We report all-fiber polarization interference filters, known as Lyot and Lyot-Ohman filters, based on alternative concatenation of UV-inscribed fiber gratings with structure tilted at 45° and polarization maintaining (PM) fiber cavities. Such filters generate comb-like transmission of linear polarization output. The free spectral range (FSR) of a single-stage (Lyot) filter is PM fiber cavity length dependent, as a 20 cm long cavity showed a 26.6 nm FSR while the 40 cm one exhibited a 14.8 nm FSR. Furthermore, we have theoretically and experimentally demonstrated all-fiber 2-stage and 3-stage Lyot-Ohman filters, giving more freedom in tailoring the transmission characteristics.
Bibliographical noteThis paper was published in Optical Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-37-3-353. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
- all-fiber polarization interference filters
- Lyot and Lyot-Őhman filters
- alternative concatenation of UV-inscribed fiber gratings
- structure tilted at 45°
- polarization maintaining fiber cavities
Yan, Z., Mou, C., Wang, H., Zhou, K., Wang, Y., Zhao, W., & Zhang, L. (2012). All-fiber polarization interference filters based on 45°-tilted fiber gratings. Optics Letters, 37(3), 353-355. https://doi.org/10.1364/OL.37.000353