Mid-infrared waveguides for broadband single-moded guidance

Callum J. Stirling; April Logan; Wei Cao; Jamie D. Reynolds; Zhibo Qu; Thomas D. Bradley; Lorenzo Mastronardi; Frederic Y. Gardes; Goran Z. Mashanovich; Milos Nedeljkovic

doi:10.1117/12.2665590

31 May 2023 Mid-infrared waveguides for broadband single-moded guidance

Callum J. Stirling, April Logan, Wei Cao, Jamie D. Reynolds, Zhibo Qu, Thomas D. Bradley, Lorenzo Mastronardi, Frederic Y. Gardes, Goran Z. Mashanovich, Milos Nedeljkovic

Author Affiliations +

Proceedings Volume 12575, Integrated Optics: Design, Devices, Systems and Applications VII; 1257503 (2023) https://doi.org/10.1117/12.2665590
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

We present the development of SOI waveguides with low-loss (~1.5 dB/cm) single-moded guidance over an octave of frequency. Broadband single-moded guidance is needed for on-chip mid-infrared spectroscopy and this cannot be provided by conventional waveguide geometries in standard material platforms. The reported waveguides require a simple fabrication process flow and will be widely applicable to different mid-infrared wavelength bands for a variety of sensing applications. We further present a low-loss bend design (0.179 ± 0.031 dB/90°) that overcomes the inherently large bending loss of the waveguides, which is a limiting factor in the utility of the waveguides. We consider different prospective designs for the use of these waveguides in a circuit for a sensing device.

Conference Presentation

Citation Download Citation

Callum J. Stirling, April Logan, Wei Cao, Jamie D. Reynolds, Zhibo Qu, Thomas D. Bradley, Lorenzo Mastronardi, Frederic Y. Gardes, Goran Z. Mashanovich, and Milos Nedeljkovic "Mid-infrared waveguides for broadband single-moded guidance", Proc. SPIE 12575, Integrated Optics: Design, Devices, Systems and Applications VII, 1257503 (31 May 2023); https://doi.org/10.1117/12.2665590

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