Characteristics of the transmission spectrum of the long period fiber gratings based on the coupling of core mode to the higher order cladding modes
Chinese Optics Letters, Vol. 1, Issue 10, pp. 573-575 (2003)
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Abstract
The characteristics of the transmission spectrum of the Long-period fiber gratings (LPFGs) based on the coupling of core mode to a higher order cladding mode (HE mode) are investigated using the coupled mode theory. This kind of LPFGs is different from that based on the coupling of core mode to a lower order cladding mode because of the effect of the coupling of core mode to EH cladding mode. When the cladding mode order is higher, the coupling coefficients of core mode to HE and EH cladding modes are comparable and both of the propagation constants of HE and EH cladding modes approach, so the spectrum has an additional loss peak. The bandwidth of LPFG based on the coupling of core mode to different cladding mode differs greatly. With the change of the mode orders from lower to higher, the transmission spectrum changes from narrow to wide and more narrow.
© 2005 Chinese Optics Letters
OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
Citation
Zijia Zhang and Wenkang Shi, "Characteristics of the transmission spectrum of the long period fiber gratings based on the coupling of core mode to the higher order cladding modes," Chin. Opt. Lett. 1, 573-575 (2003)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-1-10-573
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