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Optical Engineering

Modeling of a high-performance multimode interference optical switch using reconfigurable image modulated region
Author(s): Ghanshyam K. Singh; Vijay Janyani; Rajendra Prasad Yadav
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Paper Abstract

Modeling and detailed performance analysis is carried out to realize a multimode interferometer optical switch by inserting an appropriate image-modulated (IM) region. The concept of self-imaging characteristics of multimode waveguides has been utilized in order to drive the designed device as a photonic 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. It has been observed that by inserting an additional IM region, switching losses and corresponding crosstalk levels can be reduced significantly. The device performance is checked for a wider range of index variation in the IM region with respect to other regions for a test wavelengh of 1.55 µm. With rigorous and repetitive simulation, a crosstalk level better than -22.2 dB for either case of polarization state (transverse electric and transverse magnetic) of input has been achieved. The design also possesses a design tolerance in the range of ±0.25 to ±0.5 μm, within which variation in the imaging length and its subsequent adverse effects on device performance remains less than 1.5%.

Paper Details

Date Published: 18 July 2012
PDF: 6 pages
Opt. Eng. 51(7) 074006 doi: 10.1117/1.OE.51.7.074006
Published in: Optical Engineering Volume 51, Issue 7
Show Author Affiliations
Ghanshyam K. Singh, Malaviya National Institute of Technology (India)
Vijay Janyani, Malaviya National Institute of Technology (India)
Rajendra Prasad Yadav, Malaviya National Institute of Technology (India)

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