Effects of two-photon absorption on pseudo-random bit sequence operating at high speed. Issue 1 (2nd January 2019)

• Record Type: Journal Article
• Authors: Thapa, Sunil; Zhang, Xiang; Dutta, Niloy K.
• Is Part Of: Journal of modern optics. Volume 66:Issue 1(2019)
• Page Start: 100
• Page End: 108
• Publication Date: 2019-01-02
• Subjects: Two-photon absorption -- quantum-dot semiconductor optical amplifier -- pseudorandom bit sequence -- optical logic -- Q factor; Optics -- Periodicals; 535
• DOI: 10.1080/09500340.2018.1512671
• Languages: English
• ISSNs: 0950-0340

Abstract

ABSTRACT: The effect of two-photon absorption (TPA) on all-optical logic operation in quantum-dot semiconductor optical amplifier (QD-SOA) has been carried out. We model the rate equation with the TPA effect for the logic XOR gate, AND gate, and, for pseudo-random bit sequence (PRBS) generation. The simulated results indicate that the TPA induced pumping increases the output Q-factor (quality). The results show that the quality of the output depends on the input pulse width and the speed of operation. The PRBS system can operate at 250 and 320 Gb/s but an increase in pulse width decreases the output Q-factor.