Tunable fibre Bragg grating arrays for spectral cross-correlation

Polina Zavyalova; Suresh Sivanandam; Peter R Herman; Ehsan Alimohammadian; Abdullah Rahnama

doi:10.1117/12.2630688

29 August 2022 Tunable fibre Bragg grating arrays for spectral cross-correlation

Polina Zavyalova, Suresh Sivanandam, Peter R Herman, Ehsan Alimohammadian, Abdullah Rahnama

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 1218458 (2022) https://doi.org/10.1117/12.2630688
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

Miniaturization of astronomical instruments for high-resolution cross-correlation spectroscopy for exoplanet analysis may be achieved using existing photonic platforms and technologies. Arrays of fibre Bragg gratings (FBGs) may be inscribed into optical fibre to form a target-tailored instrument spectrum offering flexible modulation during instrument operation. This paper presents example spectra of the first such instrument designed for astronomical spectroscopy, fabricated by point-by-point writing with a femtosecond laser in the core of a single-mode telecommunication fibre. First results of spectral modulation and cross-correlation analysis are presented for a strain-modulated FBG array based on infrared molecular gas absorption.

Citation Download Citation

Polina Zavyalova, Suresh Sivanandam, Peter R Herman, Ehsan Alimohammadian, and Abdullah Rahnama "Tunable fibre Bragg grating arrays for spectral cross-correlation", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 1218458 (29 August 2022); https://doi.org/10.1117/12.2630688

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