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Description

The 1310/1550nm SM Filter Coupler (1x2/2x2) from DK Photonics is a high-performance optical component designed for precise wavelength division and signal routing in fiber optic systems. Utilizing advanced micro-optic filter technology, this coupler achieves exceptionally low insertion loss and minimal excess loss, making it ideal for applications that demand high signal integrity and efficiency.

Its broad operating bandwidth ensures compatibility with a wide range of wavelengths, particularly at 1310nm and 1550nm, which are standard in telecommunications and sensing applications. Unlike traditional fused biconical taper (FBT) couplers, the DK Photonics filter coupler is specifically engineered for use with large-core double-clad fibers and multi-mode fibers, which cannot be processed using the FBT method. This makes it a versatile solution for modern fiber optic networks, fiber sensors, and research environments where specialty fibers are employed. The compact in-line package design allows for easy integration into space-constrained setups, while maintaining high stability and reliability even in demanding operational conditions. The filter coupler is extensively used in fiber optic instruments, coherent detection systems, and advanced research projects.

Its robust construction and customizable configurations—such as different coupling ratios, fiber lengths, and connector types—enable tailored solutions to meet specific project requirements. Whether deployed in laboratory research, industrial sensing, or telecommunications infrastructure, the DK Photonics 1310/1550nm SM Filter Coupler delivers consistent performance and long-term reliability, supporting the evolving needs of the photonics industry.

1550nm Polarization Maintaining Filter Coupler (1x2/2x2)

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Specifications

Type: Fused Biconical Taper (FBT)
Configuration: 1x2, 2x2
Wavelength: 1310 nm
Fiber Type: SMF-28e
Connector Type: FC
Housing Material: Stainless Steel, Plastic, Aluminum, Polymer
Operating Wavelength: 1310nm / 1550nm
Configuration: 1x2 / 2x2
Power Handling: <0.5W, 1W, 2W, 10W
Coupling Ratio: 50:50, 40:60, 30:70, 20:80, 10:90, 1:99
Pigtails Diameter: 250μm bare fiber, 900μm Loose Tube
Fiber Length: 0.8m, 1.0m, others
Connector: None, FC/PC, FC/APC, others

Got questions about specs? Use the inquiry form to ask.

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Features

  • Low Insertion Loss: Ensures minimal signal loss for high-performance optical networks.
  • Broad Operating Band: Supports both 1310nm and 1550nm wavelengths for versatile applications.
  • High Stability and Reliability: Advanced micro-optic filter technology delivers consistent and dependable operation.
  • Compact In-Line Package: Space-saving design ideal for integration into various fiber optic systems.
  • Multiple Configurations Available: Choose from 1x2 or 2x2 port configurations to suit your network requirements.
  • Customizable Coupling Ratios: Wide range of coupling ratios (50:50, 40:60, 30:70, 20:80, 10:90, 1:99, and more) for tailored performance.
  • Flexible Fiber and Connector Options: Compatible with 250μm bare fiber, 900μm loose tube, and various connector types (FC/PC, FC/APC, etc.).
  • High Power Handling Capability: Supports up to 10W with optional heat sink package for demanding applications.
  • Excellent Return Loss: Optimized for superior signal integrity and reduced back-reflection.
  • Wide Application Range: Ideal for fiber optic instruments, fiber sensors, coherent detection, and research applications.
  • Suitable for Large-Core and Multi-Mode Fibers: Perfect for fibers that cannot use the FBT process for fused couplers.
  • RoHS Compliant and Telcordia GR-1209/1221 Qualified: Meets international standards for quality and reliability (please confirm with DK Photonics for specific compliance).
  • Customizable to Your Needs: Options for pigtail length, fiber type, and special requirements available upon request.

