Alcatel-Lucent 3HE04939CE 1550nm CWDM SFP Transceiver – Complete Overview
The Alcatel-Lucent 3HE04939CE is a high-performance Small Form-factor Pluggable (SFP) optical transceiver designed for Gigabit Ethernet (1000BASE) applications in the 7750 SR-12 and other compatible carrier-grade platforms. This module operates at a nominal wavelength of 1550 nm, which is part of the Coarse Wavelength Division Multiplexing (CWDM) grid, enabling multiple wavelengths to be combined over a single fiber. It is an ideal solution for metro and regional network links requiring cost-effective WDM transport.
At the optical core, the transceiver features a 1550 nm DFB (Distributed Feedback) laser with a built-in wavelength locker to maintain precise wavelength stability over temperature and aging. The laser is coupled to single-mode fiber through a standard duplex LC connector. The receiver uses a PIN photodiode with a transimpedance amplifier (TIA) and limiting amplifier, providing a typical sensitivity of -25 dBm at 1.25 Gbps. The link distance reaches up to 80 km (depending on fiber quality and dispersion), making it suitable for long-haul connections.
The transceiver complies with the SFP Multi-Source Agreement (MSA) and supports 1.25 Gbps data rates with 8B/10B encoding. It includes digital diagnostics monitoring (DDM) per SFF-8472, providing real-time measurements of temperature, supply voltage, laser bias current, transmit power, and receive power. These values can be accessed via the I²C bus for proactive maintenance and fault prediction.
Power consumption is low – typically 0.8 W at 3.3 V. The module includes transmitter disable and receiver signal detect functions, and is hot-pluggable. The metal housing provides ESD protection and EMI shielding.
Reliability is ensured through rigorous testing per GR-468-CORE, with an MTBF exceeding 1 million hours. The transceiver is RoHS compliant and meets Class 1 laser safety (IEC 60825-1).
Installation is plug-and-play; the host device automatically identifies the transceiver and configures appropriate settings. The module is compatible with many vendors' CWDM systems, though performance is optimized in Alcatel-Lucent chassis.
Typical applications include wavelength routing in metro rings, interconnecting data centers, and extending Ethernet services over existing fiber plant. The 1550 nm wavelength is also commonly used for overlay networks.
In conclusion, the Alcatel-Lucent 3HE04939CE CWDM SFP transceiver offers a reliable, cost-effective optical interface for Gigabit Ethernet over long distances, with comprehensive diagnostics and broad compatibility, making it a valuable component for any service provider's WDM toolbox.
