Dual Fiber 18CH CWDM MUX / DEMUX

Product Introduction

The Dual Fiber 18CH CWDM MUX / DEMUX is a passive coarse wavelength division multiplexing device designed to transmit up to 18 different optical services over a pair of optical fibers. It operates across the 1270–1610 nm wavelength range with 20 nm channel spacing and is designed for point-to-point optical transmission.

By combining multiple CWDM wavelengths onto two optical fibers, the device helps optimize limited fiber resources while supporting multiple services through the same fiber pair. It is suitable for applications involving Ethernet, SDH/SONET, Fiber Channel, OTN, and other compatible optical services.

The equipment uses Thin Film Filter (TFF) technology and is supplied in a 19-inch 1U rackmount format. A 1% monitor port is provided for network link monitoring or optical power analysis, allowing troubleshooting and signal checking without interrupting normal traffic.

The product is developed and supplied by Infinol Technology (shenzhen) Co., Ltd., with customized CWDM channel counts, wavelength ranges, and rack configurations available for specific network requirements.

Key Product Features

1. 18-Channel CWDM Multiplexing

The system supports 18 CWDM channels across the 1270–1610 nm wavelength range. Multiple optical services can be multiplexed onto the same fiber pair, helping network operators make better use of available fiber infrastructure.

2. Dual-Fiber Point-to-Point Transmission

The device is designed for transmission over two optical fibers. One fiber can be used for the corresponding transmission path and the other for the return path, making it suitable for point-to-point network architectures.

3. Passive Optical Design

The CWDM MUX/DEMUX is a passive optical device and does not require protocol-specific processing. This enables protocol-transparent transmission for compatible optical services.

It can support network applications involving Ethernet, Fiber Channel, OTN, SONET/SDH, and other compatible services.

4. 1% Monitor Port

A dedicated 1% monitor port allows network operators to monitor optical signals or check optical power without directly interrupting the main traffic path.

This feature can simplify network troubleshooting, link diagnosis, and routine optical signal analysis.

5. TFF Technology

The device uses Thin Film Filter (TFF) technology for wavelength multiplexing and demultiplexing. The design provides controlled wavelength separation and supports stable multi-channel optical transmission.

6. 20 nm Channel Spacing

The 18 CWDM channels use 20 nm spacing, providing a defined wavelength plan across the 1270–1610 nm range.

The channel passband is specified at ±6.5 nm around the corresponding center wavelength.

7. High Channel Isolation

The specified channel isolation is ≥30 dB for adjacent channels and ≥45 dB for non-adjacent channels. This helps reduce unwanted optical interference between wavelength channels.

8. Low Polarization Effects

The specified polarization mode dispersion is ≤0.1 ps, while polarization dependent loss is ≤0.3 dB.

These characteristics support stable optical transmission for compatible network applications.

9. Rackmount Installation

The standard product is housed in a 19-inch 1U rackmount enclosure with dimensions of 44 × 440 × 230 mm. This format is suitable for centralized installation in optical network racks and equipment cabinets.

10. Customized CWDM Configurations

In addition to the standard 18-channel model, customized channel counts and wavelength ranges are available. Buyers can specify the required wavelength plan, channel number, connector type, monitor port configuration, and rackmount requirements.

Technical Specifications

Specified optical performance is based on the product configuration with connectors. Customized configurations may have different optical parameters.

Wavelength and Channel Configuration

The standard device provides 18 CWDM channels from 1270 nm to 1610 nm with 20 nm channel spacing.

Each wavelength channel can carry a compatible optical service. This architecture allows multiple services to share a fiber pair without requiring a separate fiber for every service.

The wavelength plan can be selected according to the optical modules and transmission equipment used in the network. Customers should ensure that the CWDM optical transceivers match the selected wavelength channels.

Supported Optical Services

The Dual Fiber 18CH CWDM MUX / DEMUX is designed to be protocol transparent and can support compatible optical services such as:

• 1G Ethernet

• 10G Ethernet

• 25G CWDM optical applications

• SDH

• SONET

• Fiber Channel

• OTN

• Other compatible optical services

The actual service compatibility depends on the optical transceiver, wavelength, transmission distance, and network equipment.

Monitor Port for Network Troubleshooting

The integrated 1% monitor port provides a convenient interface for optical signal monitoring and power analysis.

Network engineers can use the monitor port to check optical signal conditions, assist with troubleshooting, and perform link analysis without directly disconnecting the primary optical transmission path.

This makes the monitor port useful for network maintenance, commissioning, and fault diagnosis.

Optical Performance

The device provides defined optical specifications for multi-channel transmission.

Insertion Loss

The regular insertion loss is specified at ≤5.4 dB. A configuration with 8 Skip 0 is specified at ≤3.0 dB.

Link Loss

Regular link loss is specified at ≤6.2 dB, while the 8 Skip 0 configuration is specified at ≤4.0 dB.

Return Loss

Return loss is specified at ≥45 dB.

Directivity

Directivity is specified at ≥45 dB.

Channel Isolation

Adjacent channel isolation is ≥30 dB, while non-adjacent channel isolation reaches ≥45 dB.

Polarization Performance

Polarization mode dispersion is ≤0.1 ps and polarization dependent loss is ≤0.3 dB.

These specifications should be considered together with the complete optical link budget when designing a network.

Rackmount Design

The standard Dual Fiber 18CH CWDM MUX / DEMUX uses a 19-inch 1U rackmount enclosure.

The dimensions are 44 × 440 × 230 mm, with a net weight of approximately 1.5 kg.

The rackmount format is suitable for installation in:

• Data center racks

• Telecom equipment cabinets

• Optical distribution systems

• Network operation centers

• Transmission equipment rooms

• CWDM network nodes

The rack design allows the device to be installed alongside other optical transmission equipment.

