Performance Enhancement of a 2 × 2 Multimode Interference Photonic Switch using Size-modulated Index Regions

Abstract

In this work, modeling with detailed performance analysis is carried out to explain working of a multimode interferometer photonic switch using size-modulated index regions in its coupling section. Concept of self-imaging characteristics of multimode waveguides has been utilized in order to drive the switch. Transition losses in the waveguides of the structure are maintained at low levels by selecting appropriate dimensions to increase overall performance of the switch for popular optical test wavelengths (1.3 and 1.55 mm). With repetitive simulation and required calculations, for either case of polarization, a crosstalk level better than −34 dB for cross state and −24 dB for bar state has been achieved. Meanwhile, the switch possesses insertion loss and excess loss levels less than 0.8 and 0.7 dB, respectively, in either case of operating wavelength with vacillation of the worse case polarization-dependent loss of 0.3 dB. The computed results for its performance are better when compared to the present published data.

Keywords:

• Crosstalk
• Excess loss
• Index modulation
• Insertion loss
• Multimode interference structure

Additional information

Notes on contributors

Ghanshyam Singh

Ghanshyam Singh is an Assistant Professor in the Department of Electronics and Communication Engineering (ECE) at MNIT, Jaipur, India. He obtained his Bachelor’s degree in ECE from National Institute of Technology Silchar, Assam (then REC Silchar), and M. Tech. and PhD degrees in ECE from MNIT. He had worked with optics group at Department of Physics, Herriot Watt University, Edinburgh, UK, under the research grant from TEQIP, Government of India (March 2009). He has also been a recipient of CIMO fellowship from the Government of Finland to pursue a research work with photonics groups at Nanofabrication Laboratory, Department of Physics and Mathematics, University of Eastern Finland, Joensuu, Finland for a 6-month period (from 1 January to 30 June, 2010). He is a member of IEEE Photonic Society, SPIE, Optical Society of America (OSA), and fellow member of IETE and Optical Society of India. His research areas include optical communication, optical switches, optical digital logics, and interconnects. E-mail: [email protected]

Ashok Sirohil

Ashok Sirohi is an Associate Professor with Department of Electronics and Communication Engineering, RCEW, Jaipur. Currently, he is pursuing PhD from Department of Physical Sciences, Banasthali University, Dist. Tonk, Rajasthan. He had completed M.Tech. in ECE from MNIT, Jaipur in the year 2005. His research areas include optical switches based on multimode interference and photonic bandgap waveguides. E-mail: [email protected]

Seema Verma

Seema Verma obtained her Master's and PhD degrees in Electronics from Banasthali University in 1999 and 2003, respectively. She is currently working as an Associate Professor of Electronics, Department of Aviation Sciences at Banasthali University. She is a fellow of IETE, life member of Indian Science Congress, and life member of IAENG. She is an active research supervisor and four PhDs have been awarded under her guidance. She has many projects from UGC (under R and D Major Research Project Scheme, UGC Innovative Course Scheme) and AICTE to her credit. She is currently into the editorial board of many international journals in the field of wireless communication and coding. Her research areas of interest are coding theory, TURBO codes, wireless sensor networks, aircraft ad-hoc networks, network security, and VLSI design. E-mail: [email protected]