Spectrum-flattened micro-resonator-based frequency comb for precision astronomical spectroscopy

Yuanjie Wu; Arne Kordts; Tilo Steinmetz; Karsten Winkler; Klaus Stockwald; Marc Fischer; Ronald Holzwarth

doi:10.1117/12.3016936

18 July 2024 Spectrum-flattened micro-resonator-based frequency comb for precision astronomical spectroscopy

Yuanjie Wu, Arne Kordts, Tilo Steinmetz, Karsten Winkler, Klaus Stockwald, Marc Fischer, Ronald Holzwarth

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 13096AC (2024) https://doi.org/10.1117/12.3016936
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

We present flattened supercontinuum generation from a micro-resonator-based frequency comb for the calibration of astronomical spectrographs. Micro-resonator-based frequency combs, also known as microcombs, exhibit inherently high mode spacing owing to their compact cavity size. Applying a tailored photonic crystal fiber (PCF) taper, the spectrum of a 12 GHz microcomb is broadened to more than one octave from 1.0 μm to 2.2 μm. The resulting supercontinuum is smoothed using a spatial light modulator based spectral flattener, producing a flat-top broadband supercontinuum that serves as a powerful source for precision astronomical spectroscopy.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yuanjie Wu, Arne Kordts, Tilo Steinmetz, Karsten Winkler, Klaus Stockwald, Marc Fischer, and Ronald Holzwarth "Spectrum-flattened micro-resonator-based frequency comb for precision astronomical spectroscopy", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 13096AC (18 July 2024); https://doi.org/10.1117/12.3016936

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