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In this paper, various types of non-destructive inspection techniques have been discussed. We also experimentally investigate the usage of optical sensors as a non-destructive approach towards tube boiler inspection. The experiment has been carried out onto a carbon steel U-tube with sensors being installed at critical positions of the tubes. It was observed that different thicknesses along the curved...
A flexible, streamline and lightweight optical fibre connector-less interface composed of composite materials has been developed. Light is coupled in and out of the interface via a fibre launch system. A fibre Bragg grating (FBG) is embedded into the composite structure in order to investigate the optical performance of the interface. It is shown that an optical connection is maintained between the...
In this report, we carry out simulation and experimental investigations of directional coupler structures with different separations between the glycerin selectively infiltrated channel and silica core of a large mode area Photonic Crystal Fiber (PCF). We assess their coupling characteristics and the corresponding temperature sensing capabilities. The temperature sensitivities of the glycerin selectively...
A review of photonic crystal fiber sensors with microbubble is presented. The work concentrate in three sensing fields: the first reports on temperature sensing; the second describes on strain sensing; the last part focuses on refractive index sensing and bio-sensing. The method of fabricating the microbubble is also briefly discussed.
A low insertion loss and compact all-fiber short carbon nanotube based saturable absorber (SA) is presented. By connecting the SA in a linear cavity Erbium-doped Fiber Laser, passively Q-switched EDFL with high pulse-repetition-rate is achieved.
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