Proposal for ultrafast all-optical pseudo random binary sequence generator using microring resonator-based switches

Microring resonator-based all-optical parallel pseudo random binary sequence generator for rate multiplication

“…A feedback path is formed through a 90:10 coupler from the MRR add port to maintain the previous output of the flip-flop when no clock signal is applied. An Erbium Doped Fiber Amplifier (EDFA) is used in this path to provide the necessary extra gain (Rakshit et al 2021).…”

“…4Δ, 3Δ, 2Δ, Δ, so that all DFFs work simultaneously. An EDFA is inserted at every input of the XOR gates to maintain the power of the signal at sufficient level, as the XOR input acts both as pseudopump and probe signal (Rakshit et al 2021).…”

“…In modern communication networks and systems, such information is carried in structured form by Pseudo Random Binary Sequences (PRBS), which are deterministic in nature, include all possible combinations of data up to a given length, have useful statistical properties, and can be generated in a straightforward and reproducible manner (MacWilliams and Sloane 1976). PRBS are also used in the optical domain, where different approaches have been adopted to generate them exclusively by means of light (Zoiros et al 2011;Ma et al 2009;Wu et al 2010;Rakshit et al 2021;Thapa et al 2019;Kouloumentas et al 2009), i.e. all-optically (AO), and employ them in applications with better performance and higher operating speed than the corresponding electronic, such as bit error rate testing (Zoiros et al 2004), binary pattern recognition (Webb et al 2009), error detection/correction (Aikawa et al 2011), parity generation and checking (Dimitriadou et al 2013), encryption/decryption (Zhang et al 2015) and optical code division multiple access (CDMA) (Glesk et al 2017).…”

Modelling of one-bit Arithmetic Logic Circuit using silicon micro-ring resonator

“…Otherwise, output will be logic '1'. The operation of all-optical silicon MRR based XOR gate is explicitly described in [17]. The configuration of XOR and AND gate using a single MRR has been shown in figure 3.…”

“…The optical coupler degrades the power of the input signal required for switching. This can be compensated by using an erbium-doped waveguide amplifier (EDWA) in the respective path [17]. This type of amplifier can provide the necessary extra gain, which is of the order of 13 dB.…”