The optical fibre technology extensively benefits applications dealing with lighting, sensing and communication systems. Many enhancements have been made in the past years to reduce the fibre attenuation and to improve the fibre performance. These days, new applications have been developed over the scientific community. After several decades of commercial use, new optical fiber types are in development to improve some aspect of communications. Improvements in fiber have come in the forms of providing higher bandwidth, supporting longer distances or in conjunction with the optoelectronic devices at both ends -- reducing the overall cost of transport. One such development in the LAN fiber world is the development of wide band multimode fiber (WBMMF). This new fiber type expands the range of usable wavelengths from one to several, and enables the use of shortwave wavelength-division multiplexing in the range from 850 to 950 nanometers. Optical Fiber New Developments is a compilation of works presenting recent advances and progress in optical fiber technology related to the next generation optical communication, system and network, sensor, laser, measurement, characterisation and devices. Innovations in optical fiber technology are revolutionising world communications. Newly developed fibre amplifiers allow for direct transmission of highspeed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-todate reviews. This book should be of immense valuable tool for researchers and practitioners working in academic institutions as well as industries.