Dr. Andres Forrer Profile

Dr. Andres Forrer

at ETH Zurich

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 13 March 2024 Presentation

Presentation

Fast rotational mid-IR spectroscopy with broadband quantum cascade lasers

Alessio Cargioli, Diego Piciocchi, Mathieu Bertrand, Sergej Markmann, Martin Franckié, Mehran Shahmohammadi, Andres Forrer, Pierre Jouy, Richard Maulini, Stéphane Blaser, Tobias Gresch, Antoine Muller, Mattias Beck, Jerome Faist, Giacomo Scalari

Proceedings Volume PC12905, PC1290507 (2024) https://doi.org/10.1117/12.2692636

KEYWORDS: Quantum cascade lasers, Spectroscopy, Mid-IR, FT-IR spectroscopy, Modulation, Spectrometers, Quantum noise, Quantum interference, Quantum amplitude, Process control

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Proceedings Article | 17 March 2023 Presentation

Presentation

Temporal properties od THz frequency combs quantum cascade lasers in ridge and ring resonators

Giacomo Scalari, Paolo Micheletti, Urban Senica, Andres Forrer, Sara Cibella, Guido Torrioli, Mattias Beck, Jerome Faist

Proceedings Volume PC12406, PC1240607 (2023) https://doi.org/10.1117/12.2659147

KEYWORDS: Terahertz radiation, Resonators, Quantum cascade lasers, Frequency combs, Frequency modulation, Fermium, Dispersion, Waveguides, Spectroscopes, Solitons

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Proceedings Article | 17 March 2023 Presentation

Presentation

Frequency comb operation of antenna coupled terahertz quantum cascade ring lasers

Paolo Micheletti, Urban Senica, Andres Forrer, Sara Cibella, Guido Torrioli, Mattias Beck, Jérôme Faist, Giacomo Scalari

Proceedings Volume PC12430, PC1243009 (2023) https://doi.org/10.1117/12.2649928

KEYWORDS: Quantum cascade lasers, Antennas, Frequency combs, Phase measurement, Waveguides, Solitons, Dispersion

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Proceedings Article | 17 March 2023 Presentation

Presentation

Planarized THz quantum cascade lasers for broadband coherent photonics

Giacomo Scalari, Urban Senica, Paolo Micheletti, Andres Forrer, Sara Cibella, Guido Torrioli, Martin Franckié, Mattias Beck, Jérôme Faist

Proceedings Volume PC12440, PC124400P (2023) https://doi.org/10.1117/12.2648793

KEYWORDS: Terahertz radiation, Quantum cascade lasers, Photonics, Waveguides, Dispersion, Polymers, Polymer multimode waveguides, Planar waveguides, Picosecond phenomena, Passive elements

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Proceedings Article | 13 March 2023 Presentation

Presentation

THz optical beatnote detection with a fast hot electron bolometer operating up to 31 GHz

Sara Cibella, Andres Forrer, Mattias Beck, Pasquale Carelli, Fabio Chiarello, Jérôme Faist, Alessandro Gaggero, Ennio Giovine, Francesco Martini, Urban Senica, Roberto Leoni, Giacomo Scalari

Proceedings Volume PC12420, PC124200D (2023) https://doi.org/10.1117/12.2649970

KEYWORDS: Terahertz radiation, Bolometers, Sensors, Radio optics, Frequency combs, Ultrafast phenomena, Telescopes, Superconductors, Radio astronomy, Quantum cascade lasers

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Proceedings Article | 3 June 2022 Presentation

Presentation

Planarized tapered waveguides for THz quantum cascade laser frequency combs

Urban Senica, Tudor Olariu, Andres Forrer, Paolo Micheletti, Mattias Beck, Jérôme Faist, Giacomo Scalari

Proceedings Volume PC12134, PC1213406 (2022) https://doi.org/10.1117/12.2626797

KEYWORDS: Waveguides, Terahertz radiation, Frequency combs, Quantum cascade lasers, Temperature metrology, Wave propagation, Standards development, Signal attenuation, Scattering, Polymers

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Terahertz (THz) quantum cascade lasers (QCLs) based on double metal waveguides are compact sources of broadband THz radiation, which can also operate as frequency combs. We present a planarized double metal waveguide THz QCL platform, where the active region is embedded in a low-loss BCB polymer and covered by an extended top metallization. The latter enables placing bonding wires on the sides above the BCB-covered area, hindering the formation of any defects on the active region and enables the fabrication of waveguides with narrow widths below the bonding wire size. This can then be employed as a fundamental mode selection mechanism for comb operation without any side absorbers, and also features improved heat dissipation properties in continuous wave operation. The extended top metallization also enhances the RF properties of the device, as it encompasses a metallic cavity with the global ground plane. Experimentally, we present results on two different device geometries. First is a simple ridge waveguide with a width of 40 μm, narrow enough to act as a mode selection filter. Free-running frequency comb states with bandwidths above 600 GHz and single beatnotes up to -60 dBm are measured. With a strong external RF signal, close to the natural repetition frequency, we can broaden the emission to over 1.4 THz. The second type of device is a tapered waveguide, where the narrow sections act as a transversal mode filter, while the wider ones have lower waveguide losses and provide more gain. Due to a field-enhancement effect in the narrow sections, there is a significant enhancement in the four wave mixing, a third order nonlinear process responsible for comb formation. Free-running devices produce beatnotes close to -30 dBm, three orders of magnitude higher than for ridge devices. Improved comb performance is maintained also for high operating temperatures. A comb bandwidth above 200 GHz and a single beatnote above -60 dBm are measured at 115 K, very close to the maximum lasing temperature of 118 K. Beyond the improved laser and comb performance, the planarized waveguide platform also enables a relatively straightforward co-integration of active and passive elements.

