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Microphotonic wideband tapped optical delay line FIR filter noise analysis
Author(s) -
Jeffery R. D.,
Alameh K. E.
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.20857
Subject(s) - wideband , electronic engineering , filter (signal processing) , line filter , narrowband , noise (video) , transimpedance amplifier , electrical engineering , broadband , engineering , amplifier , computer science , telecommunications , operational amplifier , artificial intelligence , image (mathematics) , cmos
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
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