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http://dx.doi.org/10.5207/JIEIE.2016.30.2.011

Study on Optical Fiber Filter Allowing Inline Switching Between Transmission and Reflection Spectra in Two Short-Period Fiber Gratings  

Kim, Jihoon (Pukyong National University, School of Electrical Engineering)
Lee, Yong Wook (Pukyong National University, School of Electrical Engineering / Pukyong National University, Interdisciplinary Program of Biomedical Mechanical & Electrical Engineering)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.30, no.2, 2016 , pp. 11-19 More about this Journal
Abstract
By incorporating a polarization-diversity loop configuration, we have demonstrated the inline switching of transmission and reflection spectra of one of two short-period fiber gratings (SPFGs) with different resonance wavelengths without reconfiguring the filter structure. The proposed filtering apparatus consists of a fiber-pigtailed polarization beam splitter, two SPFGs, and three quarter-wave plates (QWPs). The proposed filter can independently choose the transmission or reflection spectrum of each SPFG through the appropriate adjustment of the orientation angles of the QWPs within the filter without additional optical switches and couplers. The average insertion loss, band rejection ratio, and side-mode suppression ratio of the fabricated filter were measured as ~4.59, ~17.88, and ~19.67dB, respectively.
Keywords
Short-Period Fiber Grating; Polarization; Inline Switching; Polarization-Diversity Loop;
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