| Autor: |
Jeffery, R. D., Alameh, K. E. |
| Předmět: |
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| Zdroj: |
Microwave & Optical Technology Letters; 6/20/2005, Vol. 45 Issue 6, p476-480, 5p, 1 Diagram, 5 Graphs |
| Abstrakt: |
MicroPhotonic broadband RF signal processors utilize true-time-delay methods to perform processing functions that cannot be achieved by conventional electronic methods. Using a tapped optical-delay line, a low-cost adaptive wideband FIR filter can be realized. We analyse the sources of noise for such a filter using commercially available VCSEL sources, PIN diodes, and transimpedance amplifiers. The power at each tap can be equal by using a suitably graded coating, or if the reflectivity is constant, there is an optimum reflectivity that maximizes the signal-to-noise ratio for a given number of taps, as we show in this paper. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 476–480, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20857 [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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