Abstract
We demonstrate a compact reconfigurable 8-bit optical matching filter fabricated using 4% delta high-index-contrast silica-on-silicon waveguides. This planar lightwave circuit is based on an eighth-order tap-and-delay finite impulse response architecture. Multimode interference-based splitters/combiners along with variable optical attenuators and phase shifters allow us to tune and dynamically reconfigure all the taps and delays (filter coefficients) in the filter using a simple automated algorithm. The filter is designed to recognize 8-bit patterns in 40-Gb/s data streams and we demonstrate its working principle by successfully correlating 8-bit binary phase-shift-keyed patterns.
Original language | English (US) |
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Pages (from-to) | 694-696 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 20 |
Issue number | 9 |
DOIs | |
State | Published - May 1 2008 |
Keywords
- High-index-contrast waveguide
- Matched filter
- Optical communications
- Optical correlator
- Routing
- Transversal filter
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering