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Thermal approach to classifying sequentially written fiber Bragg gratings
Optics Letters
|February 1, 2019
Summary
Thermal treatment classifies fiber Bragg gratings (FBGs) written sequentially. This method identifies four FBG types based on fiber material and writing energy, enabling precise characterization for optical fiber sensing applications.
Area of Science:
- Optoelectronics
- Materials Science
- Fiber Optics
Background:
- Fiber Bragg gratings (FBGs) are crucial optical components.
- Sequential writing techniques allow for complex grating structures.
- Distinguishing between sequentially written FBGs is challenging.
Purpose of the Study:
- To develop a method for classifying sequentially written fiber Bragg gratings.
- To identify different types of FBGs based on fabrication parameters.
- To enable reliable FBG characterization for various applications.
Main Methods:
- Subjecting sequentially written FBGs in SMF28 and GF4A fibers to controlled thermal treatment.
- Analyzing changes in grating properties under thermal stress.
- Utilizing small spot direct ultraviolet writing techniques.
Main Results:
- Successfully demonstrated thermal classification of sequentially written FBGs.
- Identified four distinct types of FBGs.
- Correlated FBG types with specific fiber materials (SMF28, GF4A) and writing fluence levels.
Conclusions:
- Thermal treatment is an effective method for classifying sequentially written FBGs.
- The developed technique allows for differentiation based on fabrication parameters.
- This classification is vital for ensuring performance in optical sensing and communication systems.
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