1. Product Title

Optical WDM Filter – Red/Blue Band & 1310/1550 nm Fiber Filter

2. Product Overview

GracyFiber Optical Fiber WDM Filter is a thin-film wavelength-management component designed to separate or combine different optical bands over a single fiber. The product family supports 1310 nm, 1550 nm, and C-band Red/Blue wavelength configurations, with the supplied product description specifying a nominal operating wavelength range of 1260–1620 nm.

3. Key Features

• Thin-film WDM filter architecture
• Red / Blue C-band wavelength separation
• 1310 nm / 1550 nm wavelength-management configurations
• Pass-path insertion loss ≤0.6 dB
• Reflection-path insertion loss ≤0.4 dB
• Transmission isolation ≥30 dB
• Reflection isolation ≥15 dB
• Multiple fiber and package configurations
• Operating temperature: -5°C to +65°C

The supplied documentation specifically identifies ultra-low insertion loss, high channel isolation, support for 1310 nm, 1550 nm and Red/Blue bands, and an industrial operating temperature range.

4. Applications

• 1310 / 1550 nm Service Coexistence
• Optical Monitoring & Protection Paths
• C-Band Red / Blue Band Separation
• Hybrid PON Wavelength Management
• Access Networks
• FTTx Systems
• Metro Optical Networks
• Optical Test Platforms

These applications are explicitly identified in the supplied product documentation.

5. Technical Specifications

General Specifications

Pass / Reflect Band Configurations

Additional Optical Parameters

The supplied spreadsheet lists the following values once rather than separately for all four wavelength configurations:

Applicability of these three values to all configurations requires confirmation.

Connector

The spreadsheet lists:

LC/UPC or Customized

However, the connector cell appears associated with the Red/Blue configurations in the supplied table. Applicability to the 1550/980 and 1310/850 versions requires confirmation.

6. Configuration & Customization Options

Red / Blue Configuration

Available optical routing:

• Red Pass / Blue Reflect
• Blue Pass / Red Reflect

Red band:

1547.4–1561 nm

Blue band:

1530–1543.2 nm

1550 / 980 Configuration

• Pass: 1528–1565 nm
• Reflect: 965–995 nm

1310 / 850 Configuration

• Pass: 1260–1360 nm
• Reflect: 800–900 nm

Fiber Coating

• 250 μm
• 900 μm loose tube

Fiber Length

• 1000 mm

Connector

• LC/UPC
• Customized

Package Options

Listed package dimensions include:

• Ø5.5 * L38 mm
• 90 * 20 * 10 mm
• 120 * 80 * 18 mm
• 155 * 129 * 29 mm
• 482 * 250 * 44 mm

7. Detailed Product Description

The GracyFiber Optical Fiber WDM Filter provides wavelength-selective routing between two optical paths. Depending on the selected configuration, one wavelength band is transmitted through the pass port while another band is reflected to a separate optical path.

For C-band applications, the product supports dedicated Red and Blue wavelength regions. The Red-pass version transmits wavelengths from 1547.4 to 1561 nm while reflecting the 1530 to 1543.2 nm Blue band. The inverse configuration is also available, allowing the Blue band to pass while the Red band is reflected.

Additional configurations provide separation between significantly different wavelength bands. The 1550/980 version passes 1528–1565 nm and reflects 965–995 nm, while the 1310/850 version passes 1260–1360 nm and reflects 800–900 nm.

Across the listed configurations, maximum pass-path insertion loss is 0.6 dB, while maximum reflected-path insertion loss is 0.4 dB. Transmission isolation is specified at ≥30 dB and reflection isolation at ≥15 dB.

These wavelength-selective characteristics allow the component to combine or separate services operating in different spectral regions without requiring separate fiber infrastructure. The supplied product description positions the filter for multi-service routing, access networks, optical monitoring, and Red/Blue C-band separation.

8. Application Scenario

Application 1 — C-Band Red / Blue Separation

In C-band optical systems, the filter can separate the defined Red and Blue spectral regions into different optical paths.

The Red-pass/Blue-reflect or Blue-pass/Red-reflect configuration allows the routing direction to be selected according to the system architecture. Red/Blue band separation is explicitly identified in the supplied application information.

Application 2 — 1310 / 1550 nm Service Coexistence

Different optical services may operate around the 1310 nm and 1550 nm wavelength regions while sharing common fiber infrastructure.

The WDM filter provides wavelength-selective routing for such multi-band optical systems, and 1310/1550 nm service coexistence is specifically listed as an application.

Application 3 — Optical Monitoring and Protection

A wavelength filter can route selected wavelength regions toward monitoring or protection paths while allowing the primary optical band to continue through the main path.

The supplied documentation explicitly lists Optical Monitoring and Protection Paths as an application.

9. FAQ

What is an optical WDM filter?

An optical WDM filter is a wavelength-selective component that separates or combines optical bands according to wavelength. GracyFiber’s product uses thin-film wavelength filtering for multi-band routing over a single fiber.

What are the Red and Blue wavelength bands?

According to the supplied specification:

• Blue Band: 1530–1543.2 nm
• Red Band: 1547.4–1561 nm

The device can be configured as either Red Pass / Blue Reflect or Blue Pass / Red Reflect.

What is the insertion loss of the WDM filter?

The supplied specification lists:

• Pass-path IL: ≤0.6 dB
• Reflection-path IL: ≤0.4 dB

These values are listed for all four pass/reflect configurations in the supplied parameter table.

Are 980 nm and 850 nm versions available?

The specification includes:

• 1550 Pass / 980 Reflect: 1528–1565 nm / 965–995 nm
• 1310 Pass / 850 Reflect: 1260–1360 nm / 800–900 nm

However, these bands create a conflict with the separately listed 1260–1620 nm operating-wavelength range, so the exact definition should be confirmed before publication.

Can the optical filter be customized?

The supplied parameter sheet lists customized connector options and multiple fiber/package configurations.

For other wavelength bands, fiber lengths, connector types, or package requirements, please contact GracyFiber with the required specification.

10. Why GracyFiber

GracyFiber provides passive optical wavelength-management and fiber-optic components for telecom, access networks, photonics, sensing, and optical test systems.

Related product capabilities include:

• WDM Filters
• CWDM / CCWDM
• DWDM
• O-Band WDM
• MWDM / LWDM
• AAWG
• OADM
• PM WDM Components
• Fiber optic assemblies

For wavelength-filter projects, customers can provide the pass band, reflect band, fiber type, connector, package, and required optical specifications for technical evaluation.

11. Related Products

12. Call to Action

For an Optical WDM Filter quotation or technical evaluation, please provide:

• Required pass band
• Required reflect band
• Operating wavelength
• Fiber type
• Fiber coating
• Fiber length
• Connector
• Package dimensions
• Required insertion loss
• Required isolation
• Power level
• Application

GracyFiber can review the required wavelength-routing configuration according to your optical system.