1. Product Title

Reflective WDM High Isolation 1310/1550 nm Filter

2. Product Overview

GracyFiber Reflective WDM (High Isolation) is a compact bidirectional wavelength filter designed to separate 1310 nm and 1550 nm optical signals within a single-fiber system. Two wavelength-routing configurations are available: 1310 nm Pass / 1550 nm Reflect and 1550 nm Pass / 1310 nm Reflect.

The device operates across 1260–1620 nm and provides transmission isolation of ≥50 dB, together with low insertion loss, low PDL, and a compact Φ3.0 × 15 mm package.

Its miniature passive design is intended for space-constrained optical assemblies including GPON, XG-PON, XGS-PON transceivers, BiDi modules, BOSA assemblies, OLT/ONU equipment, and optical monitoring systems.

3. Key Features

• 1310 nm / 1550 nm wavelength separation
• Bidirectional Pass / Reflect configurations
• Transmission isolation ≥50 dB
• Pass-path insertion loss ≤1.1 dB
• Reflect-path insertion loss ≤0.7 dB
• Low PDL: ≤0.1 dB
• Compact Φ3.0 × 15 mm package
• 1260–1620 nm overall operating wavelength range
• LC/UPC receptacle & ferrule interface
• Designed for passive single-fiber wavelength routing

The supplied documentation specifically identifies low insertion loss, high isolation, low PDL, compact design, and 1260–1620 nm operating coverage as product characteristics.

4. Applications

• GPON Optical Transceivers
• XG-PON Optical Transceivers
• XGS-PON Optical Transceivers
• BiDi Single-Fiber Modules
• BOSA Optical Subassemblies
• Optical Line Terminal (OLT)
• Optical Network Unit (ONU)
• Optical Monitoring & Sensing

These applications are explicitly listed in the supplied product documentation.

5. FAQ

What is a Reflective WDM?

A Reflective WDM is a wavelength-selective passive optical component that transmits one wavelength band while reflecting another wavelength band into a different optical path.

This GracyFiber model is designed for 1310 nm / 1550 nm wavelength separation in single-fiber optical systems.

What wavelength configurations are available?

Two configurations are listed:

Configuration A

• Pass: 1310 nm, 1260–1337 nm
• Reflect: 1550 nm, 1503–1577 nm

Configuration B

• Pass: 1550 nm, 1503–1577 nm
• Reflect: 1310 nm, 1260–1337 nm

What is the isolation of the Reflective WDM?

The supplied specification lists:

• Transmission Isolation: ≥50 dB
• Reflection Isolation: ≥15 dB

The high transmission isolation is also highlighted in the product description.

What is the insertion loss?

The listed maximum insertion losses are:

• Pass Path: ≤1.1 dB
• Reflect Path: ≤0.7 dB

These specifications apply to both wavelength-routing configurations in the supplied parameter table.

Where is this Reflective WDM typically used?

The supplied documentation identifies applications including GPON/XG-PON/XGS-PON transceivers, BiDi modules, BOSA optical subassemblies, OLTs, ONUs, and optical monitoring systems.

6. Technical Specifications

Optical Specifications

General Specifications

*These parameters appear once in the supplied spreadsheet rather than being separately repeated for both wavelength directions. Applicability to both configurations should be confirmed before final publication.

7. Configuration & Customization Options

Wavelength Routing

Available:

1310 Pass / 1550 Reflect

• Pass band: 1260–1337 nm
• Reflect band: 1503–1577 nm

1550 Pass / 1310 Reflect

• Pass band: 1503–1577 nm
• Reflect band: 1260–1337 nm

Fiber Type

Listed:

• G67A1 / A2 / B3
• SMF-28

Exact fiber designations: [Need confirmation]

Fiber Coating

• 250 μm
• 600 μm loose tube

Connector / Optical Interface

Listed:

• LC/UPC Receptacle
• LC/UPC Ferrule

Package

• Φ3.0 × 15 mm

The compact package is also explicitly highlighted in the product description.

8. Detailed Product Description

The GracyFiber Reflective WDM (High Isolation) is designed for optical systems in which 1310 nm and 1550 nm wavelength regions need to coexist over a common single fiber while being separated at the optical module or subsystem level.

Its wavelength-selective structure provides two routing options. In one configuration, the 1260–1337 nm band passes through the device while the 1503–1577 nm band is reflected. The inverse version passes the 1550 nm region while reflecting the 1310 nm region.

The device provides maximum insertion loss of 1.1 dB on the pass path and 0.7 dB on the reflection path. Transmission isolation is specified at ≥50 dB, helping suppress the unwanted wavelength band at the transmission port, while reflection isolation is specified at ≥15 dB.

A key feature is its compact Φ3.0 × 15 mm mechanical format. This makes the component relevant to small optical assemblies where conventional module-format WDM devices may occupy too much space.

The supplied configuration also includes LC/UPC receptacle and ferrule interfaces, short fiber routing, and operating temperatures from -20°C to +70°C.

Because the component is passive, it can perform wavelength routing without active switching or electrical power. The supplied documentation positions it particularly for PON transceivers, BiDi modules, BOSA optical assemblies, OLT/ONU equipment, and monitoring systems.

9. Application Scenario

Application 1 — PON Optical Transceiver

In GPON, XG-PON, or XGS-PON optical modules, different wavelength regions may share a single external fiber interface.

The Reflective WDM provides wavelength-selective routing between the 1310 nm and 1550 nm regions inside the optical assembly. Its compact package is particularly relevant where internal module space is limited.

The supplied documentation explicitly identifies GPON / XG-PON / XGS-PON optical transceivers as target applications.

Application 2 — BOSA Optical Subassembly

In a BOSA architecture, transmit and receive optical paths may need to be separated while using a common external fiber interface.

The Reflective WDM can provide this wavelength-routing function through its pass and reflection paths. BOSA optical subassemblies are explicitly included in the supplied application list.

Application 3 — OLT / ONU Equipment

In access-network equipment, 1310 nm and 1550 nm wavelength regions may need to be separated or combined within a compact optical interface.

The device provides passive wavelength separation and is explicitly listed for both OLT and ONU applications.

10. Why GracyFiber

GracyFiber provides passive wavelength-management and fiber-optic components for access networks, optical communication, photonics, and optical interconnection.

Relevant GracyFiber product capabilities include:

• Reflective WDM
• CWDM / CCWDM
• DWDM
• O-Band WDM
• Optical Red / Blue Filters
• OADM
• WDM-PON Components
• PM WDM Components
• Fiber optic assemblies

For Reflective WDM projects, customers can provide the required pass/reflect wavelength direction, fiber type, optical interface, package, and target performance for technical evaluation.

11. Related Products

12. Call to Action

For a Reflective WDM (High Isolation) quotation or technical evaluation, please provide:

• Required pass wavelength
• Required reflect wavelength
• Fiber type
• Fiber coating
• Fiber length
• Connector / receptacle requirement
• Target insertion loss
• Required isolation
• Optical power
• Package requirement
• Application, such as BOSA, PON transceiver, OLT, or ONU

GracyFiber can review the wavelength-routing and mechanical configuration according to your optical assembly requirements.