Yiyuan 400G QSFP-DD FR4 1310nm 2km LC Duplex Single-Mode Optical Transceiver

Yiyuan 400G QSFP-DD FR4 Single-Mode Optical Transceiver | PAM4 | 1310nm | 2km | LC Duplex | DOM

The Yiyuan 400G QSFP-DD FR4 transceiver delivers 400Gbps over 2km of OS2 single-mode fiber (SMF) using 4-wavelength CWDM4 technology over standard LC duplex connectors. Engineered for data center interconnect (DCI), campus backbones, and enterprise core networks requiring extended SMF reach without replacing duplex fiber cabling infrastructure.

Key Features

• 2km Extended Single-Mode Reach: Delivers 400Gbps over standard duplex SMF, ideal for campus-scale backbone links and inter-building DCI.
• CWDM4 Multiplexing Efficiency: Multiplexes 4×100G optical lanes onto a single duplex fiber pair, significantly saving optical cabling costs compared to parallel MPO solutions.
• Universal LC Duplex Interface: Directly compatible with existing LC patch panels and structured telecom fiber plant.
• Host Coding: Coding available for Cisco, Arista, NVIDIA Mellanox, Juniper, or Dell switches; we check coding for your switch model before you order.
• Digital Optical Monitoring (DOM): Comprehensive real-time monitoring of operating temperature, supply voltage, laser bias current, and TX/RX optical power.

Technical Specifications

Parameter	Specification Value
Model & Part Number	400G QSFP-DD FR4
Data Rate	400Gbps (4×100G PAM4)
Form Factor	QSFP-DD Type 2
Wavelength Grid	CWDM4 (1271nm, 1291nm, 1311nm, 1331nm)
Fiber Type	Single-Mode Fiber (SMF, OS2 / G.652)
Transmission Distance	2km
Optical Connector	Standard LC Duplex
Modulation Scheme	4×100G-PAM4 CWDM
Power Consumption	≤10W
Power Supply Voltage	3.3V DC
Transmitter & Detector	CWDM EML Transmitter & PIN Receiver
Management Interface	CMIS 4.0 / CMIS 5.0
Operating Case Temperature	0°C ~ 70°C (32°F ~ 158°F) Commercial Grade
Standards & Protocols	QSFP-DD MSA, 100G Lambda MSA 400G-FR4, IEEE 802.3bs
Digital Optical Monitoring (DOM)	Supported
Coding Available For	Cisco, Arista, NVIDIA Mellanox, Juniper, Dell

400G Single-Mode Architecture Comparison

Specification	400G QSFP-DD FR4 (This Model)	400G QSFP-DD DR4	400G QSFP-DD LR4
Transmission Distance	2km	500m	10km
Fiber Connector	LC Duplex (2 Fibers)	MPO-12/APC (8 Active Fibers)	LC Duplex (2 Fibers)
Optical Multiplexing	CWDM4 (Wavelength Mux)	Parallel Single-Mode (PSM4)	LWDM4 / LAN-WDM
Fiber Infrastructure Cost	Low (Reuses existing 2-fiber LC plant)	Requires parallel MPO-12 trunking	Low (Reuses existing 2-fiber LC plant)
Target Application	Campus Backbone & Inter-building DCI	Intra-Building Spine-Leaf & Breakout	Metro Edge & Telecom Core

Quality Assurance & Testing

Each module is tested before dispatch. Our test process includes 3D end-face interferometry, optical eye-diagram checks, bit error rate checks, and switch port link testing. Ask us for test records for this SKU. Engineering support is available when you inquire.

Custom Coding & Sample Inquiries

We provide custom EEPROM coding for Cisco, Arista, NVIDIA Mellanox, Juniper, or Dell hosts. Compatibility depends on the host platform. Please share your switch model, software version, module type, link distance and fiber type so we can check coding and compatibility before you order. YYGL Optical is an independent optics supplier; we are not those brands and we do not claim affiliation with them. For volume pricing, project sample requests, or custom cabling configurations, please submit an inquiry or contact our engineering sales team.

Frequently Asked Questions & Interoperability

Q: How does YYGL Optical ensure 400G QSFP-DD transceiver compatibility with Cisco Nexus 9000 and Arista switches?
A: YYGL Optical programs custom EEPROM vendor coding into each 400G QSFP-DD module to ensure non-alarm recognition on Cisco Nexus 9300/9400 series (supporting service unsupported-transceiver bypass when required) and Arista EOS hosts. Built with high-reliability COB packaging, our 400G modules deliver lower thermal resistance and typical power consumption under 10W.

Q: Does YYGL Optical support custom EEPROM programming for mixed-vendor data center architectures?
A: Yes. Because modern hyperscale fabrics frequently deploy mixed switch platforms, our engineering team offers bespoke firmware flashing for multi-vendor environments, allowing seamless link establishment across disparate spine-leaf tiers.