Abstract
Bandpass filters with square shape amplitude responses and well-controlled dispersion characteristics are achieved by accurate apodization of Bragg grating structures in silicon-on-insulator waveguides. For these devices, precise tailoring of their frequency response typically requires low coupling coefficients and relatively long on-chip propagation lengths. These challenges are addressed by implementing apodization by phase-modulation and using wider strip waveguides to reduce phase noise. This design approach is demonstrated with a dispersion-less narrowband filter and a chirped bandpass filter.
Original language | English |
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Pages (from-to) | 736-739 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 40 |
Issue number | 5 |
Early online date | 20 Feb 2015 |
DOIs | |
Publication status | Published - 1 Mar 2015 |
Keywords
- bandpass filters
- Bragg grating
- waveguides