Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26222
Title: Investigation of long-period grating resonances in hollow-core photonic bandgap fibers
Authors: Jin, L
Jin, W 
Ju, J
Wang, Y
Keywords: Long-period grating (LPG)
photonic bandgap fiber
Issue Date: 2011
Publisher: Institute of Electrical and Electronics Engineers
Source: Journal of lightwave technology, 2011, v. 29, no. 11, 5742661, p. 1708-1714 How to cite?
Journal: Journal of lightwave technology 
Abstract: The mode-coupling processes of long-period gratings (LPGs) fabricated in hollow-core photonic bandgap fibers are investigated. The LPGs are formed by periodic structural deformations induced by local heating generated by use of a pulsed CO 2 laser. Highly polarization-dependent grating resonances are observed in the transmission spectrum of the LPGs and found to be due to coupling from the fundamental to higher order core modes. The mode-coupling process is understood based on coupled local-mode theory: A single deformation of the holey cladding modifies the local-mode field profiles and induces fractional energy transfer between the fundamental and the higher order modes. Resonant coupling between a phase-matched fundamental/higher order mode pair is excited by having multiple such deformations arranged periodically along the fiber. The LPG spectrums are numerically modeled by solving the coupled local-mode equations at different wavelengths and found in agreement with the experimentally measured results.
URI: http://hdl.handle.net/10397/26222
ISSN: 0733-8724
EISSN: 1558-2213
DOI: 10.1109/JLT.2011.2138679
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