Design of photonic crystal based compact all-optical 2 × 1 multiplexer for optical processing devices. (June 2021)

• Record Type: Journal Article
• Authors: Rao, Dalai Gowri Sankar; Swarnakar, Sandip; Kumar, Santosh
• Is Part Of: Microelectronics journal. Volume 112(2021)
• Publication Date: 2021-06
• Subjects: All-optical MUX -- Photonic crystals -- Beam-interference -- FDTD method -- Contrast ratio; Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2021.105046
• Languages: English
• ISSNs: 0959-8324

Abstract

Abstract: Through this work, an all-optical 2 ​× ​1 multiplexer (MUX) is realized for optical networking and optical signal processing using two-dimensional photonic crystal waveguides. The structure consists of two T-shaped and one Y-shaped waveguide using square lattice silicon rods with a background of air. The all-optical MUX is designed without using any nonlinear material like Kerr material to overcome the problems of low gain and nonlinear susceptibility. This design works on the principle of beam-interference phenomena. The performance all-optical MUX is simulated with the help of the finite-difference-time-domain method and resultant outputs are verified using the distribution of the optical field at a wavelength of 1.55 ​μm. The proposed circuit occupies less area 7.8 ​μm ​× ​9 ​μm and provides a transmission ratio of more than 92%, a contrast ratio of 29.66 ​dB in presence of select input and 23.2 ​dB in absence of select input and it can operate with a bit rate of 1.56 Tbps.