| Title |
Study on Optical Fiber Filter Allowing Inline Switching Between Transmission and Reflection Spectra in Two Short-Period Fiber Gratings |
| Authors |
Jihoon Kim ; Yong Wook Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2016.30.2.011 |
| Keywords |
Short-Period Fiber Grating ; Polarization ; Inline Switching ; Polarization-Diversity Loop |
| 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. |