Single-Mode FWDM Multiplexer – 1310/1550 nm for GPON/XGS-PON & CATV

Single-Mode FWDM Multiplexer – 1310/1550 nm for GPON/XGS-PON & CATV

GracyFiber FWDM Multiplexer is a single-mode wavelength filtering device designed for GPON/XGS-PON and CATV FTTH networks. It separates optical signals in different wavelength bands, including the commonly used 1310 nm data path and 1550 nm video path, enabling multiple optical services to share fiber infrastructure.

• Single-mode FWDM wavelength filtering
• Designed for GPON / XGS-PON + CATV FTTH
• Separates 1310 nm data and 1550 nm video signals
• Overall operating wavelength range: 1260–1620 nm
• Low insertion loss
• Low polarization-dependent loss (PDL)
• High optical isolation
• Compact design
• Operating temperature: -20°C to +75°C according to the product description
• Flexible packaging options

The supplied product information specifically identifies compact construction, low insertion loss and PDL, high isolation, wide wavelength coverage, and a -20°C to +75°C operating-temperature range.

• GPON / XGS-PON ONU Modules
• CATV Optical Nodes
• FTTH Optical Networks
• BiDi Bidirectional Single-Fiber Systems
• PON + CATV Wavelength Separation

The first three application areas and BiDi systems are explicitly supported by the supplied product documentation.

An FWDM, or Filter Wavelength Division Multiplexer, separates or combines optical signals according to wavelength bands. In the documented GPON/XGS-PON + CATV application, the device separates the 1310 nm data signal from the 1550 nm video signal.

The product description specifies an overall operating wavelength range of 1260 nm to 1620 nm. Individual pass and reflection bands depend on the selected FWDM configuration.

The supplied spreadsheet contains several different pass-band and reflection-band combinations, indicating multiple filter configurations. Whether wavelengths outside the listed configurations can be customized is [Need confirmation].

The supplied specification lists:

• G67A1
• A2
• B3
• SMF-28

The designation G67A1 should be confirmed before publication, as noted in the Information to Confirm section.

The supplied spreadsheet lists LC/UPC or customized connector configurations.

The supplied FWDM spreadsheet lists the following wavelength combinations:

Important: The product description separately states 45 dB isolation and ≤0.3 dB insertion loss for the GPON/XGS-PON + CATV product.
This conflicts with the XLSX specification values above, so the website should not publish a single guaranteed IL/isolation figure until the correct specification is confirmed.

Documented options include:

• 1310 ±50 nm Pass / 1550 ±80 nm Reflect
• 1550 ±80 nm Pass / 1310 ±50 nm Reflect
• 1400–1572 nm Pass / 1575–1680 nm Reflect
• 1530–1565 nm Pass / 1260–1500 & 1575–1660 nm Reflect
• 1260–1620 nm Pass / 1640–1670 nm Reflect
• 1600–1670 nm Pass / 1260–1590 nm Reflect

Documented options:

• G67A1
• A2
• B3
• SMF-28

• 250 µm fiber
• 900 µm loose tube

• Standard documented length: 1000 mm

• LC/UPC
• Customized connector

Documented dimensions:

• 90 × 20 × 10 mm
• 120 × 80 × 18 mm
• 155 × 129 × 29 mm
• 482 × 250 × 44 mm

The product description also confirms flexible packaging options.

The GracyFiber FWDM Multiplexer is a passive optical filtering component designed to separate or combine optical signals according to wavelength bands. Its primary documented application is GPON/XGS-PON + CATV FTTH, where data and video services may operate on different wavelengths while sharing fiber infrastructure.

For the standard PON/CATV application described in the product documentation, the FWDM separates the 1310 nm data signal and 1550 nm video signal.

The broader FWDM product family includes several pass-band and reflection-band arrangements. These configurations allow different optical wavelength regions to be transmitted through one port while another wavelength region is reflected to a separate optical path. The supplied specification includes configurations around 1310 nm, 1550 nm, the 1400–1680 nm region, and wider 1260–1670 nm filtering schemes.

Optical performance parameters documented in the spreadsheet include insertion loss, transmission and reflection isolation, ripple, PDL, return loss, and directivity. Because the numerical insertion-loss and isolation values in the spreadsheet differ from those stated in the accompanying product description, the final guaranteed limits should be confirmed before publication.

The FWDM is available with multiple fiber, connector, and housing configurations. The specification lists both compact packages and a 482 × 250 × 44 mm format, providing options for component-level and larger system integration.

This makes the product suitable for PON/CATV coexistence, ONU modules, CATV nodes, and bidirectional single-fiber optical architectures requiring wavelength-selective routing.

In an FTTH network carrying both data and CATV optical signals, different wavelength bands need to be separated or combined without requiring separate fiber infrastructure.

The documented FWDM configuration separates the 1310 nm data path from the 1550 nm CATV video path, allowing the two optical services to be managed independently within the network.

The supplied documentation specifically lists GPON/XGS-PON ONU modules as an application.

In this architecture, the FWDM provides wavelength-selective routing within the optical interface so that signals occupying different wavelength bands can be directed to the corresponding optical paths.

BiDi systems carry optical signals in different wavelength bands over the same fiber.

An FWDM can separate those wavelength regions at the equipment interface, enabling wavelength-specific optical paths while maintaining the single-fiber connection.

GracyFiber provides passive wavelength-management and optical interconnect components for telecom, access, data center, and photonics applications.

Relevant product capabilities include:

• FWDM
• CWDM
• DWDM
• MWDM
• LWDM
• AAWG
• WDM-PON Components
• PM WDM Components
• PLC Splitters
• FBT Couplers
• Fiber Arrays and FAUs
• MPO/MTP Optical Interconnects

For this FWDM family, the supplied product specifications include multiple wavelength-filter configurations, fiber options, packaging formats, and customized connector capability.

Need an FWDM for GPON/XGS-PON, CATV, or another wavelength-filtering application?

Send GracyFiber your required:

• Pass-band wavelength
• Reflection-band wavelength
• Target insertion loss
• Required isolation
• PDL requirement
• Fiber type
• Fiber coating
• Fiber length
• Connector type
• Package dimensions
• Optical power
• Application

GracyFiber can review the required FWDM filter configuration before quotation.