| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Fabrication and Characterization of a 2×2 Microfiber Knot Resonator Coupler |
| A. A. Jasim1, A. Z. Zulkifli1, M. Z. Muhammad1, H. Ahmad2, S. W. Harun1,2** |
1Department of Electrical Engineering, University of Malaya 50603 Kuala Lumpur, Malaysia
2Photonics Research Center, Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia |
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Abstract A 2×2 microfiber knot resonator (MKR) coupler is demonstrated. The hybrid device is obtained by forming a knot within the coupling region of a microfiber coupler with a 50:50 splitting ratio. The microfiber coupler is successfully fabricated by laterally fusing and tapering two optical fibers using a flame-brushing technique. The coupler has an overlapping length of 40 mm with a uniform waist of around 5 μm . With an MKR structure, the coupler produces a resonant response at both output ports. The free spectral range of the output spectrum from both ports is obtained at 0.2 nm at a knot diameter of 260 μm . The resonance extinction ratio of the device varies from 2 to 6 dB while the calculated Q factor and finesse are ～25646 and 3.3, respectively, at both output ports.
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Received: 29 January 2012
Published: 31 July 2012
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| PACS: |
42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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81.07.-b
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(Nanoscale materials and structures: fabrication and characterization)
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42.79.Gn
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(Optical waveguides and couplers)
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