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Description

Single Mode Triplex Window Coupler – DK Photonics

The Single Mode Triplex Window Coupler from DK Photonics is a high-performance optical passive component designed to meet the demanding requirements of modern fiber optic communication networks. Utilizing advanced asymmetric coupling techniques, this coupler efficiently operates across three key communication windows—1310 nm, 1490 nm, and 1550 nm—making it an ideal solution for systems that require simultaneous multi-wavelength transmission. Its design ensures a consistent coupling ratio across all three wavelengths, providing reliable performance for a wide range of applications.

Engineered for versatility, the Triplex Window Coupler is widely used in long-haul telecommunications, CATV systems, fiber optic sensors, and local area networks. Its ability to handle multiple optical signals through a single fiber streamlines network architecture and enhances signal integrity. The coupler is available in various coupling ratios (from 1% to 50%), allowing for tailored solutions that match specific system requirements. Its compact form factor and low excess loss further contribute to its suitability for space-constrained installations and high-density network environments.

The product is manufactured to rigorous industry standards, being Telcordia GR-1221/1209-CORE qualified and RoHS compliant, ensuring long-term reliability and environmental safety. With low polarization dependent loss (PDL) and high directivity (>55 dB), the Triplex Window Coupler guarantees minimal signal degradation and optimal performance even in challenging operating conditions. Its robust construction supports a wide operating temperature range from -40°C to 85°C, making it suitable for deployment in diverse environments.

Compatible with leading fiber types such as Corning SMF-28, DS Fiber, and Flexcore, the coupler is offered in multiple port configurations (1x2 or 2x2) and package types to accommodate different installation needs. Each unit comes with a standard 1-meter fiber pigtail, and customization options are available for fiber diameter, length, and connector type. This flexibility, combined with its superior optical characteristics, positions the DK Photonics Single Mode Triplex Window Coupler as a reliable choice for network operators and system integrators seeking efficient, scalable, and future-proof optical solutions.

Singlemode Triplex Window Fiber Coupler 1310 1490 1550nm Low Loss

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Specifications

Type: Tree Coupler
Configuration: 1x2, 2x2
Splitting Ratio: 40/60, 30/70, 20/80, 10/90, 5/95, Other / Not specified
Wavelength: 1550 nm
Fiber Type: Single-mode (SM), SMF-28e
Connector Type: FC
Housing Material: Stainless Steel, Plastic, Aluminum, Polymer
Coupling Ratio (%): 1-50
Directivity (dB): >55 dB
Operating Temperature: -40°C to 85°C
Storage Temperature: -40°C to 85°C
Fiber Type: Corning Singlemode SMF-28, DS Fiber, or Flexcore
Fiber Pigtail Length (m): 1 meter
Port Configuration: 1x2 or 2x2
Excess Loss (Typical) (dB) - P Grade: 0.10
Excess Loss (Typical) (dB) - A Grade: 0.15
Maximum Insertion Loss (dB) - P Grade: 3.6
Maximum Insertion Loss (dB) - A Grade: 3.8
Uniformity (Max.) (dB) - P Grade: 0.7
Uniformity (Max.) (dB) - A Grade: 1.0
Polarization Sensitivity (dB) - P Grade: 0.10
Polarization Sensitivity (dB) - A Grade: 0.15
Operating Wavelength (nm): 1310/1550 ±40, 1490 ±10
Package Type A Dimensions: Ф3.0mm × 40mm
Package Type B Dimensions: Ф3.0mm × 54mm
Package Type C Dimensions: Ф3.0mm × 60mm
Package Type D Dimensions: 90mm × 20mm × 9.5mm
Fiber Diameter: 250μm bare fiber, 900μm loose tube, 2mm/3mm loose tube

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Features

  • Triple Window Operation: Supports 1310nm, 1490nm, and 1550nm communication windows for maximum compatibility with modern fiber optic systems.
  • Low Excess Loss: Typical excess loss as low as 0.10 dB (Premium grade), ensuring minimal signal degradation.
  • Wide Range of Coupling Ratios: Available in coupling ratios from 1/99 to 50/50, providing flexibility for diverse network requirements.
  • Low Polarization Dependent Loss (PDL): PDL as low as 0.10 dB, maintaining signal integrity across all wavelengths.
  • High Directivity: Greater than 55 dB directivity for superior signal isolation and reduced crosstalk.
  • Compact and Versatile Packaging: Multiple package types (bare fiber, loose tube, etc.) with compact dimensions for easy integration into various systems.
  • Multiple Port Configurations: Available in 1x2 and 2x2 port configurations to suit different network architectures.
  • Wide Operating Temperature Range: Reliable performance from -40°C to +85°C, suitable for harsh environments.
  • High-Quality Fiber Options: Compatible with Corning SMF-28, DS Fiber, or Flexcore for optimal transmission quality.
  • Telcordia GR-1221/1209-CORE Qualified: Meets stringent industry standards for reliability and performance.
  • RoHS Compliant: Environmentally friendly and free from hazardous substances.
  • Long Fiber Pigtail Length: Standard 1-meter fiber pigtails for convenient installation and splicing.
  • Low Insertion Loss: Maximum insertion loss as low as 3.6 dB (Premium grade) for efficient signal transfer.
  • Excellent Uniformity: Maximum uniformity of 0.7 dB (Premium grade) ensures consistent performance across all channels.
  • Customizable Options: Custom specifications, connector types, and fiber lengths available upon request.

