20 GHz astronomical laser frequency comb with super-broadband spectral coverage

Yuanjie Wu; Zinan Huang; Tilo Steinmetz; Mark Yeo; Klaus Stockwald; Ronald Holzwarth

doi:10.1117/12.2624078

29 August 2022 20 GHz astronomical laser frequency comb with super-broadband spectral coverage

Yuanjie Wu, Zinan Huang, Tilo Steinmetz, Mark Yeo, Klaus Stockwald, Ronald Holzwarth

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121841J (2022) https://doi.org/10.1117/12.2624078
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

e report a latest generation of the laser frequency comb (LFC) for astronomy. The new features include all fiber coupled, alignment-free filter cavities; specially designed photonic crystal fiber for spectral broadening; reflective spectral flattening systems. All the features ensure the long-term stability of the whole LFC system. The LFC is designed to operate in two modes. The visible mode generates a supercontinuum from 445 nm to 870 nm, that covers 100 % spectral range of the Keck Planet Finder (KPF) spectrograph. The near-infrared mode offers a flat-top supercontinuum from 915 nm to 1450 nm, is prepared as a calibration source of the short-wavelength part of a near infrared (NIR) spectrograph

Conference Presentation

Citation Download Citation

Yuanjie Wu, Zinan Huang, Tilo Steinmetz, Mark Yeo, Klaus Stockwald, and Ronald Holzwarth "20 GHz astronomical laser frequency comb with super-broadband spectral coverage", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121841J (29 August 2022); https://doi.org/10.1117/12.2624078

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