Tunable add-drop filter using an active whispering gallery mode microcavity
Optics
2014-04-08 v1 Instrumentation and Detectors
Abstract
An add-drop filter (ADF) fabricated using a whispering gallery mode resonator has different crosstalks for add and drop functions due to non-zero intrinsic losses of the resonator. Here, we show that introducing gain medium in the resonator and optically pumping it below the lasing threshold not only allows loss compensation to achieve similar and lower crosstalks but also tunability in bandwidth and add-drop efficiency. For an active ADF fabricated using an erbium-ytterbium co-doped microsphere, we achieved 24-fold enhancement in the intrinsic quality factor, 3.5-fold increase in drop efficiency, bandwidth tunability of 35 MHz and a crosstalk of only 2%.
Keywords
Cite
@article{arxiv.1308.6787,
title = {Tunable add-drop filter using an active whispering gallery mode microcavity},
author = {Faraz Monifi and Sahin Kaya Ozdemir and Lan Yang},
journal= {arXiv preprint arXiv:1308.6787},
year = {2014}
}
Comments
11 pages, 6 figures, 18 references