9 July 2003 Surface modes and loss in air-core photonic bandgap fibers
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Proceedings Volume 5000, Photonic Crystal Materials and Devices; (2003); doi: 10.1117/12.480052
Event: Integrated Optoelectronics Devices, 2003, San Jose, CA, United States
Abstract
We briefly review recent progress in the fabrication and characterization of air-core photonic band-gap fibers. These are silica fibers with an hexagonal array of air holes in the cladding, and a larger air hole creating the core. Improved structural uniformity transverse to the fiber axis and down the fiber axis has yielded fibers with better transmission characteristics. We have measured a minimum loss of 13 dB/km at 1500 nm for a 100 m length of our fiber. This is a marked improvement over previous loss measurements for air-core fibers of any kind. A comparison of observed spectra and calculated gap modes suggests that coupling between surface modes and core modes may be an important contributor to the remaining loss. We present a detailed analysis of the expected losses associated with mode crossings between the fundamental core mode and surface modes, showing that Lorentzian-shaped loss peaks are predicted.
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Douglas C. Allan, Nicholas F. Borrelli, Michael T. Gallagher, Dirk Müller, Charlene M. Smith, Natesan Venkataraman, James A. West, Peihong Zhang, Karl W. Koch, "Surface modes and loss in air-core photonic bandgap fibers", Proc. SPIE 5000, Photonic Crystal Materials and Devices, (9 July 2003); doi: 10.1117/12.480052; https://doi.org/10.1117/12.480052
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KEYWORDS
Optical fibers

Cladding

Glasses

Silica

Refractive index

Transform theory

Photonic crystal fibers

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