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Related Experiment Video

Updated: May 9, 2026

Writing Bragg Gratings in Multicore Fibers

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

SU8 inverted-rib waveguide Bragg grating filter.

Cheng-Sheng Huang¹, Wei-Chih Wang

¹Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195, USA.

|August 6, 2013

Summary

This summary is machine-generated.

A novel fabrication method simplifies Bragg grating filter production using soft lithography and a reusable stamp. This technique enables efficient pattern transfer onto SU8 inverted-rib waveguides for optical applications.

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Area of Science:

Photonics and optical engineering
Materials science and nanotechnology
Microfabrication techniques

Background:

Bragg gratings are crucial components in optical communication systems for wavelength filtering.
Traditional fabrication methods for SU8 waveguide Bragg gratings can be complex and costly.
Soft lithography offers potential for simplified and scalable micro/nanofabrication.

Purpose of the Study:

To present a simplified fabrication process for SU8 inverted-rib waveguide Bragg grating filters.
To demonstrate the effectiveness of solvent assisted microcontact molding (SAMIM) for grating pattern transfer.
To characterize the performance of the fabricated Bragg grating filter.

Main Methods:

Fabrication of a composite polydimethylsiloxane (PDMS) stamp for grating pattern transfer.
Utilizing reactive ion etching (RIE) for waveguide definition.
Employing solvent assisted microcontact molding (SAMIM) to transfer the grating onto an SU8 inverted-rib waveguide.
Characterization of the optical transmission spectra of the fabricated filter.

Main Results:

Successful fabrication of an SU8 inverted-rib waveguide Bragg grating filter.
Demonstration of a reusable composite grating stamp with no degradation over multiple uses.
Observation of an attenuation dip of -7 dBm at 1550 nm.
Characterization of the grating with a period of 0.492 μm on a waveguide of 6.6 μm width and 4 μm height.

Conclusions:

The presented SAMIM technique significantly simplifies the fabrication of Bragg grating filters.
The composite PDMS stamp is durable and suitable for repeated use, reducing fabrication costs.
The fabricated filter demonstrates effective wavelength filtering capabilities at 1550 nm, suitable for optical applications.