1 GHz electro-optical silicon-germanium modulator in the 5-9 µm wavelength range

Author:

Nguyen Thi Hao Nhi,Koompai Natnicha,Turpaud Victor,Montesinos-Ballester Miguel1,Peltier Jonathan,Frigerio Jacopo2ORCID,Ballabio Andrea2,Giani Raffaele2,Coudevylle Jean- René,Villebasse Cédric,Bouville David,Alonso-Ramos Carlos,Vivien Laurent,Isella Giovanni2,Marris-Morini DelphineORCID

Affiliation:

1. Institute for Quantum Electronics

2. L-NESS, Dipartimento di Fisica

Abstract

Spectroscopy in the mid-infrared (mid-IR) wavelength range is a key technique to detect and identify chemical and biological substances. In this context, the development of integrated optics systems paves the way for the realization of compact and cost-effective sensing systems. Among the required devices, an integrated electro-optical modulator (EOM) is a key element for advanced sensing circuits exploiting dual comb spectroscopy. In this paper, we have experimentally demonstrated an integrated EOM operating in a wide wavelength range, i.e. from 5 to 9 µm at radio frequency (RF) as high as 1 GHz. The modulator exploits the variation of free carrier absorption in a Schottky diode embedded in a graded silicon germanium (SiGe) photonic waveguide.

Funder

Renatech

Fondazione Cariplo

Agence Nationale de la Recherche

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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