Optical mm-Wave Synthesizer Using Semiconductor Ring Laser (a Review)

Abstract

Millimeter wave (mm-wave) technology is signicant for military needs and applications due to its numerous advantages, such as huge bandwidth, deploying small antenna and high radar resolution. Due to atmospheric inuence, mm-wave is important in short-range applications such as re control radar. Similarly for the nextgeneration communication and military applications, high-speed radio over ber networks are very crucial. In this paper, a review of the generation and modulation of millimeter-wave signal optically using semiconductor ring laser (SRL) has been done. The phenomena of optical injection locking and four-wave mixing are exploited in SRL to generate radio frequency (RF) optical signals. The signals with huge data rate can be transferred directly from an intensity modulated optical signal onto a RF optical signal with RF frequency tunable in steps of the free spectrum range (FSR) of SRL. They can be converted with exible RF modulation formats over the optical carrier.

Design and analysis of broadband antipodal Vivaldi antenna for radio over fiber systems

“…The objectives of deployment of 5G by 2020, the scalability of optical access network (OAN) is required. Essentially, a photonics based mm‐wave is a laser beam consisting of two or more coherent longitudinal modes with frequency spacing equal to the wanted MMW . As the longitudinal modes beat with each other in the photodiode, the required electrical MMW could be generated.…”