Applications

  • Long-Haul Telecommunications
    Ideal for multiplexing and demultiplexing signals over extended distances in single-mode fiber optic networks, ensuring low loss and high reliability across 1310nm, 1490nm, and 1550nm windows.
  • CATV (Cable Television) Systems
    Used for distributing multiple optical signals in cable television networks, supporting high bandwidth and low insertion loss for superior signal quality.
  • Fiber Optic Sensors
    Enables precise signal splitting and combining in fiber optic sensor applications, including distributed sensing and monitoring in industrial, structural, and environmental systems.
  • FTTH (Fiber to the Home) Networks
    Essential for passive optical network (PON) architectures, allowing efficient signal distribution to multiple subscribers with minimal loss and high uniformity.
  • Local Area Networks (LAN)
    Facilitates signal routing and distribution in enterprise and campus LANs, supporting high-speed data transmission and network scalability.
  • Wavelength Division Multiplexing (WDM) Systems
    Supports multiplexing and demultiplexing of signals at 1310nm, 1490nm, and 1550nm, enabling increased bandwidth and efficient use of fiber infrastructure.
  • Test and Measurement Equipment
    Used in optical test benches and instrumentation for splitting and combining signals during equipment calibration, testing, and R&D.
  • Optical Signal Monitoring
    Allows for real-time monitoring of optical signals in transmission lines, ensuring network performance and facilitating fault detection.
  • Metro and Access Networks
    Suitable for signal distribution and routing in metropolitan and access network environments, supporting high-density and high-capacity deployments.
  • Military and Aerospace Communications
    Provides robust and reliable optical signal management in mission-critical communication systems, benefiting from wide operating temperature range and Telcordia/GR-1221/1209-CORE qualification.
  • Industrial Automation
    Used in industrial control and automation systems for reliable data transmission and sensor integration over optical fiber.
  • Medical Imaging and Diagnostics
    Enables precise optical signal routing in advanced medical imaging devices and diagnostic equipment.

Frequently Asked Questions

What is a Single Mode Triplex Window Coupler and what are its main applications?
A Single Mode Triplex Window Coupler is an optical passive component designed to split or combine optical signals across three key communication windows: 1310nm, 1490nm, and 1550nm. It is widely used in long-haul telecommunications, CATV systems, fiber sensors, and local area networks, especially where multiple optical signals need to be transmitted through a single fiber.
What are the key features and benefits of the DK Photonics Triplex Window Coupler?
The DK Photonics Triplex Window Coupler offers low excess loss, various coupling ratios (from 1% to 50%), compact size, and low polarization dependent loss (PDL). It maintains consistent coupling ratios across 1310nm, 1490nm, and 1550nm wavelengths, making it ideal for high-performance optical communication systems. The product is also Telcordia GR-1221/1209-CORE qualified and RoHS compliant.
What coupling ratios and port configurations are available for this coupler?
The coupler is available in a wide range of coupling ratios, including 50/50, 40/60, 30/70, 20/80, 10/90, 5/95, 3/97, 2/98, and 1/99, as well as custom ratios upon request. Port configurations include 1x2 and 2x2, allowing flexibility for different network designs.
What is the insertion loss and excess loss for the DK Photonics Triplex Window Coupler?
The typical excess loss is as low as 0.10 dB for Premium grade and 0.15 dB for A grade. The maximum insertion loss varies depending on the coupling ratio and grade, ranging from 0.2 dB to 21.5 dB. For example, a 50/50 coupler has a maximum insertion loss of 3.6 dB (Premium) or 3.8 dB (A grade).
What fiber types and package options are available for this product?
The coupler supports Corning Singlemode SMF-28, DS Fiber, or Flexcore fibers. Package options include bare fiber (250μm), 900μm loose tube, and 900μm/2mm/3mm loose tube, with package dimensions ranging from 3.0mm×40mm to 90mm×20mm×9.5mm. Fiber pigtail lengths are typically 1 meter, but custom lengths are available.
Is the DK Photonics Triplex Window Coupler compliant with industry standards?
Yes, the coupler is Telcordia GR-1221/1209-CORE qualified, ensuring high reliability and performance for telecom applications. It is also RoHS compliant, meeting environmental and safety standards.

Got more questions? Use the inquiry form to ask the supplier directly.

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