Applications

  • Fiber Optic Communication Systems
    Efficiently splits or combines optical signals in single-mode fiber networks, supporting high-speed data transmission in telecom and datacom infrastructures.
  • Fiber Optic Sensors
    Used in distributed and point fiber optic sensing applications for environmental monitoring, structural health monitoring, and industrial process control.
  • Optical Coherent Detection
    Essential in coherent optical communication systems for signal mixing, splitting, and routing, enhancing sensitivity and performance.
  • Fiber Optic Test and Measurement Instruments
    Integrated into optical power meters, OTDRs, and other test equipment for accurate signal routing and measurement.
  • Wavelength Division Multiplexing (WDM) Systems
    Enables multiplexing and demultiplexing of different wavelength channels, increasing bandwidth and network flexibility.
  • Optical Amplifiers
    Used in EDFA and Raman amplifier setups for signal monitoring, power splitting, and feedback control.
  • Research and Development
    Ideal for laboratory experiments and prototyping in photonics, quantum optics, and fiber optic component development.
  • CATV (Cable Television) Networks
    Distributes optical signals in broadband CATV systems, ensuring reliable signal delivery to multiple endpoints.
  • Passive Optical Networks (PON)
    Facilitates signal distribution in FTTx (Fiber to the x) deployments, supporting high-capacity access networks.
  • Laser Systems
    Used for beam splitting and combining in fiber laser setups, including high-power and pulsed laser applications (with appropriate heat sink packaging).
  • Biomedical and Medical Imaging
    Supports optical coherence tomography (OCT) and other fiber-based imaging modalities for diagnostics and research.
  • Military and Aerospace Fiber Optic Systems
    Provides reliable signal routing and splitting in mission-critical communication and sensor networks.
  • Quantum Communication and Computing
    Used in quantum key distribution (QKD) and quantum optics experiments for precise photon routing and splitting.

Frequently Asked Questions

What is a 1310/1550nm SM Filter Coupler and what are its main applications?
A 1310/1550nm SM Filter Coupler is a fiber optic component designed to split or combine optical signals at 1310nm and 1550nm wavelengths in single-mode fibers. It uses advanced micro-optic filter technology to achieve low insertion loss, broad operating bandwidth, and high stability. Main applications include fiber optic instruments, fiber sensors, coherent detection systems, and research projects.
What are the key features of the DK Photonics Filter Coupler Series?
The DK Photonics Filter Coupler Series offers low insertion loss, a broad operating band, a compact in-line package, and high stability and reliability. These features make it suitable for demanding applications in fiber optic instrumentation, sensing, and coherent detection.
How does the DK Photonics Filter Coupler differ from FBT fused couplers?
Unlike FBT (Fused Biconical Taper) couplers, the DK Photonics Filter Coupler uses micro-optic filter technology, making it suitable for large-core double-clad fibers and multi-mode fibers, which cannot be processed using the FBT method. This results in lower excess loss and greater compatibility with a wider range of fiber types.
What configurations and coupling ratios are available for the DK Photonics Filter Coupler?
The Filter Coupler is available in 1x2 and 2x2 configurations, with a variety of coupling ratios including 50:50, 40:60, 30:70, 20:80, 10:90, 1:99, and custom options. This flexibility allows users to select the optimal split for their specific application.
What is the maximum power handling capability of the DK Photonics Filter Coupler?
Standard models handle up to 2W of optical power through connectors. For high-power applications exceeding 10W, DK Photonics offers heat sink packages. Customers should contact DK Photonics for custom solutions if higher power handling is required.
Can the DK Photonics Filter Coupler be customized for specific requirements?
Yes, DK Photonics offers extensive customization options for their filter couplers, including different port configurations, operating wavelengths, power handling capacities, coupling ratios, pigtail diameters, fiber lengths, and connector types. Customers are encouraged to provide detailed requirements when inquiring.
What should I consider when ordering a DK Photonics Filter Coupler with connectors?
When ordering with connectors, note that insertion loss will be 0.3dB higher and return loss will be 5dB lower compared to bare fiber versions. The maximum power through the connector is less than 2W. For pulse applications, inform DK Photonics of pulse energy and peak power to ensure optimal performance and safety.

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

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