General principles for designing mode converters based on air-hole collapse in photonic crystal fibers |
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| Authors: | Sun Gui-Lin Chen Zi-Lun Xi Xiao-Ming Hou Jing Jiang Zong-Fu |
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| Affiliation: | 1. Department of Basic Sciences, Naval Aeronautical and Astronautical University, Yantai 264001, China;2. College of Optoelectronics Science and Engineering, National University of Defense Technology, Changsha 410073, China;1. Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan;2. Advanced Technology Laboratory, Fujikura Ltd., Sakura, Chiba 285-8550, Japan;1. Internetworks Research Laboratory, School of Computing, Universiti Utara Malaysia, 06010 Sintok, Kedah, Malaysia;2. Faculty of Computer Systems and Software Engineering, Universiti Malaysia Pahang, Pahang, Malaysia;1. OHB System AG, Manfred-Fuchs-Str. 1, 82234 Wessling, Germany;2. Heriot-Watt University, School of Engineering and Physical Sciences, Riccarton Campus, Edinburgh EH14 4AS, United Kingdom;3. Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany;4. Munich University of Applied Sciences, Photonics Laboratory, Lothstr. 39, 80335 Munich, Germany |
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| Abstract: | The general principles for designing mode converters based on air-hole collapse in photonic crystal fibers (PCFs) are theoretically investigated in this paper. The splice-like point in mode converters is found unnecessary for mode conversion; however, two different and separated cores, the adiabatic transitional part and the final merged core, are essential. Three structures are investigated using logical deduction, and the numerical results agree well with the logical conclusions. |
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