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Waveguide Bragg gratings in Ormocer hybrid polymers.

Maiko Girschikofsky, Michael Förthner, Mathias Rommel

|July 14, 2016

Summary

Researchers fabricated Bragg gratings in Ormocer hybrid polymer waveguides using deep-UV laser radiation. This method achieved high reflectivity (up to 98%) and narrow bandwidths (down to 120 pm) for optical applications.

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Area of Science:

Materials Science
Optoelectronics
Photonics

Background:

Inorganic-organic hybrid polymers (Ormocers) offer tunable optical properties.
Waveguide Bragg gratings are crucial components in integrated photonic circuits.
Efficient fabrication methods for high-performance gratings are needed.

Purpose of the Study:

To report the fabrication of Bragg gratings in Ormocer rib-type waveguides.
To investigate the influence of laser fluence and grating length on grating characteristics.
To compare experimental results with numerical simulations.

Main Methods:

Interferometric phase mask technique combined with deep-UV laser radiation.
Fabrication of Bragg gratings within rib-type waveguides.
Characterization of transmission and reflection spectra.

Main Results:

Successfully fabricated waveguide Bragg gratings in UV-cured Ormocer.
Achieved high reflectivities up to 98%.
Obtained narrow bandwidths down to 120 pm, dependent on laser fluence and grating length.

Conclusions:

The interferometric phase mask technique is effective for creating high-performance Bragg gratings in Ormocer waveguides.
Optimized laser fluence and grating length are key to achieving desired spectral characteristics.
This fabrication method holds promise for advanced integrated photonic devices.