Application Scenarios

The CWDM MUX/DEMUX can be used in optical networks where fiber resources are limited and multiple services need to share the same fiber infrastructure.

Typical applications include:

• Metropolitan area networks

• Regional CWDM networks

• Data centers

• Internet Data Centers (IDC)

• Broadcast and television networks

• Financial networks

• Government networks

• Cloud infrastructure

• Large-scale data transmission networks

• Telecom transmission networks

• Fiber access networks

The product is particularly suitable for point-to-point transmission over a dual-fiber infrastructure.

Fiber Resource Optimization

When a network has limited optical fiber resources, deploying separate fibers for each service can increase infrastructure requirements. CWDM provides a wavelength-based approach in which multiple optical services can share a fiber pair.

The 18-channel architecture allows multiple services to be transmitted simultaneously over the same two fibers, helping optimize existing fiber infrastructure.

Actual network capacity depends on the number of active wavelengths, optical modules, transmission rates, link distance, and available optical power budget.

Compatibility with CWDM Optics

The product is designed to work with compatible CWDM optical transceivers. The supplied information states compatibility with ITU-T 1G, 10G, and 25G CWDM optics.

When selecting optical modules, buyers should match the module's center wavelength with the corresponding CWDM channel of the MUX/DEMUX.

Other parameters, including transmission distance, connector type, optical power, and receiver sensitivity, should also be checked before deployment.

Product Configuration

The standard product configuration is:

Product No.: CWMMD18-1U01-2761M

Description: CWDM MUX/DEMUX, 18CH, 1270–1610 nm, with monitor port, dual fiber, LC/UPC, 19-inch 1U rackmount.

A customized configuration is also available:

Product No.: CWDMDXX-1U01-XXXX

Description: CWDM MUX/DEMUX with customized channel count and wavelength range, monitor port, dual fiber, LC/UPC, 19-inch 1U rackmount.

The exact wavelength range and channel count should be confirmed before ordering.

Customization and OEM/ODM Support

Infinol Technology (shenzhen) Co., Ltd. provides OEM and ODM services for active and passive optical communication products.

For customized CWDM MUX/DEMUX projects, customers can discuss requirements including:

• Channel count

• Wavelength range

• Center wavelengths

• Channel spacing

• Mux/Demux configuration

• Monitor port

• Fiber configuration

• Connector type

• Rackmount format

• Optical performance

• Network application

Customized design is available for projects that require a wavelength plan or mechanical configuration different from the standard product.

Company Profile

Infinol Technology (shenzhen) Co., Ltd. specializes in the R&D, production, and sales of optical communication products. The company provides optical fiber products and network solutions for data communication, optical storage, telecommunications, and related applications.

Its product portfolio includes CSFP, SFP, BIDI, SFP+, CWDM, DWDM, XFP, SFP28, QSFP+, CFP, CFP2, CFP4, SFP56, QSFP28, QSFP56, QSFP-DD, OSFP, SFP112, and QSFP112 optical transceiver modules.

The company also supplies high-speed DAC and AOC cables for storage, data, and high-performance computing interconnections, along with MPO and MTP high-density trunk cables for data center applications.

Optical Communication Product Portfolio

The company's optical communication products cover transmission speeds ranging from 155M to 25G, 100G, 200G, 400G, and 800G applications.

Product categories include:

• Optical transceiver modules

• CWDM and DWDM products

• DAC and AOC cables

• MPO and MTP trunk cables

• Active optical communication products

• Passive optical communication products

Products are intended for compatible Ethernet, Fiber Channel, InfiniBand, SONET, SDH, OTN, CPRI, and PON applications.

B2B Purchasing Guide

Before ordering an 18-channel CWDM MUX/DEMUX, buyers should confirm:

1. Required channel count

2. Wavelength range

3. Center wavelength plan

4. Transmission rate

5. Fiber count

6. Point-to-point network architecture

7. Mux/Demux configuration

8. Monitor port requirements

9. Connector type

10. Rackmount requirements

11. Optical link budget

12. Transmission distance

13. Compatible CWDM optical modules

14. Operating temperature

15. Customized wavelength requirements

Providing the planned network topology and optical module specifications can help determine the appropriate CWDM configuration.

FAQ

What is the main function of this CWDM MUX/DEMUX?

It combines and separates multiple optical wavelengths so that up to 18 compatible services can share a dual-fiber transmission link.

How many channels does the standard model support?

The standard model supports 18 CWDM channels.

What is the wavelength range?

The standard wavelength range is 1270–1610 nm with 20 nm channel spacing.

Does it use one fiber or two fibers?

This product is designed for dual-fiber transmission and point-to-point applications.

Does it have a monitor port?

Yes. A 1% monitor port is provided for optical signal analysis, power monitoring, and troubleshooting.

Is the product passive?

Yes. It is a passive CWDM optical device and is designed to provide protocol-transparent wavelength multiplexing and demultiplexing.

What optical technology does it use?

The device uses TFF, or Thin Film Filter, technology.

What are the standard dimensions?

The rackmount version measures 44 × 440 × 230 mm and occupies 1U in a standard 19-inch rack.

What connector is used?

The listed standard configuration uses LC/UPC connectors. Other configurations can be discussed for customized requirements.

Can the product be customized?

Yes. Customized channel counts, wavelength ranges, and other configurations are supported.

What applications are suitable for this product?

It can be used in metro and regional CWDM networks, IDC, data centers, telecommunications, broadcast and TV, finance, government, cloud, and other data transmission environments.

Product Summary

The Dual Fiber 18CH CWDM MUX / DEMUX provides 18-channel wavelength multiplexing over a dual-fiber link, with 1270–1610 nm coverage, 1% monitor port, TFF technology, high isolation, and 19-inch 1U rackmount deployment.