Technical Specs Summary

Detailed Product Description

  Product Overview

The GIGAC EML+TEC DWDM Optical Transceiver is a high-performance pluggable fiber optic module series integrating an EML (Electro-absorption Modulated Laser) transmitter, TEC (Thermo-Electric Cooler), optical receiving module, limiting amplifier, and microcontroller within a compact SFP or SFP+ form factor. It supports multiple wavelength grids including CWDM and DWDM, and is designed for long-haul and ultra-long-haul optical transmission applications.

The module's block diagram integrates four functional subsystems: the EML laser transmitter driven by a CDR (Clock and Data Recovery) IC; the TEC for precise laser temperature stabilization; a microcontroller managing automatic power control, bias control, and alarm functions; and the optical receiver chain comprising the receiving module and limiting amplifier for the returning signal path. This integration provides the full performance required for 40km access, 80km metro, 400km backbone, and 600km ultra-long-haul DWDM links.

Available in both single-fiber and dual-fiber configurations, with ROADM (Reconfigurable Optical Add-Drop Multiplexer) compatible variants for deployment in software-defined wavelength routing architectures. Industrial temperature grade (–40°C to +85°C) is available across the product series, supporting deployments in outdoor equipment rooms and industrial facilities.

Key Features

EML (Electro-absorption Modulated Laser) transmitter — low chirp, long-reach performance

Integrated TEC — precise laser temperature and wavelength stabilization

Internal microcontroller — APC, bias control, alarm, DDM management

Optical receiving module + limiting amplifier (LA)

Data rates: 2.5G (STM-16)  |  10G (STM-64)  |  40G  |  100G

Wavelengths: CWDM  |  DWDM 50GHz / 100GHz ITU-T C-band grid

Transmission distance: 40km / 80km / 400km / 600km (model dependent)

Single-fiber (simplex) and dual-fiber (duplex) configurations

ROADM-compatible variants for wavelength-routed network deployment

Flexible digital output — multi-platform integration

DDM (Digital Diagnostic Monitoring) supported

Industrial temperature: –40°C to +85°C

Standards: SDH/SONET / 100GbE / 40GbE / DWDM / Coherent

Technical Advantages

EML Laser — Low Chirp for Long-Haul DWDM

An Electro-absorption Modulated Laser (EML) produces amplitude-modulated optical signals with significantly lower frequency chirp than directly modulated DFB lasers. Low chirp reduces chromatic dispersion penalties over long fiber spans, extending achievable transmission distance without dispersion compensation in DWDM metro and backbone links. This makes EML-based modules the standard transmitter technology for SDH STM-64/STM-256 and 100G Ethernet DWDM long-haul applications.

Integrated TEC — Wavelength Stability Across Temperature

The integrated TEC (Thermo-Electric Cooler) maintains the EML laser junction at a precise temperature setpoint regardless of ambient temperature variation. This ensures that the laser emission wavelength remains within the ITU-T DWDM channel grid tolerance (typically ±12.5GHz on a 50GHz grid) across the full –40°C to +85°C operating range — a critical requirement for DWDM systems where wavelength drift can cause channel crosstalk and system Q-factor degradation.

Microcontroller Integration — Automated Performance Management

The integrated microcontroller continuously manages APC (Automatic Power Control), bias current, TEC setpoint, and alarm generation without host-side intervention. This simplifies equipment design, reduces real-time software overhead in the host system, and provides standardized DDM parameter reporting via the 2-wire management interface for remote monitoring in network management systems (NMS).

600km Reach — Ultra-Long-Haul Without External Transponders

The 100G coherent-compatible models achieve up to 600km over amplified DWDM line systems — enabling inter-city backbone fiber links, core network optical bypass, and submarine cable aggregation within a pluggable SFP/SFP+ module format. This eliminates the need for external stand-alone transponder equipment in architectures where 600km reach can be achieved with sufficient OSNR.

ROADM-Compatible Variants — Software-Defined Wavelength Routing

ROADM (Reconfigurable Optical Add-Drop Multiplexer) compatible module variants enable wavelength assignment and routing to be controlled dynamically by the network management system without physical fiber reconnection. This supports software-defined networking (SDN) wavelength provisioning in modern carrier and cloud backbone networks where optical path reconfiguration must be performed remotely and rapidly.

DWDM Wavelength Grid Reference  (Partial — C-Band 50GHz Grid)

Each module variant corresponds to a specific ITU-T C-band center frequency. Select lane number at order time.

Full DWDM channel table from C-Band Lane 1 to 80+ available from our technical team. CWDM wavelength variants (1270nm–1610nm, 20nm spacing) also available in the series.

Typical Applications

SDH/SONET STM-16 / STM-64 / STM-256 long-haul optical line interfaces

100G Ethernet (100GbE) DWDM metro and backbone links

40G Ethernet (40GbE) long-haul DWDM transmission

ROADM-based wavelength-routed backbone network nodes

Inter-city backbone fiber DWDM links (400km–600km)

Coherent DWDM aggregation and submarine cable landing station equipment

Cloud provider backbone inter-data-center wavelength services

Carrier-grade DWDM access and metro ring nodes

Compatibility and Deployment

The EML+TEC DWDM transceiver series is available in SFP and SFP+ form factors, compatible with standard SFP/SFP+ host slots in routers, switches, and DWDM line cards. ROADM-compatible variants include the necessary management interface extensions for wavelength switching integration. DDM parameters are accessible via the standard 2-wire management interface.

For deployment: specify data rate, DWDM channel (C-Band lane number or CWDM wavelength), required distance, single or dual fiber, and temperature grade. ROADM variant availability and OSNR budget calculations are available from our technical team. Contact us for OEM volume support or custom configurations.

Industrial Optical Module Assembly Line

High-Precision Fiber Assembly

Automated Manufacturing for Consistency

100% Functional & Reliability Testing