I was kind of expecting the first paragraph of this paper to explain first and foremost how they solved the switching problem (i.e. a transistor) using optical only components.
After wading through the paper for 10mn, I still haven't found the answer. If someone spotted it, please point where they talk about it, I would be grateful.
Or I could go ask an AI to find the answer for me I guess.
The almost canonical way of performing all-optical switching and logic is to use semiconductor optical amplifiers (SOA) and exploit their cross-gain modulation (XGM) or cross-phase modulation (XPM) capabilities[21]. With very reliable devices having been shown over the past 20 years[22], SOAs have proven useful for various types of all-optical operation, including decoder logic[23, 24] and signal regeneration[25, 26, 27]. The recovery time of the SOA limits its performance, but it has been shown that more than 320 Gbit/s[28]all-optical switching is possible, with some implementations enabling even the Tbit/s domain[29].
After wading through the paper for 10mn, I still haven't found the answer. If someone spotted it, please point where they talk about it, I would be grateful.
Or I could go ask an AI to find the answer for me I guess.