Spectral shaping of ring resonator transmission response.

Mukesh Yadav,Jong Wook Noh,Astrid Aksnes,Dag Roar Hjelme

doi:10.1364/oe.415683

Mukesh Yadav, Jong Wook Noh + Show 2 more

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https://doi.org/10.1364/oe.415683

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Abstract

We present a Mach-Zehnder interferometer assisted ring resonator configuration (MARC) to realize resonator transmission spectra with unique spectral signatures and significantly large effective free spectral ranges. Transmission spectra with unique spectral signatures are generated by changing the angular separation between the through port and the drop port waveguides of the ring resonator (RR). These spectral signatures are comprised of several distinct resonance lineshapes including Lorentzian, inverse Lorentzian and asymmetric Fano-like shapes. One of the spectral signatures generated from the MARC device is utilized for the temperature sensing measurement to demonstrate a MARC-based sensor with high Q-factor and wide measurement range.

Highlights

Silicon ring resonator based optical devices are widely utilized for various applications such as optical filters [1,2], modulators [3], and sensors [4,5,6,7,8]
The aim of this study is to investigate the effect of an arbitrary angular separation, θ, between the through and the drop port waveguides on the Mach-Zehnder interferometer assisted ring resonator configuration (MARC) intensity response
We have proposed and experimentally demonstrated the Mach-Zehnder interferometer assisted ring resonator configuration (MARC), which generates transmission spectra with unique spectral signatures and significantly large effective free spectral ranges

Summary

Introduction

Silicon ring resonator based optical devices are widely utilized for various applications such as optical filters [1,2], modulators [3], and sensors [4,5,6,7,8]. This can be mainly attributed to the combination of high index contrast platform and the availability of complementary metal–oxide–semiconductor (CMOS) fabrication technology [9]. The bus waveguide evanescently couples light into the closed loop waveguide. A resonance lineshape of optical resonators is generally symmetric Lorentzian, and its linewidth determines the performances of RR-based filters and sensors

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