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Long period grating in ZBLAN fiber using the pull-and-heat method
Optics Letters
|September 16, 2025
Summary
Researchers developed a pull-and-heat method for creating strong, uniform long-period gratings (LPGs) in fluoride fibers. This technique enables precise control over fiber tapering for improved optical component performance.
Area of Science:
- Optical Engineering
- Materials Science
- Fiber Optics
Background:
- Long-period gratings (LPGs) are crucial optical components.
- Fabricating LPGs in fluoride fibers presents unique challenges.
- Existing methods lack precision in controlling fiber deformation.
Purpose of the Study:
- To demonstrate a novel method for LPG inscription in fluoride fibers.
- To analyze fiber deformation under varying fabrication parameters.
- To develop a methodology for high-precision micro-tapering for low-loss LPGs.
Main Methods:
- Utilized the 'pull-and-heat' inscription technique.
- Investigated fiber deformation by varying heating temperature, duration, and tension.
- Developed a methodology for controlled micro-tapering of fiber regions.
Main Results:
- Successfully inscribed LPGs in fluoride fibers using the pull-and-heat method.
- Characterized fiber deformation under different thermal and tensile stresses.
- Demonstrated a methodology for precise micro-tapering, enabling low-loss LPG fabrication.
Conclusions:
- The pull-and-heat method offers a pathway to stronger LPGs.
- The proposed methodology provides high uniformity in grating periods.
- Controllable micro-tapering meets optical requirements for diverse applications.
