Tunable and programmable optical bandpass filter
2007 (English)In: Journal of Optics. A, Pure and applied optics, ISSN 1464-4258, E-ISSN 1741-3567, Vol. 9, no 11, 1057-1061 p.Article in journal (Refereed) Published
We demonstrate a novel tunable and programmable optical bandpass filter with a transmission peak less than 5 pm wide that is tunable over 18.5 nm. The number of transmission windows within the stop band, as well as each window's position and strength, is set by applying a heat profile to a chirped fibre Bragg grating with the aid of a thermal printer head comprising a 640 pixel array. It is shown that the width of a transmission peak formed by local heating is mainly determined by the refractive index modulation depth and chirp rate and not by the width of the heated region.
Place, publisher, year, edition, pages
2007. Vol. 9, no 11, 1057-1061 p.
Bragg gratings; Fibre optics; Tunable filters; Bragg gratings; Fiber lasers; Laser tuning; Refractive index; Thermal effects; Chirp rate; Modulation depth; Optical bandpass filter; Tunable filters
IdentifiersURN: urn:nbn:se:kth:diva-7133DOI: 10.1088/1464-4258/9/11/015ISI: 000250630000015OAI: oai:DiVA.org:kth-7133DiVA: diva2:12051
QC 20100813. Uppdaterad från Submitted till Published 20100813.2007-05-162007-05-162010-08-13Bibliographically approved