Mr. Daniel Dousek Profile

Daniel Dousek

at Czech Technical Univ in Prague

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Publications (3)

Proceedings Article | 15 March 2023 Presentation + Paper

Direct and low-loss connection between a hollow-core optical fiber and a dispersion compensating fiber for dispersion-free delivery of short optical pulses in hollow-core fiber

Ailing Zhong, Radan Slavík, Daniel Dousek, Dmytro Suslov, Stanislav Zvánovec, Francesco Poletti, David Richardson, Matĕj Komanec

Proceedings Volume 12414, 1241404 (2023) https://doi.org/10.1117/12.2648720

KEYWORDS: Dispersion, Ultrafast phenomena, GRIN lenses, Single mode fibers, Pulse signals, Antireflective coatings, Optical fibers, Femtosecond pulse shaping, Design and modelling

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Proceedings Article | 25 May 2022 Presentation

Advances in hollow-core to standard fiber interconnection technology

Matěj Komanec, Dmytro Suslov, Ailing Zhong, Daniel Dousek, Stanislav Zvánovec, Eric Numkam Fokoua, Francesco Poletti, David Richardson, Radan Slavík

Proceedings Volume PC12140, PC1214001 (2022) https://doi.org/10.1117/12.2624102

KEYWORDS: Standards development, Signal attenuation, Single mode fibers, Micro optics, Telecommunications, Optical isolators, Optical filters, Multiplexers, Molecular bridges, Fusion splicing

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The attenuation of hollow-core fibers (HCFs) is predicted to surpass the minimum intrinsic attenuation of standard single-mode fibers (SMFs) in the near future. Recent advances in HCF performance and drawing technology have motivated their application not only in telecommunications but also in sensing and high-power delivery. Among HCFs, nested antiresonant nodeless fibers (NANFs) have shown the lowest attenuation values with 0.28 dB/km at 1550 nm and 0.22 dB/km at 1625 nm. Furthermore, the latest generation of NANFs effectively mitigates higher-order modes, which in some applications introduces a significantly limiting factor. As HCFs are becoming more available, their incorporation into standard SMF-based systems needs to be efficiently addressed. Various solutions to the HCF-SMF interconnection have already been proposed, such as the commonly employed fusion splicing with bridge fibers, using tapers to match the mode-fields, employing micro-optics, or using the fiber-array approach. Based on the fiber-array approach we have recently demonstrated losses of only 0.16 dB per interconnection and back reflection below -60 dB. But what if the interconnection itself can provide some additional functionality beyond low loss and low back reflection? Such an approach was already proposed in the micro-optics interconnection providing a function as an optical isolator or a wavelength-division multiplexer. Still, the relatively high complexity of such a device might limit its wider application. In this talk, I will overview current trends in HCF-SMF interconnection techniques which are enabling their incorporation into current SMF-based fiber-optic systems. I will present a future outlook of providing additional functionality to the HCF-SMF interconnection. I will focus on an interconnection technique we developed, based on the fiber-array approach. I will show how components such as an optical filter, a gas cell, or a Fabry-Perot cavity can be easily formed by simple tailoring of the HCF-SMF interconnection.

Proceedings Article | 18 April 2021 Poster + Presentation + Paper

Long-term stability of hollow core to standard optical fiber interconnection

Daniel Dousek, Matěj Komanec, Ailing Zhong, Dmytro Suslov, Stanislav Zvánovec, Petr Veselý, Yong Chen, Thomas Bradley, Eric Numkam Fokoua, Francesco Poletti, David Richardson, Radan Slavík

Proceedings Volume 11773, 117731B (2021) https://doi.org/10.1117/12.2592377

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