"Photonics: Abbreviations and Acronyms: January, 2011" lists of more than four thousand and five hundred (4,500) abbreviation and acronyms together with their phrases (more than 5,400 phrases) relevant to photonics and its related disciplines such as optics, optoelectronics, electro-optics, detectors, lasers, imaging, fiber optics, spectroscopy, biospectroscopy, microscopy, nanoscopy, photovoltaics, microphotonics, nanophotonics, biophotonics, optomechatronics, optical engineering, etc. These abbreviations and acronyms were collected from various sources. This book is particularly intended for scholars as well as students in Optics and related fields.