write summary of guest lecture by Dr. Shivangi Chugh in one paragrapgh in simple english - topics covered brief history of fibre optics , optical fiber, electromagnetic spectrum, wavelength for optical transmission, optical communication system, intensity modulated fibre optic links, spectral efficiency, coherent technology, modulation formats, coherent detection,

Dr. Shivangi Chugh delivered an enlightening guest lecture on the subject of fibre optics. She began with a brief history of fibre optics, tracing its development and evolution over time. She then moved on to discuss the specifics of optical fiber, including its composition and function. Dr. Chugh also explained the electromagnetic spectrum and the specific wavelengths used for optical transmission. The lecture then delved into the intricacies of the optical communication system, including the use of intensity modulated fibre optic links. She also touched on the topic of spectral efficiency and its importance in this field. The latter part of the lecture was dedicated to coherent technology, modulation formats, and coherent detection, providing a comprehensive overview of these complex topics.

Dr. Shivangi Chugh delivered an enlightening guest lecture on the subject of fibre optics. She began with a brief history of fibre optics, tracing its development and evolution over time. She then moved on to discuss the specifics of optical fiber, including its composition and function. Dr. Chugh also explained the electromagnetic spectrum and the specific wavelengths used for optical transmission. The lecture then delved into the intricacies of the optical communication system, including the use of intensity modulated fibre optic links. She also touched on the topic of spectral efficiency and the importance of maximizing it in optical communication. The lecture concluded with an in-depth discussion on coherent technology, modulation formats, and coherent detection, providing a comprehensive overview of the current state of fibre optics technology.