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Description

The Athermal Packaged Fiber Bragg Grating (FBG) is a precision-engineered optical sensing component designed to deliver stable and reliable performance in environments where temperature fluctuations are a concern. Unlike standard FBGs, this athermal variant incorporates a specialized packaging sleeve that effectively compensates for the inherent temperature coefficient of the fiber grating. By utilizing materials with carefully selected thermal properties, the device minimizes wavelength drift caused by temperature changes, ensuring consistent and accurate signal reflection.

This advanced encapsulation technique results in excellent temperature stability, with the FBG maintaining a low temperature coefficient—typically around 1 pm/°C—across a broad operational range from -10°C to 60°C. Such stability is crucial for applications requiring long-term reliability and minimal recalibration, such as distributed sensing, structural health monitoring, and precision wavelength referencing in optical networks.

The Athermal Packaged FBG is particularly well-suited for use in Dense Wavelength Division Multiplexing (DWDM) systems, where it serves as a wavelength reference or channel filter. Its low insertion loss, high channel isolation, and minimal polarization dependent loss (PDL) make it an ideal choice for both regional and long-haul optical communication networks. The device supports a wide center wavelength range (1460–1610 nm) and is compatible with standard single-mode fibers (SMF-28 or equivalent), ensuring seamless integration into existing fiber optic infrastructures.

Designed for versatility, the FBG is available with various optical connectors and customizable pigtail lengths, allowing for easy adaptation to specific installation requirements. Its robust construction and wide operating temperature range (-40°C to +85°C) further enhance its suitability for deployment in demanding industrial, telecommunication, and sensing environments.

Athermal Packaged Fiber Bragg Grating FBG Sensor Low Insertion Loss

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Specifications

Center Wavelength Range: 1460 – 1610 nm
FBG Length: Not Specified
Reflectivity: >1%
Center Wavelength: 1460~1610 nm
Bandwidth (FWHM): >0.2 nm
Insertion Loss: <0.2 dB
SLSR: >15 dB
PDL: <0.1 dB
Wavelength Shift: <80 pm/℃ (-5℃~+70℃)
Fiber Type: SMF-28 or Compatible
Dimension: 5.5*64 mm
Pigtail Length: 1 m (Typical), or Custom
Optical Connector: Bare Fiber, FC/APC, SC/APC, or Custom
Operating Temperature: -40~+85 ℃

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Features

  • Athermal Packaged Fiber Bragg Grating (FBG): Advanced packaging compensates for temperature-induced wavelength drift, ensuring stable performance across varying environments.
  • Ultra-Low Insertion Loss: Insertion loss less than 0.2 dB, minimizing signal attenuation for high-performance optical networks.
  • Excellent Channel Isolation: Superior channel isolation with SLSR greater than 15 dB, reducing crosstalk and enhancing signal integrity.
  • Wide Center Wavelength Range: Available in 1460 nm to 1610 nm, suitable for a broad range of DWDM applications.
  • High Temperature Stability: Maintains wavelength shift of less than 80 pm/°C over -5°C to +70°C; operational from -40°C to +85°C for reliable use in harsh environments.
  • Low Polarization Dependent Loss (PDL): PDL less than 0.1 dB, ensuring consistent performance regardless of polarization state.
  • Flexible Channel Spacing: Supports both 100G and 50G channel spacing for versatile deployment in dense wavelength division multiplexing (DWDM) networks.
  • Customizable Options: Available with bare fiber, FC/APC, SC/APC connectors, and customizable pigtail lengths to meet specific installation requirements.
  • Compact Design: Small form factor (5.5 mm x 64 mm) allows easy integration into various optical systems.
  • High-Quality Fiber Compatibility: Utilizes SMF-28 or compatible fibers for broad compatibility with industry-standard optical networks.
  • Long-Term Reliability: Excellent long-term temperature characteristics ensure stable operation and minimal maintenance.
  • Ideal for Multiple Applications: Perfect for regional and long-haul DWDM networks, wavelength referencing, and precision sensing applications.

