Thermo-Optic Switching Effect Based on Fluid-Filled Photonic Crystal Fiber
ABSTRACT We report a thermo-optic switching effect with a high extinction ratio of 30 dB by means of filling a fluid into air holes of a solid-core photonic crystal fiber (PCF). Such an effect can perform a turn on-off operation of the transmitted light via a small temperature adjustment of ??10??C. The switching function attributes to the absorption of the filled fluid in combination with the interaction between the core mode and the excited ??fluid rod?? modes, resulting from the thermo-optic effect of the filled fluid.
- SourceAvailable from: ocean.kisti.re.kr[Show abstract] [Hide abstract]
ABSTRACT: We present both theoretically and experimentally the thermo-optic characteristics of micro-structured optical fiber (MOF) filled with mixed liquid. The performance of MOF depends on the efficient interaction between the fundamental mode of the transmitted light wave and the tunable thermo-optic materials in the cladding. The numerical simulation indicates that the confinement loss of MOF presents higher temperature dependence with higher air-filling ratios , longer incident wavelength and fewer air holes in the cladding. For the 4cm liquid-filled grapefruit MOF, we demonstrate from experiments that different proportions of solutions lead to tunable temperature sensitive ranges. The insertion loss and the extinction ratio are 3~4 dB and approximate 20 dB, respectively. The proposed liquid-filling MOF will be developed as thermo-optic sensor, attenuator or optical switch with the advantages of simple structure, compact configuration and easy fabrication.Journal of the Optical Society of Korea 01/2013; 17(3). · 0.96 Impact Factor
Conference Paper: Optical fiber gratings written in microstructured optical fibers[Show abstract] [Hide abstract]
ABSTRACT: Microstructured optical fibers are usually divided into two different types of fibers: solid-core Photonic crystal fibers (PCFs) and air-core photonic bandgaps fibers (PBGs). This paper presents the fabrication methods and applications of optical fiber gratings written in both solid-core PCFs and air-core PBGs. A sensitive stain sensor was demonstrated by use of a long period fiber gratings (LPFGs) written in solid-core PCFs. An in-fiber polarizer based on a LPFG is fabricated by use of a focused CO2 laser beam to notch periodically on a PCF. A novel LPFG was written in air-core photonic bandgap fibers by use of a CO2 laser periodically collapse air holes in the fiber cladding. Moreover, this paper also report fiber Bragg gratings written in small-core Ge-doped or pure-solid photonic crystal fibers with a two-beam interference technique employing an excimer or femtosecond laser.Photonics Global Conference (PGC), 2012; 01/2012
- [Show abstract] [Hide abstract]
ABSTRACT: In this letter, the fiber-optical power limiter and cut-off switch based on liquid core optical fiber (LCOF) is presented. As a core medium in the silica fiber, the Cargille mineral oil is used. In the metal coated tapered LCOF, a thermo-optical effect is employed. Attenuation exceeding 20 dB and response of 1.5 ms was documented by measurements.IEEE Photonics Technology Letters 02/2012; 24(4):297-299. · 2.18 Impact Factor