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Low-Power All-Optical Switch Based on Time-Reversed Microring Laser

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1 Author(s)
Mock, A. ; Sch. of Eng. & Technol., Central Michigan Univ., Mount Pleasant, MI, USA

An all-optical switch based on an absorbing microring resonator laterally coupled to two waveguides is described theoretically using the coupling of modes in time formalism and numerically using the finite-difference time-domain method. The operating principle of the device is based on the recently published time-reversed laser concept. The proposed switch relies on a combination of coherent interference and absorption in the microring and does not require nonlinear refractive index changes. It has a smaller footprint than other approaches, and it is capable of converting frequency- or phase-shift-keyed digital signals to amplitude-shift-keyed signals for direct detection.

Published in:

Photonics Journal, IEEE  (Volume:4 ,  Issue: 6 )