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http://dx.doi.org/10.3807/KJOP.2005.16.5.401

Tunable Mechanically Formed Long-Period Fiber Gratings using Periodically Arrayed Metal Wires  

Sohn, Kyung-Rak (Division of Radio and Information Communication Engineering, Korea Maritime University)
Kim, Kwang-Taek (Department of Optoelectronics, Honam University)
Publication Information
Korean Journal of Optics and Photonics / v.16, no.5, 2005 , pp. 401-405 More about this Journal
Abstract
In this paper, we have presented mechanically formed long-period fiber gratings using periodically arrayed brass wires with a $250-{\mu}m$ diameter and realized the function of current-controlled wavelength-tuning. With the thermo-optic effect of the surrounding medium around the fiber cladding, the continuous displacement of the resonance wavelengths is achieved through the resistant heat of the wire which changes the refractive index of surrounding material. The tunability for each mode as a function of an applied electrical power is investigated. When the glycerin is used as a thermo-optic material, the measured tuning ranges of $LP_{03}$ and $LP_{04}$ within electrical power of 20 W reach to 14 nm and 48 nm, respectively. The experimental results are in good agreement with the theoretical that which is analyzed by a geometric-optics approximation.
Keywords
Long period grating; Tunable filter; Mechanically formed grating; Thermo-optic effect;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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