Abstract
Excitation of cladding modes has been achieved using long-period (LPGs) inscribed in an endlessly single-mode photonic crystal fiber (ESM PCF) by CO2 laser irradiation. Core-cladding mode coupling and recoupling has resulted in marked improvement in the evanescent field overlap throughout the cladding air channels in the PCF-LPG, compared to the PCF alone. Our numerical simulation has shown that design optimization of the PCF-LPG configuration can lead to a field power overlap as high as 22% with a confinement loss of less than 1 dB/m in the cladding mode.
Original language | English |
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Pages (from-to) | 507-512 |
Number of pages | 6 |
Journal | Optics Express |
Volume | 18 |
Issue number | 2 |
DOIs | |
State | Published - 18 Jan 2010 |