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10 Mar 2008

Volume 92, Issue 10, Articles (10xxxx)

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Appl. Phys. Lett. 92, 102101 (2008); http://dx.doi.org/10.1063/1.2890735 (3 pages)

Qing Wan, Jin Huang, Zhong Xie, Taihong Wang, Eric N. Dattoli, and Wei Lu
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Demonstration of a refractometric sensor based on optical microfiber coil resonator

Fei Xu and Gilberto Brambilla

Appl. Phys. Lett. 92, 101126 (2008); http://dx.doi.org/10.1063/1.2898211 (3 pages) | Cited 27 times

Online Publication Date: 14 March 2008

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We experimentally demonstrated a refractometric sensor based on a coated optical microfiber coil resonator. It is robust, compact, and comprises an intrinsic fluidic channel. A sensitivity of about 40 nm/RIU (refractive index unit) has been measured, in agreement with predictions.
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42.81.Pa Sensors, gyros
07.60.Hv Refractometers and reflectometers

Nonlinear long-period gratings in As2Se3 chalcogenide fiber for all-optical switching

H. C. Nguyen, D.-I. Yeom, E. C. Mägi, L. B. Fu, B. T. Kuhlmey, C. Martijn de Sterke, and B. J. Eggleton

Appl. Phys. Lett. 92, 101127 (2008); http://dx.doi.org/10.1063/1.2898213 (3 pages) | Cited 5 times

Online Publication Date: 14 March 2008

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We present experimental demonstration of all-optical switching using long-period gratings (LPGs) in highly nonlinear As2Se3 chalcogenide fiber. We use a 135 mm grating which is generated using acoustic waves. We characterize the nonlinear pulse propagation through the LPG using picosecond pulses tuned to different wavelengths with respect to the grating resonance. We compare the results with numerical simulations and observe switching at pulse peak powers around 50 W, two orders of magnitude smaller than previously demonstrated in silica.
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42.70.Ce Glasses, quartz
42.79.Dj Gratings
42.65.Pc Optical bistability, multistability, and switching, including local field effects
42.81.-i Fiber optics
42.79.Ta Optical computers, logic elements, interconnects, switches; neural networks
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