Doppler optical frequency domain reflectometry for remote fiber sensing

Coherent optical frequency domain reflectometry has been widely used to locate static reflectors with high spatial resolution. Here, we present a new type of Doppler optical frequency domain reflectometry that offers simultaneous measurement of the position and speed of moving objects. The system is exploited to track optically levitated "flying" particles inside a hollow-core photonic crystal fiber. As an example, we demonstrate distributed temperature sensing with sub-mm-scale spatial resolution and a standard deviation of similar to 10 degrees C up to 200 degrees C. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreemen

PROXIMATE FOOD COMPOSITION ON LARVAL DURATION, MORTALITY, SURVIVAL, GROWTH AND FECUNDITY OF PERICALLIA RICINI (FAB.)

Influence of dietary protein on larval duration, mortality, survival, growth and fecundity of Pericallia ricini was studied by using artificial diet with foul different levels of protein viz. 12, 17, 22 and 26%. The survival, mortality, larval duration and growth of test insect were depended on the amount of protein in the diet. Maximum fecundity was observed (619 eggs) in the optimum level protein (22%) fed groups, while it was minimum (362 eggs) in the low protein diet (17%) fed individuals