Applications

  • Dense Wavelength Division Multiplexing (DWDM) Networks: Ideal for use in regional and long-haul DWDM systems, enabling high-capacity data transmission by providing stable wavelength references and channel spacing.
  • Wavelength Reference Modules: Serves as a precise wavelength reference in optical communication systems, ensuring accurate channel alignment and system calibration.
  • Optical Add-Drop Multiplexers (OADM): Used in OADM devices for selective channel dropping and adding, improving network flexibility and scalability.
  • Optical Channel Monitoring: Enables real-time monitoring of individual channels in fiber optic networks, supporting network management and fault detection.
  • Temperature-Insensitive Sensing: Suitable for environments with fluctuating temperatures, such as industrial automation, due to its athermal packaging and minimal wavelength drift.
  • Fiber Optic Sensors: Utilized in strain, pressure, and structural health monitoring applications where stable wavelength performance is critical.
  • Laser Stabilization: Provides a stable reference for laser wavelength locking in scientific and industrial laser systems.
  • Telecommunications Infrastructure: Enhances the reliability and performance of backbone and metropolitan area networks by maintaining channel integrity under varying environmental conditions.
  • Research and Development: Used in laboratories and R&D centers for optical component testing, calibration, and prototyping of advanced photonic systems.
  • Medical and Biomedical Sensing: Applied in medical diagnostics and monitoring systems where precise and stable optical measurements are required.
  • Military and Aerospace Applications: Suitable for deployment in harsh environments due to its robust temperature compensation and long-term stability.
  • Oil & Gas and Energy Sector: Used for distributed sensing in pipelines, refineries, and power plants, providing reliable data in challenging temperature conditions.

Frequently Asked Questions

What is an Athermal Packaged Fiber Bragg Grating (FBG)?
An Athermal Packaged Fiber Bragg Grating (FBG) is a fiber optic sensor that uses a special packaging sleeve to compensate for temperature-induced wavelength shifts. This design ensures stable performance by minimizing the impact of temperature changes on the FBG's reflected wavelength, making it ideal for precise sensing and telecommunication applications.
How does the athermal packaging of the FBG compensate for temperature changes?
The athermal packaging uses a sleeve made from a material with a negative temperature coefficient, which counteracts the positive temperature coefficient of the fiber grating. This compensation minimizes wavelength drift caused by temperature fluctuations, resulting in a temperature coefficient as low as 1 pm/°C within the -10°C to 60°C range.
What are the main applications of Athermal Packaged FBGs?
Athermal Packaged FBGs are commonly used in regional and long-haul Dense Wavelength Division Multiplexing (DWDM) networks as wavelength references, as well as in optical sensing applications where temperature stability and precise wavelength control are critical.
What are the key specifications of the Athermal Packaged FBG?
Key specifications include a center wavelength range of 1460–1610 nm, bandwidth (FWHM) greater than 0.2 nm, insertion loss less than 0.2 dB, side lobe suppression ratio (SLSR) over 15 dB, polarization dependent loss (PDL) under 0.1 dB, and an operating temperature range from -40°C to +85°C.
What fiber types and connectors are available for the Athermal Packaged FBG?
The Athermal Packaged FBG is compatible with SMF-28 or equivalent single-mode fibers. It can be supplied with bare fiber, FC/APC, SC/APC connectors, or customized connector options to suit specific installation requirements.
How does the Athermal Packaged FBG compare to standard FBGs in terms of temperature stability?
Compared to standard FBGs, the athermal packaged version offers significantly improved temperature stability. Its specialized packaging reduces wavelength shift to less than 80 pm across a wide temperature range (-5°C to +70°C), making it more reliable for applications where temperature fluctuations are a concern.
What is the typical pigtail length and can it be customized?
The typical pigtail length for the Athermal Packaged FBG is 1 meter, but it can be customized according to customer requirements to fit different installation scenarios.

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

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