High Strength FBG - Non-stripped Coating FBG - High Tensile Strength and High Strain FBG - Strain ≥25000με

Product Aliases: Femtosecond laser FBG, high-strength FBG, high-reliability FBG, high-temperature FBG, polyimide FBG, non-stripped coating FBG, High-strain Fiber Bragg Grating, High-tensile Fiber Bragg Grating.

This product is manufactured by OFSCN. The fiber Bragg grating is written on high-strength optical fiber using femtosecond laser writing method, direct writing through the coating without stripping, polyacrylate/polyimide coated, high-strength fiber Bragg grating (FBG).

It can be purchased individually or as an accessory for the OFSCN® FBG strain sensors (FBG strain gauge), FBG stress sensors (FBG tension gauge).

The parameters provided for the FBG are for reference only, as the characteristics may vary slightly after the FBG is integrated into a FBG sensor. Customization options are available to meet different user requirements.

Physical Demonstration Video of Fiber Bragg Grating (FBG):

Features of OFSCN® High-Strength Fiber Bragg Grating:

Traditional FBGs are typically produced using UV photolithography, which requires the removal of the fiber coating to overcome UV light blocking and absorption. This process, followed by re-coating after FBG writing, compromises the strength and tensile properties of the final FBG product.

The high-strength fiber Bragg grating produced by DCYS is made of selected OFSCN® high-strength optical fiber and is directly written by femtosecond laser. There is no need to strip the coating layer during the production process of the fiber Bragg grating. The OFSCN® high-strength fiber Bragg grating has the advantages of no damage, high strength, high tensile strength, and flexible wavelength customization.

It can be used in OFSCN® capillary seamless steel tube series FBG strain sensors (FBG strain gauge), FBG stress sensors (FBG tension gauge), and can also be used as standalone FBG sensors without encapsulation.

Parameters of OFSCN® High-Strength Fiber Bragg Grating (FBG):

Parameters
Fiber Tail + FBG Length	Length is determined by customer specifications
FBG Operating Temperature Range	-200  to 300°C (Celsius)
Fiber Type for FBG	High-Strength fiber
Coating for FBG	Acrylate/Polyimide
FBG Wavelength Deviation	+/-0.3nm
Multi-Point Capability	Customizable FBG array
FBG Type	Standard Fiber bragg grating
FBG Length	5 to 8mm
FBG Center Wavelength	Standard C-band: 1525 to 1565 nm, expandable to 1510 to 1590 nm
FBG Bandwidth @ 3dB	≤0.4nm
FBG Side-Mode Suppression Ratio (SMSR)	≥15db
FBG Reflectivity	≤75% (customizable)
FBG Storage Temperature	-40 ~ 85℃ (Celsius)

FBG Strain

Standard: ≥ 25,000 με (microstrain), custom: ≥ 40,000 με

OFSCN® High-Strength FBG Fiber Parameters:

Click here to see the parameters for available OFSCN® High Strength FBG fibers:

300℃ SM Polyimide Optical Fiber - High & Low Temperature Optical Fiber - Doped/Pure Silicon Core Optical Fiber

Attachment 1:

Attachment 2:

The Y-axis unit is με, and the X-axis unit is pm

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Features of OFSCN® high-strength FBG:

• High Reliability and High Mechanical Strength: By using selected high-strength polyimide-coated fibers and the non-invasive femtosecond laser writing process, the product retains the fiber's original mechanical strength to the greatest extent. This significantly reduces the risk of fiber breakage during production and use, ensuring long-term stability in demanding environments.
• Excellent High-Temperature Resistance: The polyimide coating can withstand temperatures up to 300℃ or higher, ensuring the FBG's long-term stability in high-temperature environments. The femtosecond laser writing process does not damage the coating, further preserving this critical characteristic.
• No Coating Stripping Required: The femtosecond laser can write the grating directly into the fiber core through the polyimide coating. This eliminates the traditional process of stripping and recoating, improving production efficiency while avoiding potential damage to the optical fiber.
• Compact Size and Chemical Resistance: The thin polyimide coating results in a smaller fiber diameter. The coating also provides excellent chemical resistance, allowing for stable operation in harsh environments like oil and gas, and chemical industries.
• Flexible Application: The customizable grating lengths of 2mm, 3mm, 4mm, 5mm, 6mm, and 8mm provide customers with more precise options to meet diverse measurement needs.

Possible Application Scenarios and Industries of OFSCN® high-strength FBG:

Given its outstanding reliability, high mechanical strength, high-temperature resistance, and non-invasive production method, this FBG/FBG array is well-suited for various specialized and demanding applications.

Application Scenarios Examples of OFSCN® high-strength FBG:

• Packaged for Use: It can be used as the core sensing element in packaged sensors for:
  • Aerospace: Monitoring strain and vibration on engine components and airframes in extreme temperature and stress conditions. Its high reliability makes it particularly suitable for long-term health monitoring of critical components.
  • Civil Engineering: Used for structural health monitoring of large-scale infrastructure like bridges, tunnels, and dams. Its high strength can better resist accidental damage during construction and use.
  • Industrial Applications: Monitoring stress and strain in high-temperature and high-pressure equipment (e.g., boilers, pipelines). Its high reliability ensures the long-term accuracy of measurement data.
• Used Directly Without Packaging: In laboratory or research settings, this FBG can be used directly for:
  • High-Temperature and High-Stress Experiments: Directly measuring parameters like stress, strain, and vibration on high-temperature and high-stress equipment or materials. Its high strength can withstand higher experimental loads.
  • Harsh Environment Monitoring: Performing structural health monitoring directly in corrosive or high-temperature environments, such as those found in the chemical or metallurgical industries, without concerns about the fiber itself being damaged by the environment.