Fabrication of Polarization-Maintaining Photonic Crystal Fiber Coupler with Air Hole State Control Using CO2 Laser Irradiation Technique

Hirohisa YOKOTA; Yusuke ITO; Hiroki KAWASHIRI; Hideyuki KIUE; Hideo TOBITA; Yoh IMAI; Yutaka SASAKI

doi:10.1587/transele.E95.C.1689

Regular Section

Fabrication of Polarization-Maintaining Photonic Crystal Fiber Coupler with Air Hole State Control Using CO₂ Laser Irradiation Technique

Hirohisa YOKOTA, Yusuke ITO, Hiroki KAWASHIRI, Hideyuki KIUE, Hideo TOBITA, Yoh IMAI, Yutaka SASAKI

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Keywords: photonic crystal fiber, polarization-maintaining fiber, optical fiber coupler, polarization dependent coupling characteristics, CO₂ laser irradiation technique

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2012 Volume E95.C Issue 10 Pages 1689-1691

DOI https://doi.org/10.1587/transele.E95.C.1689

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Abstract

Polarization-maintaining photonic crystal fiber couplers (PM-PCFCs) were fabricated using a CO₂ laser irradiation technique. We could control the states of air holes in the tapered region of couplers by adjusting the laser power density in the fusion and the elongation processes. It was demonstrated that the air hole remaining PM-PCFC exhibited polarization-splitting characteristics and that the air hole collapsed PM-PCFC had polarization insensitive coupling characteristics.

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