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Description

Evanescence Based Variable Split Ratio Fiber Splitter/Coupler Overview

The Evanescence Based Variable Split Ratio Fiber Splitter/Coupler is a precision optical component engineered for dynamic control of optical power distribution in fiber optic systems. Unlike conventional fixed-ratio splitters, this device enables users to continuously adjust the splitting ratio from 0% to 100%, offering unparalleled flexibility for a wide range of photonics applications. This is achieved through an innovative design that utilizes two side-polished fibers positioned in close proximity, allowing for controlled evanescent field coupling. By fine-tuning the distance between the fiber cores, the coupling ratio can be precisely set to meet specific system requirements.

This variable fiber splitter/coupler is optimized for low insertion loss and high uniformity across a broad spectral range, supporting wavelengths from 400 nm up to 2000 nm. Its compact form factor makes it ideal for integration into space-constrained setups, while the high directivity ensures minimal signal leakage and optimal performance. The device is available in both single mode and polarization maintaining (PM) fiber configurations, with customizable birefringence axis alignment for PM models to support advanced polarization-sensitive applications.

Designed for versatility, the Evanescence Based Variable Split Ratio Fiber Splitter/Coupler is widely used in optical amplifiers, fiber lasers, power monitoring systems, fiber optic gyroscopes, and coherent communication networks. Its ability to provide real-time, lossless adjustment of the split ratio makes it an essential tool for laboratory research, system prototyping, and field deployment where adaptability and precision are paramount. The splitter is available with a variety of fiber types, connector options, and jacket diameters to suit diverse operational needs.

With its robust performance, broad wavelength compatibility, and customizable options, this variable fiber splitter/coupler stands out as a reliable solution for demanding optical applications. Whether for power balancing, signal routing, or system diagnostics, it delivers the flexibility and precision required by modern photonics professionals.

Evanescence-Based Variable Split Ratio Fiber Splitter Coupler VBS-22

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Specifications

Splitting Ratio: Other
Central Wavelength: 1550 nm
Power Handling: Not Specified
Insertion Loss (Max): 0.5 dB
Extinction Ratio (Min): 18 dB
Splitting Ratio: Variable, 0% to 100%
Wavelength Range: 400 to 2000 nm (selectable)
Insertion Loss: Low
Bandwidth: Broad
Uniformity: Good
Package Size: Small
Directivity: High
Fiber Type: Single mode or polarization maintaining
Fiber Core/Cladding: 9/125 µm SM, 8/125 µm PM, 7/125 µm PM (depending on model)
Operating Wavelengths (SM): 1260–1650 nm
Operating Wavelengths (PM): 1450–1650 nm, 1290–1550 nm
Jacket Diameter: 0.9 mm (standard)
Fiber Length: 1 m (standard)
Connector Type: FC/APC (standard), others available

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

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Features

  • Variable Splitting Ratio: Precisely adjust the split ratio from 0% to 100% for maximum flexibility in optical power distribution.
  • Low Insertion Loss: Engineered for minimal optical loss, ensuring high transmission efficiency across all split ratios.
  • Broad Operating Wavelength Range: Selectable wavelength options from 400 nm to 2000 nm, suitable for a wide variety of applications.
  • Excellent Uniformity: Delivers consistent performance and uniform split ratios across the entire operating bandwidth.
  • Compact Design: Small package size allows for easy integration into space-constrained systems and modules.
  • High Directivity: Minimizes unwanted signal leakage and crosstalk for superior signal integrity.
  • Customizable Fiber Types: Available with single mode (SM) or polarization maintaining (PM) fibers, with customer-specified birefringence axis alignment for PM models.
  • Wide Connector Compatibility: Supports a range of connector types including FC/APC, FC/PC, SC, LC, MU, and more, for seamless integration into existing setups.
  • Flexible Fiber Lengths: Standard 1 meter fiber leads with options for custom lengths to meet specific installation requirements.
  • Robust Construction: Durable build quality ensures reliable performance in demanding laboratory and industrial environments.
  • Ideal for Multiple Applications: Perfect for use in optical amplifiers, fiber lasers, power monitoring, fiber gyroscopes, and coherent communication systems.
  • Easy Customization: Tailor the splitter to your exact needs with options for wavelength, fiber type, connector, and fiber length.

