Temperature Insensitive and Low Cost Transversal Filters Based on Uniform Fibre Bragg Gratings

Jose MORA  Beatriz ORTEGA  Miguel V. ANDRES  Jose CAPMANY  Jose Luis CRUZ  Daniel PASTOR  Salvador SALES  

IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.7   pp.1251-1256
Publication Date: 2003/07/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Progress in Microwave and Millimeter-wave Photonics Technologies)
Category: Signal Generation and Processing Based on MWP Techniques
Bragg gratings,  tapered fiber,  transversal filters,  

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In this paper, we propose a new configuration to implement transversal filters with negligible temperature sensitivity and low cost. These microwave filters are based on uniform fibre Bragg gratings as slicing elements of a broadband optical source. By using a tapered fibre Bragg grating as a delay line, we show that the temperature effects are the same over each component of the RF-filter. Therefore, it is possible a total cancellation of the thermal effects. The performance of these filters is compared to previous techniques, such as a laser array approach.