggable optical module interface supporting 400Gbps data rates, featuring 8 electrical channels for enhanced bandwidth. Q2: What are the main types of 400G QSFP-DD modules? A2: Common variants include SR8 (short-range), DR4/FR4 (intermediate), LR4/LR8 (long-range), and ER4/ER8 (extended-reach), with transmission distances ranging from 100m to 40km. Q3: How does OSFP differ from QSFP-DD?‌ A3: OSFP has a larger form factor and non-compatible electrical interfaces, while QSFP-DD is backward-compatible with QSFP28 modules. Q4:What encoding scheme does 400G OSFP use?‌ A4: Data Rate 53.125Gbps (PAM4) per channel(Maximum power consumption 12W), balancing speed and complexity. Q5: What is the maximum transmission distance for 400G QSFP-DD LR4? A5: The LR4 variant supports up to 10km over single-mode fiber (SMF) using 4x106Gbps lanes, ideal for 5G and cloud interconnects.  (https://www.etulinktechnology.com/400g-qsfp-dd-lr4-10km-lc-optical-transceiver_p330.html) Q6: What is the electrical interface of QSFP-DD? A6: The module converts 8 channels of 50Gb/s (PAM4) electrical input data to 4 channels of CWDM optical signals and multiplexes them into a single channel for 400Gb/s optical transmission. Q7: Does QSFP-DD support digital diagnostics? A7: Yes, it includes DDM (Digital Diagnostic Monitoring) per MSA standards, enabling real-time monitoring of temperature, voltage, and optical power. Q8: What DAC options exist for 400G QSFP-DD? A8: Available configurations include direct QSFP-DD-to-QSFP-DD, or breakout to 2x200G QSFP56/4x100G QSFP56/8x50G SFP56 for flexible scaling. Q9: How does OSFP differ from QSFP-DD?‌ A9: OSFP has a larger form factor and non-compatible electrical interfaces, while QSFP-DD is backward-compatible with QSFP28 modules.

Duplex LC interface and hot-pluggable design, it integrates a high-power DFB laser and APD photo detector with advanced dispersion management to ensure signal integrity over ultra-long reaches.

High-speed breakout connectivity solution designed to split a single 40G QSFP+ port into four independent 10G SFP+ channels. 

The LWDM technology provides an effective balance between channel capacity and system cost, offering network operators a reliable, scalable solution.

Utilizing four 25.78Gbps wavelengths multiplexed into a single fiber pair via LC connectors. It supports transmission distances up to 10 kilometers over single-mode fiber, complying with the 100GBASE-LR4 standard.

Utilizing Parallel Single-Mode 4-lane (PSM4) technology, it operates at 1310nm wavelength across four independent parallel channels (each at 10Gbps) to achieve an aggregate 40Gbps data rate, supporting reaches up to 10 kilometers.