Temperature’s effect on the performance of semiconductor optical amplifiers (SOAs) is an important research topic. Amer Kotb and colleagues from the Chinese Academy of Sciences’ Changchun Institute of Optics, Fine Mechanics, and Physics investigated the effect of high temperatures on the performance of various SOAs at different speeds, including conventional SOAs, carrier reservoir (CR)-SOAs, reflective SOAs (RSOAs), and photonic crystal (PC)-SOAs.
The findings were published in the Journal of Modern Optics.
Despite the benefits of traditional bulk SOA, it has a slow dynamic response, which affects its performance at high speeds. As a result, Amer Kotb and his research team were tasked with locating suitable alternatives.
Because of its inherent faster gain and phase response, CR-SOA overcomes the response limitation of standard SOA, allowing the execution of all-optical logic operations at a higher data rate of up to 120 Gb/s.
Because of its construction, RSOA offers more advantages than a standard SOA, such as higher optical gain and lower noise figure at low injection currents with energy-efficient operation.
Furthermore, incorporating PCs into a standard SOA improves dynamic response, making it suitable for ultra-high-speed all-optical operations of up to 160 Gb/s.
As a result, the researchers investigated the performance of all-optical exclusive-OR (XOR) logic gates at high operating temperatures using the above-mentioned schemes.
They solved the time-dependent differential equations for each amplifier and tested the performance of XOR operations at various temperatures. Furthermore, the effect of operating temperature on key amplifier operating parameters was discussed.
The results show that alternatives to conventional bulk SOAs can operate at high temperatures and achieve acceptable performance levels that standard SOAs cannot.