Lasers, Fiber Optics, and Communications

Second-order fiber interleaving filter based on polarization-diversified loop

[+] Author Affiliations
Kyongsoo Park, Sungwook Choi, Seul-Lee Lee, Jun Hyeok Jeong, Sun Jae Jeong, Nouaze Joseph Christian, Min Seok Kim

Pukyong National University, Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering, Busan, Republic of Korea

Jihoon Kim

Pukyong National University, School of Electrical Engineering, Busan, Republic of Korea

Hyun Wook Kang, Seung Yun Nam, Junghwan Oh

Pukyong National University, Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering, Busan, Republic of Korea

Pukyong National University, Department of Biomedical Engineering, Busan, Republic of Korea

Yong Wook Lee

Pukyong National University, Interdisciplinary Program of Biomedical Mechanical and Electrical Engineering, Busan, Republic of Korea

Pukyong National University, School of Electrical Engineering, Busan, Republic of Korea

Opt. Eng. 56(6), 066108 (Jun 16, 2017). doi:10.1117/1.OE.56.6.066108
History: Received March 16, 2017; Accepted May 24, 2017
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Abstract.  A second-order fiber interleaving filter that can provide a channel interleaving capability in second-order comb spectra is proposed and demonstrated on the basis of a polarization-diversified loop comprised of a four-port polarization beam splitter, four rotatable half-wave plates (HWPs), and three high birefringence fiber (HBF) segments. Each HBF segment is positioned between two adjoining HWPs, and two HWPs located among the three HBF segments determine the effective angular orientation difference among their principal axes, or fast and slow axes. At specific orientation angles of the four HWPs, second-order comb spectra such as flat-top and narrow-band ones could be obtained with a free spectral range (FSR) of 0.792  nm. In particular, the frequency interleaving of these second-order comb spectra, that is, a half FSR switching, could be implemented by controlling two out of four HWPs, which is the first demonstration of the interleaving operation in second-order comb spectra without expensive birefringence modulators. These spectral characteristics of the proposed filter were theoretically predicted and experimentally demonstrated.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Kyongsoo Park ; Sungwook Choi ; Seul-Lee Lee ; Jun Hyeok Jeong ; Sun Jae Jeong, et al.
"Second-order fiber interleaving filter based on polarization-diversified loop", Opt. Eng. 56(6), 066108 (Jun 16, 2017). ; http://dx.doi.org/10.1117/1.OE.56.6.066108


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