The GIGAC Industrial CWDM SFP Optical Transceiver Module is designed for fiber communication systems requiring efficient bandwidth utilization and long-distance transmission. By using Coarse Wavelength Division Multiplexing (CWDM) technology, the module allows multiple optical signals at different wavelengths to be transmitted simultaneously over the same fiber infrastructure, significantly increasing network capacity while reducing the need for additional fiber resources.

Packaged in a standard SFP form factor with LC duplex connectors, this fiber optic transceiver module is compatible with a wide range of carrier-grade and enterprise-class networking equipment. The series covers 18 CWDM wavelength channels from 1270nm to 1610nm with 20nm channel spacing, conforming to ITU-T G.694.2 — enabling seamless integration with existing CWDM MUX/DEMUX passive components.

 Technical Specs Summary ：

Key Features：

•        Data rates: 155Mbps, 622Mbps, 1.25Gbps, and 2.5Gbps

•        Standard SFP form factor with LC duplex optical interface

•        Hot-swappable — module replacement without system downtime

•        3.3V single power supply

•        Transmission distance over SMF: up to 120km, depending on the selected model

•        Low EMI and enhanced ESD protection

•        Built-in Digital Diagnostic Monitoring (DDM), SFF-8472 compliant

•        18 CWDM wavelengths: 1270nm to 1610nm, 20nm channel spacing (ITU-T G.694.2)

•        Pull-ring color-coded by wavelength for easy field identification

•        Military Industrial Grade (J): –40°C to +85°C

•        Extended Industrial Grade (M): –55°C to +85°C

Technical Advantages：

CWDM Multi-Wavelength Transmission

CWDM technology allows multiple wavelength channels to be transmitted over a single optical fiber, increasing network capacity while reducing fiber infrastructure costs. The GIGAC series covers the full 18-channel CWDM grid (1270–1610nm), enabling up to 18 independent data streams on a single fiber pair when paired with passive CWDM MUX/DEMUX units.

Long-Distance Transmission up to 120km

The module is available in transmission distance variants of 10km, 20km, 40km, 80km, and 120km. This extended reach makes it well-suited for metropolitan ring networks, inter-building backbone links, and carrier backhaul connections where long fiber spans must be covered without optical amplification.

Hot-Swap and DDM Real-Time Monitoring

All modules in the series support hot swapping, allowing field replacement without disrupting active network traffic. The built-in DDM interface (SFF-8472 compliant) provides real-time visibility into optical transmit/receive power, supply voltage, temperature, and laser bias current — enabling proactive fault detection and faster network maintenance.

Dual Industrial Temperature Grades

Military Industrial Grade (J: –40°C to +85°C) covers standard harsh-environment installations. Extended Industrial Grade (M: –55°C to +85°C) is designed for extreme-temperature environments such as outdoor telecom cabinets in cold-climate regions, rail trackside enclosures, and arctic deployments.

Typical Applications：

•        Metropolitan area network (MAN) backbone fiber infrastructure

•        CWDM wavelength multiplexing and routing systems

•        Enterprise core Ethernet switches and routers

•        SONET/SDH transport networks (155Mbps STM-1, 622Mbps STM-4, 2.5Gbps STM-16)

•        Gigabit Ethernet switching and campus backbone networks

•        Data center interconnection over dark fiber

•        Carrier-grade edge and aggregation network equipment

•        Industrial and enterprise fiber access networks

Compatibility and Deployment：

The GIGAC CWDM SFP series fits standard SFP cages in carrier-grade and enterprise-class switches, routers, and media converters. The DDM interface (SFF-8472) enables monitoring through standard NMS platforms from major vendors. Modules are interoperable with ITU-T G.652 single-mode fiber and passive CWDM MUX/DEMUX components following ITU-T G.694.2 channel spacing.

For wavelength-specific ordering, replace ** in the model number with the two-digit CWDM wavelength code: 27=1270nm, 29=1290nm, 31=1310nm, 33=1330nm, 35=1350nm, 37=1370nm, 39=1390nm, 41=1410nm, 43=1430nm, 45=1450nm, 47=1470nm, 49=1490nm, 51=1510nm, 53=1530nm, 55=1550nm, 57=1570nm, 59=1590nm, 61=1610nm. Contact our technical team for custom wavelength combinations or OEM configuration support.

Ordering Information：

Replace ** with 2-digit CWDM wavelength code (27=1270nm, 29=1290nm ... 61=1610nm). J = Military Industrial (–40°C), M = Extended Industrial (–55°C).

Verify all model numbers against the latest product datasheet before ordering. For OEM configurations or volume pricing, contact our technical sales team.

FAQ Module  ：

Q: What is a CWDM SFP optical transceiver module?

A: A CWDM SFP transceiver module uses Coarse Wavelength Division Multiplexing to transmit data on a specific wavelength channel over single-mode fiber. Multiple CWDM modules at different wavelengths can share the same fiber pair through a passive CWDM MUX/DEMUX unit, multiplying fiber capacity without additional cable infrastructure.

Q: What data rates does this CWDM SFP module support?

A: The GIGAC CWDM SFP series supports 155Mbps (SONET STM-1), 622Mbps (STM-4), 1.25Gbps (Gigabit Ethernet), and 2.5Gbps (STM-16). Select the appropriate model based on your required data rate and transmission distance.

Q: What is the maximum transmission distance?

A: The maximum transmission distance is 120km, available on specific 80km+ models over ITU-T G.652 single-mode fiber. Other distance options include 10km, 20km, 40km, and 80km. For links over 80km, optical link budget verification is recommended.

Q: How many CWDM wavelengths are available?

A: The series covers 18 CWDM wavelength channels from 1270nm to 1610nm with 20nm channel spacing, conforming to ITU-T G.694.2. Each module's pull ring is color-coded to its wavelength for easy identification during installation and maintenance.

Q: Does this module support hot swapping?

A: Yes. All modules in the CWDM SFP series support hot swapping — the module can be inserted or removed while the host device is powered on and running, without interrupting other active network channels.

Q: What temperature grades are available?

A: Two industrial temperature grades are available: Military Industrial Grade (J: –40°C to +85°C) for standard harsh environments, and Extended Industrial Grade (M: –55°C to +85°C) for extreme cold-climate deployments. Specify your required grade when ordering.

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