https://doi.org/10.1140/epjp/s13360-023-04204-w
Regular Article
Full spectral coverage generation for calibration of astronomical telescope spectrographs
School of Physical Science and Technology, Southwest Jiaotong University, 611756, Chengdu, China
Received:
17
January
2023
Accepted:
17
June
2023
Published online:
26
June
2023
Calibrating astronomical telescopes necessitates a broadband spectrum that extends into the mid-infrared region, as well as pulse energy that attains magnitudes of tens of μJ while maintaining a stabilized carrier-envelope phase. To address these challenges simultaneously, we introduce a novel and uncomplicated experimental setup that utilizes a specifically oriented type-I bismuth borate crystal. This cost-effective architecture generates pulses that span from 450 to 3000 nm through the combined use of intra-pulse difference frequency generation and optical parametric amplification. The octave-spanning pulses were automatically carrier-envelope phase-stabilized due to self-cancellation of carrier-envelope phase fluctuation. The idler pulse energy achieved was up to 30 μJ without extra amplification stages. By means of our theoretical simulation, this approach exhibits the potential to broaden the spectrum up to 5 μm.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
