Phys.org October 30, 2024
Conventional optical amplifiers that use stimulated emission suffer from the generation of excess noise, thus limiting the performance in many applications. The phase-sensitive optical parametric amplifier can approach a noise figure of 0 dB. However, its implementation in optical communication links is cumbersome due to increased complexity. An international team of researchers (Sweden, Sri Lanka) proposed and demonstrated an implementation of a transmission system using a standalone ultralow-noise phase-sensitively preamplified receiver and a conventional single-wave optical transmitter. According to the researchers their approach was simple and could transform amplifiers to practical use, such as deep-space-to-earth communication links… read more. Open Access TECHNICAL ARTICLE
Evolution of FWM-based amplification for a dual-pump… Credit: Ultralow-noise preamplified optical receiver using conventional single-wavelength transmission