A new technique for generating extremely small time-delay steps as a function of wa¨elength is presented. The fiber unit comprises o¨erwritten gratings at different Bragg wa¨elengths with ¨arying coupling coefficients, and hence ¨arying effecti¨e reflection points. The shortest delay step demonstrat
Photonic Signal Processing of High-Speed Signals Using Fiber Gratings
✍ Scribed by Robert A. Minasian
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 571 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1068-5200
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✦ Synopsis
Methods for wideband photonic signal processing using fiber delay lines and Bragg grating sampling elements are described. These processors provide new capabilities for the realization of high time-bandwidth operation and high resolution performance. Multiple wavelength techniques with discrete and chirped Bragg gratings are described, which have high capacity signal processing functions using dense parallel signal processing techniques. Both fixed and tunable or reconfigurable processors using wavelength control to change the sampling time are discussed. A range of grating-based signal processors, including high Q microwave filtering, frequency discriminators, widely tunable filters, fast and adaptive signal correlators, and truetime delay beamforming in phased array antennas are described. ᮊ 2000
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