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Bamboo-like microfiber structures fabricated by one-step-tapering a fiber preform
Optics Express
|December 31, 2020
Summary
A novel one-step tapering technique enables the fabrication of complex structures on microfibers for optical communications and sensing. This method creates robust, bamboo-like microfiber devices with excellent spectral characteristics and stability.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
- Nanotechnology
Background:
- Microfiber-based optical structures are crucial for communications and sensing.
- Fabricating structures on fragile microfibers presents significant challenges, hindering practical applications.
Purpose of the Study:
- To develop a simplified, one-step technique for manufacturing intricate structures on microfibers.
- To demonstrate the fabrication of a bamboo-like microfiber device with long-period grating characteristics.
Main Methods:
- Femtosecond laser milling was used to create a sawtooth-shaped fiber preform.
- A one-step tapering process was applied to the preform to form periodic bumps.
- Spectral characteristics, refractive index response, and temperature coefficient were experimentally measured.
Main Results:
- A bamboo-like microfiber device with long-period grating properties was successfully fabricated.
- An extinction ratio of 18.2 dB at 1553.3 nm was achieved.
- A high refractive index sensitivity of ~875.02 nm/RIU and a temperature coefficient of ~5.78 pm/°C were recorded.
Conclusions:
- The one-step tapering-preform technique offers a flexible, reproducible, and stable method for microfiber structure fabrication.
- The fabricated structures show significant potential for advanced optical sensing and communication applications.
- Theoretical analysis confirmed good agreement with experimental findings, validating the technique.
