Design and Analysis of Waveguide Taper for Photonic Crystal Demultiplexer
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ORIGINAL PAPER
Design and Analysis of Waveguide Taper for Photonic Crystal Demultiplexer Venkatachalam Rajarajan Balaji 1
&
Mahalingam Murugan 2 & Savarimuthu Robinson 3 & Gopalkrishna Hegde 4
Received: 26 May 2020 / Accepted: 28 August 2020 # Springer Nature B.V. 2020
Abstract The Photonic Crystal (PC) taper integrated between Single Mode Fiber (SMF) and photonic device for optimum power coupling for different waveguide lengths (8 μm and 0.99 μm) is designed and analyzed. Different geometries of the taper such as triangular, rectangular and Butt coupler are considered for investigation. The transmission efficiencies of different waveguides based on the taper length (TL), waveguide starting (WS), waveguide ending (WE), and inlet waveguide width (WI) geometry are investigated. Triangular taper design couples the strong electric field which provides higher transmission efficiency of around >90%, spectral wavelength of a 0.2 nm, channel spacing of 0.4 nm, and crosstalk of −53 dB. Keywords Photonic crystal . Demultiplexer . Taper . Transmission efficiency . Waveguide
1 Introduction The Fiber Optic Communication system transmits the information with less attenuation for longer distance in comparison with Radio Frequency (RF) communication system. The network becomes more complicated for each user link with individual fiber to the network when users are increasing. The
* Venkatachalam Rajarajan Balaji [email protected] Mahalingam Murugan [email protected] Savarimuthu Robinson [email protected] Gopalkrishna Hegde [email protected] 1
School of Electronics Engineering, Vellore Institute of Technology, Vandalur Kelambakkam Road, Chennai, Tamil Nadu 600 127, India
2
Department of Electronics and Communication Engineering, SRM Valliammai Engineering College, Kattankulathur, Tamil Nadu 603203, India
3
Department of Electronics and Communication Engineering, Mount Zion College of Engineering and Technology, Pudukkottai, Tamil Nadu 622 507, India
4
Centre for Nanoscience and Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India
network becomes simpler and less expensive when it is routed through SMF for a large number of users. Wavelength Division multiplexing (WDM) Technology is used with SMF to send a number of unique light waves through same SMF [1]. At the receiver’s end, the transmitted light from SMF is subsequently split into individual user through the device, demultiplexer. The existing demultiplexers either use the Grating Prism [2] or Tunable detector [3], and Micromirrors [4] to separate the wavelengths. However, these suffer radiation loss and large footprint size in mm. The drawback of existing technology is being addressed with the use of PC based devices. Photonic Crystals are fabricated periodic nanostructures with ability to control and manipulate the flow of electromagnetic waves within nanometer scale and tight bending corners based on photonic band gap (PBG). The PC structures generated more interest due to minimum absorption loss, nonlinear effe
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