Applications

  • Optical Amplifiers
    Used for dynamic power splitting and monitoring in optical amplifier systems, enabling real-time adjustment of signal distribution and optimization of amplifier performance.
  • Fiber Lasers
    Essential for power balancing, feedback control, and output monitoring in fiber laser setups, supporting both research and industrial laser applications.
  • Power Monitoring
    Enables precise and adjustable tapping of optical signals for power measurement and system diagnostics in fiber optic networks and laboratory environments.
  • Fiber Optic Gyroscopes
    Facilitates variable signal splitting for enhanced sensitivity and calibration in fiber optic gyroscope systems used in navigation and inertial sensing.
  • Coherent Communications
    Supports advanced modulation formats and dynamic channel management in coherent optical communication systems by providing tunable signal splitting.
  • Optical Test and Measurement
    Ideal for laboratory and field testing, allowing flexible signal routing, loss measurements, and calibration in optical test benches.
  • Wavelength Division Multiplexing (WDM) Systems
    Used for variable channel splitting and power equalization in WDM networks, improving channel management and network flexibility.
  • Quantum Optics and Photonics Research
    Enables precise control of photon splitting ratios for quantum experiments, entanglement distribution, and photonic circuit prototyping.
  • Sensor Networks
    Provides adjustable signal distribution for fiber optic sensor arrays, enhancing sensitivity and multiplexing capabilities in structural health monitoring and environmental sensing.
  • Biomedical and Spectroscopy Applications
    Used in optical coherence tomography (OCT), fluorescence spectroscopy, and other biomedical imaging systems for tunable light distribution and signal balancing.
  • Research and Development
    Offers a versatile tool for R&D labs working on new fiber optic devices, systems integration, and prototyping of advanced photonic solutions.

Frequently Asked Questions

What is an evanescence based variable split ratio fiber splitter/coupler?
An evanescence based variable split ratio fiber splitter/coupler is an optical device that allows the user to dynamically adjust the splitting ratio of optical signals between two fibers from 0% to 100%. It uses side-polished fibers positioned close together to enable evanescent field coupling, and the coupling ratio is controlled by adjusting the distance between the fiber cores.
What are the main applications of a variable split ratio fiber splitter?
Variable split ratio fiber splitters are widely used in optical amplifiers, fiber lasers, power monitoring, fiber gyroscopes, and coherent communications. Their ability to precisely control the split ratio makes them ideal for applications requiring dynamic power distribution and monitoring in fiber optic networks.
What is the wavelength range supported by the evanescence based variable fiber splitter?
The evanescence based variable fiber splitter supports a broad wavelength range from 400 nm to 2000 nm, with standard models available for specific bands such as 1260–1650 nm, 1450–1650 nm, 1290–1550 nm, and others. Custom wavelength ranges can also be specified when ordering.
How does the variable splitting ratio mechanism work in this fiber splitter?
The variable splitting ratio is achieved by adjusting the distance between the cores of two side-polished fibers. As the distance changes, the amount of evanescent field coupling between the fibers changes, allowing the split ratio to be tuned continuously from 0% to 100% with minimal insertion loss.
What types of fibers and connectors are available for this variable splitter?
This variable splitter is available with both single mode (SM) and polarization maintaining (PM) fibers, with core/cladding sizes such as 9/125 µm, 8/125 µm, and 7/125 µm. Connector options include FC/APC, FC/PC, SC, SC/APC, LC, LC/APC, MU, ST, or no connector, with custom configurations available upon request.
What are the key features and benefits of the evanescence based variable fiber splitter?
Key features include a variable splitting ratio (0–100%), low insertion loss, broad bandwidth, good uniformity, compact package, and high directivity. These features ensure efficient, flexible, and reliable performance in demanding optical applications.
How do I order a custom variable split ratio fiber splitter and what information is required?
To order a custom variable split ratio fiber splitter, you need to specify the center wavelength and bandwidth, fiber type (single mode or polarization maintaining), connector type for each port, and required fiber length. Providing this information ensures the splitter is tailored to your specific application needs.

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

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