Phase-Disturbing Speckle-Suppressing by Contact Fiber Scrambler

To measure the focal ratio degradation of astronomical fibers, we use laser as the light source which can do with bringing the light to a focal point and we can control the injection position. The laser has a high coherency and there are a number of modes in the large-core fiber. Consequently, the output spot will be a speckle. The presence of speckle makes… CONTINUE READING