Single and triple output coherence-free microwave photonic filter using a 3 × 3 collinear coupler in a Sagnac fiber loop
✍ Scribed by G. Ning; P. Shum; J. Zhou
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 236 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
New structures that can realize single and triple output coherence‐free microwave photonic filter are presented. They are based on a Sagnac loop interferometer containing a single drive intensity modulator and a 3 × 3 collinear coupler, and no non‐reciprocal bias unit is required. Notch responses are obtained by modulating the clockwise and counterclockwise propagating waves inside the Sagnac loop at different times. Theoretical analysis is obtained for both DFB laser source and broad‐band source. Measured results verify the theoretical expressions and demonstrate robust notch filter responses. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 744–747, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23218