1260–1360nm Pass / 1460–1620nm Reflect FWDM

Product Overview

The 1260–1360nm Pass / 1460–1620nm Reflect FWDM is a compact passive Filter Wavelength Division Multiplexer designed to separate or combine two broad optical wavelength bands within a single fiber system.

Key Features

• Wide Transmission Band
  Passes optical signals from 1260 to 1360 nm.

• Wide Reflection Band
  Reflects optical signals from 1460 to 1620 nm.

• Low Transmission Insertion Loss
  Transmission-band insertion loss: ≤0.6 dB.

• Low Reflection Insertion Loss
  Reflection-band insertion loss: ≤0.4 dB.

• High Optical Isolation
  Transmission isolation ≥30 dB and reflection isolation ≥15 dB.

• Low Polarization Sensitivity
  Polarization Dependent Loss (PDL) ≤0.1 dB.

• Low Polarization Mode Dispersion
  PMD ≤0.1 ps.

• High Return Loss and Directivity
  Return loss ≥50 dB and directivity ≥50 dB.

• 500 mW Power Handling
  Supports a maximum specified optical power of 500 mW.

• Compact Cylindrical Package
  Ø5.5 × 34 mm housing, including the steel cap.

• G657A1 Fiber
  Uses Corning G657A1 bend-insensitive single-mode fiber with 900 μm loose-tube protection.

Applications

• PON and FTTx optical networks
• O-band / longer-wavelength band separation
• 1310nm and 1490/1550nm-region wavelength separation
• Optical network monitoring
• CATV and data signal coexistence
• Fiber communication systems
• Optical test and measurement
• Wavelength-selective optical modules
• Custom WDM assemblies
• Passive optical network equipment

FAQ

Q1: What is an FWDM?

FWDM stands for Filter Wavelength Division Multiplexer. It uses wavelength-selective filtering to transmit one optical wavelength band while reflecting another band.

Q2: What wavelengths does this FWDM transmit?

The specified transmission band is:

1260–1360 nm

Q3: What wavelengths does it reflect?

The specified reflection band is:

1460–1620 nm

Q4: Can this FWDM separate 1310nm and 1550nm signals?

Yes. 1310 nm lies within the 1260–1360 nm transmission band, while 1550 nm lies within the 1460–1620 nm reflection band.

Q5: Can it be used with 1490nm or 1577nm signals?

Both 1490 nm and 1577 nm fall within the specified 1460–1620 nm reflection band. Final system compatibility should also consider the complete optical power budget and system architecture.

Q6: Does the FWDM require electrical power?

No. It is a passive optical component and does not require an external electrical power supply.

Q7: What fiber is used?

The product uses Corning G657A1 single-mode fiber with 900 μm loose-tube protection.

Q8: Does the standard configuration include connectors?

No. The current specification is supplied without connectors, allowing direct fusion splicing or integration into another optical assembly.

Q9: What is the maximum optical power?

The specified maximum optical power is 500 mW.

Q10: What are the operating and storage temperatures?

The specified operating temperature range is −5°C to +70°C, while the storage temperature range is −40°C to +85°C.

Technical Specifications

Configuration & Customization Options

The current configuration uses Corning G657A1 fiber, 900 μm loose tube, no optical connectors, and a Ø5.5 × 34 mm cylindrical package.

Depending on project requirements, fiber length, connector termination, loose-tube configuration, wavelength band design, and package format can be evaluated for customization.

Detailed Product Description

The 1260–1360nm Pass / 1460–1620nm Reflect FWDM is designed for wavelength-selective routing between two broad optical bands.

Optical signals within the 1260–1360nm pass band are transmitted through the filter with a specified insertion loss of ≤0.6 dB. Signals within the 1460–1620nm reflection band are routed to the reflection port with insertion loss specified at ≤0.4 dB.

The device provides transmission isolation of at least 30 dB and reflection isolation of at least 15 dB, helping suppress unwanted optical power between the two wavelength paths. Polarization-related performance is controlled with PDL ≤0.1 dB and PMD ≤0.1 ps.

For compact optical integration, the device uses a cylindrical Ø5.5 × 34 mm package with Corning G657A1 fiber and 900 μm loose-tube protection. The standard configuration is connectorless and can therefore be fusion-spliced directly into optical modules, monitoring systems, or customized passive optical assemblies.

Application Scenario

PON Wavelength Separation

The FWDM can separate shorter O-band wavelengths around 1310 nm from longer-wavelength optical signals in the 1460–1620 nm region, making it suitable for passive optical network architectures requiring wavelength separation.

Optical Monitoring

The broad reflected wavelength range can be used in systems where longer-wavelength monitoring or service signals need to be separated from the O-band transmission path.

Integrated Passive Optical Module

Its compact Ø5.5 × 34 mm package and connectorless fiber configuration make the FWDM suitable for integration into PLC/WDM hybrid modules, optical monitoring assemblies, and other customized passive devices.

Why GracyFiber

GracyFiber supports customized FWDM and hybrid passive optical assemblies based on wavelength band, insertion loss, isolation, fiber type, fiber length, connector configuration, loose-tube protection, and mechanical package requirements.