A new all-in-fiber trace-level chemical sensing approach is demonstrated. Photoconductive structures, embedded directly into the fiber cladding along its entire length, capture light emitted anywhere within the fiber's hollow core and transform it directly into an electrical signal. Localized signal transduction circumvents problems associated with conventional fiber-optics, including limited s...

We describe a fiber-optic gyroscope based on the Sagnac effect, realized on a multiplexed telecom fiber network. Our loop encloses an area of 20 km² and coexists with Internet data traffic. This Sagnac interferometer is capable of detecting signals that are larger than 10(-8) (rad/s)/√Hz, thus approaching ring laser gyroscopes without using a narrow-linewidth laser or sophisticated optics. The ...

We demonstrate highly efficient diode-pumped single-frequency fiber laser with 35% slope efficiency and 50mW output power operating near 2μm, which generated from a 2-cm long piece of highly Tm-doped germanate glass fiber pumped at 800nm. ©2007 Optical Society of America OCIS code: (060.2320) Fiber optics amplifiers and oscillators; (140.3570) Lasers, single-mode; (140.5680) Rare earth and tran...

We have fabricated small core polysilicon waveguides by tapering bulk, as-drawn silicon optical fibers. The taper process acts to improve the local crystallinity of the core, resulting in a significant reduction in the material loss. OCIS codes: (060.2280) Fiber design and fabrication; (060.2290) Fiber materials; (060.4370) Nonlinear optics, fibers; (060.6000) Semiconductor Materials.

Advanced optical pulse coding methods to enhance the performance of distributed optical fiber sensors are reviewed. In particular, the latest implementations dedicated to highperformance long-range Raman and Brillouin based distributed sensing are described. OCIS codes: (060.2370) Fiber optics sensors; (290.5830) Scattering, Brillouin; (290.5860) Scattering, Raman.

A metamaterial integration for fiber optics, leading to a dual effect of surface plasmon and classical waveguiding, is presented along with experimental potentiality. We theoretically propose a metamaterial fiber in which, depending on the wavelength (from ultraviolet to infrared) and the particular metamaterial composition, one can transmit information through surface plasmon mediated or class...

Due to the long interactive length that light has with the glass media of an optical fiber there tend to be nonlinear optical effects. With the advent of microstructure fibers it is possible to tailor the fiber to reduce or enhance the nonlinear effect of light propagating down a fiber. This paper will give an overview on microstructure fibers and how they are used in nonlinear optics application.

A mode-locked Raman laser, using 25 m of a GeO2 doped fiber as the gain medium, is reported employing carbon nanotubes. The oscillator generates 850 ps chirped pulses, which are externally compressed to 185 ps. OCIS codes: (060.2310) Fiber optics; (140.3550) Lasers, Raman

We consider the communication channel given by a fiber optical transmission line. We develop a method to perturbatively calculate the information capacity of a nonlinear channel, given the corresponding evolution equation. Using this technique, we compute the decrease of the channel capacity to the leading order in the perturbative parameter for fiber optics communication systems.

A novel single frequency fiber laser with more than 100 mW output is presented. Low noise and a coherence length of >75 km make this laser extremely useful in sensing, LIDAR, and coherent communication applications. @2003 Optical Society of America OCIS codes: (060.2320) Fiber optics amplifiers and oscillators; (140.3570) Lao;ers. single-mode; (140.5680) Rare earth and transition metal solid-st...