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Published on: November 30, 2012
In-fiber polymer-glass hybrid waveguide Bragg grating
Kaiming Zhou1, Xianfeng Chen, Yicheng Lai
1Photonic Research Group, Aston University, Birmingham B4 7ET, United Kingdom. k.zhou@aston.ac.uk
Optics Letters
|August 2, 2008
Summary
Researchers fabricated a novel hybrid waveguide grating using femtosecond laser patterning and chemical etching. This device exhibits high thermal responsiveness, making it suitable for advanced optical sensing applications.
Area of Science:
- Optoelectronics
- Materials Science
- Nanofabrication
Background:
- Fiber Bragg gratings (FBGs) are widely used in optical sensing.
- Integrating waveguides with FBGs can enhance device functionality.
- Thermal sensitivity is a critical parameter for many FBG-based sensors.
Purpose of the Study:
- To fabricate a hybrid waveguide grating structure.
- To investigate the thermal response of the fabricated device.
- To explore potential applications in optical sensing.
Main Methods:
- Engraving a microslot in an optical fiber using femtosecond laser patterning and chemical etching.
- Fabricating a hybrid waveguide grating by filling the microslot with epoxy and UV curing.
- Characterizing the thermal response of the device.
Main Results:
- Successfully fabricated a hybrid waveguide grating with a polymer core and glass cladding.
- The device demonstrated high thermal responsiveness.
- A linear thermal coefficient of 211 pm/°C was measured.
Conclusions:
- The developed hybrid waveguide grating is a promising platform for high-performance optical sensing.
- The fabrication method offers precise control over device geometry.
- The high thermal sensitivity enables accurate temperature monitoring.
