Abstract
A new design of temperature-independent Mach-Zehnder interferometer (MZI) based optical filter involving a combined use of silicon (Si) wire waveguides and slot waveguides is presented. The ratio of the path-length difference for the two types of waveguides is introduced to tune the thermal performance of the filtering wavelength. This ratio and its derived parameters render a high-level of flexibility for optimizing the design of interferometers based on optical path-length difference. By adjusting the path-length difference ratio for Si-wire waveguides and slot waveguides in the asymmetric arms of the MZI, an ideal temperature-independent optical filter can be obtained, while the modified interference order is enhanced. The proposed method is verified via a two-dimensional finite difference time domain simulation.
Original language | English (US) |
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Pages (from-to) | 545-551 |
Number of pages | 7 |
Journal | Journal of Modern Optics |
Volume | 57 |
Issue number | 7 |
DOIs | |
State | Published - Apr 2010 |
Funding
Huamao Huang thanks the China Scholarship Council for financial support.
Keywords
- Mach-Zehnder interferometer
- Optical filter
- Silicon wire
- Slot waveguide
- Temperature-independent
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics