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Published on: November 30, 2012
Fabrication of integrated waveguide grating in azo polymers
Saber Jalilpiran1, Hamidreza Karimi-Alavijeh, Alireza Katebi-Jahromi
1Photonics Laboratory, Department of Electrical Engineering, School of Engineering, Shiraz University, Shiraz, Iran.
Optics Letters
|November 4, 2011
Summary
Researchers developed a new method to create integrated wavelength filters on polymer waveguides using a slit mask and direct writing. This technique efficiently filters light at specific wavelengths, enabling precise optical signal control.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
- Nanotechnology
Background:
- Integrated optical devices require precise fabrication of waveguide components.
- Azo-functionalized polymers offer unique photoresponsive properties for optical applications.
- Existing grating fabrication methods can be destructive or lack precision.
Purpose of the Study:
- To introduce a novel, non-destructive technique for fabricating gratings on azo-functionalized polymer waveguides.
- To demonstrate the use of these gratings as integrated wavelength filters.
- To achieve precise coupling of filtered light into the waveguide.
Main Methods:
- Fabrication of gratings using a slit mask and a fast, direct-writing method on azo-functionalized polymer films.
- Integration of the grating directly onto the waveguide structure.
- Characterization of the optical filtering performance.
Main Results:
- Successful fabrication of gratings with a width matching the waveguide.
- Achieved an attenuation of 13.4 dB at 1562 nm with a Full Width at Half Maximum (FWHM) of 3.45 nm.
- Demonstrated efficient coupling of filtered light into the waveguide, with other wavelengths passing undisturbed.
Conclusions:
- The developed slit mask and direct-writing method is a novel and effective technique for creating integrated wavelength filters on polymer waveguides.
- This method allows for precise control over light filtering and coupling within optical systems.
- The fabricated gratings show potential for advanced photonic device applications.