Proceedings Article | 1 April 2022 Presentation

Presentation

Terahertz frequency combs from dispersion compensated and RF injection locked quantum cascade ring lasers

Paolo Micheletti, Urban Senica, Andres Forrer, Mattias Beck, Jérôme Faist, Giacomo Scalari

Proceedings Volume PC11987, PC1198701 (2022) https://doi.org/10.1117/12.2609479

KEYWORDS: Quantum cascade lasers, Frequency combs, Dispersion, Waveguides, Waveguide lasers, Wave propagation, Terahertz radiation, Solitons, RF coupling, Metals

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Proceedings Article | 9 March 2022 Presentation

Presentation

THz QCL combs under strong RF injection: temporal dynamics and harmonic states

Giacomo Scalari, Andres Forrer, Urban Senica, Sara Cibella, Guido Torrioli, Paolo Micheletti, Mattias Beck, Jerome Faist

Proceedings Volume PC12021, PC120210B (2022) https://doi.org/10.1117/12.2606770

KEYWORDS: Terahertz radiation, Quantum cascade lasers, Waveguides, Modulation, RF coupling, Polymers, Picosecond phenomena, Mid-IR, Laser resonators, Frequency modulation

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Proceedings Article | 5 March 2022 Presentation

Presentation

Spectral phase relation in broadband THz quantum cascade laser frequency combs under strong RF modulation

Andres Forrer, Sara Cibella, Urban Senica, Guido Torrioli, Mattias Beck, Jérôme Faist, Giacomo Scalari

Proceedings Volume PC12009, PC120090F (2022) https://doi.org/10.1117/12.2608603

KEYWORDS: Quantum cascade lasers, Terahertz radiation, Frequency modulation, Phase shift keying, Frequency combs, Fermium, Modulation, Amplitude modulation, Waveguides, Spectroscopes

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Proceedings Article | 5 March 2022 Presentation

Presentation

Planarized waveguides for high-performance THz quantum cascade laser frequency combs

Urban Senica, Tudor Olariu, Andres Forrer, Mattias Beck, Jérôme Faist, Giacomo Scalari

Proceedings Volume PC12009, PC120090E (2022) https://doi.org/10.1117/12.2609363

KEYWORDS: Waveguides, Terahertz radiation, Frequency combs, Quantum cascade lasers, Metals, Dispersion, Continuous wave operation, Temperature metrology, Reflectors, Polymers

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Proceedings Article | 4 March 2022 Poster

Poster

Linewidth enhancement factor in quantum cascade lasers: measurements and modelling

Martin Franckie, Mathieu Bertrand, Andres Forrer, Mattias Beck, Jérôme Faist

Proceedings Volume PC11980, PC119800L (2022) https://doi.org/10.1117/12.2610615

KEYWORDS: Quantum cascade lasers, Modeling, Semiconductor lasers, Frequency combs, Structural design, Physics, Phase shift keying, Modulation, Mid-IR, Matrices

Proceedings Article | 5 March 2021 Presentation

Presentation

Self starting harmonic mode locking in THz QCL combs

Giacomo Scalari, Andres Forrer, Mattias Beck, Jerome Faist, Yongrui Wang, Alexey Belyanin

Proceedings Volume 11705, 117050T (2021) https://doi.org/10.1117/12.2578424

KEYWORDS: Terahertz radiation, Quantum cascade lasers, Mode locking, Laser resonators, Waveguides, Systems modeling, Spectroscopy, Resonators, Mid-IR, Hole burning spectroscopy

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Proceedings Article | 5 March 2021 Presentation

Presentation

Generation of harmonic frequency combs in quantum cascade lasers with two lower laser states

Yongrui Wang, Andres Forrer, Giacomo Scalari, Alexey Belyanin

Proceedings Volume 11705, 117050Z (2021) https://doi.org/10.1117/12.2583651

KEYWORDS: Quantum cascade lasers, Frequency combs, Mid-IR, Transition metals, Terahertz radiation, Optical components

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Proceedings Article | 30 March 2020 Presentation

Presentation

RF control of THz quantum cascade laser frequency combs (Conference Presentation)

Giacomo Scalari, Andres Forrer, David Stark, Urban Senica, Tudor Olariu, Philipp Täschler, Mattias Beck, Jerome Faist

Proceedings Volume 11348, 113480C (2020) https://doi.org/10.1117/12.2556090

KEYWORDS: Terahertz radiation, Quantum cascade lasers, Frequency combs, Mid-IR, Photon transport, Microwave radiation, Feedback control, Time metrology, Physics

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Proceedings Article | 10 March 2020 Presentation

Presentation

High-performance THz QCL frequency combs (Conference Presentation)

Andres Forrer, Lorenzo Bosco, Mattias Beck, Jérôme Faist, Giacomo Scalari

Proceedings Volume 11288, 112881L (2020) https://doi.org/10.1117/12.2546349

KEYWORDS: Terahertz radiation, Quantum cascade lasers, Continuous wave operation, Frequency combs, Waveguides, Pulsed laser operation, Gold, Light emitting diodes, Temperature metrology, Astatine

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Proceedings Article | 9 March 2020 Presentation

Presentation

Broadband THz and mid-IR quantum-cascade-laser frequency combs (Conference Presentation)

Giacomo Scalari, Andres Forrer, Matthew Singleton, David Stark, Filippos Kapsalidis, Mattias Beck, Jerome Faist

Proceedings Volume 11301, 1130118 (2020) https://doi.org/10.1117/12.2548656

KEYWORDS: Terahertz radiation, Mid-IR, Frequency combs, Quantum cascade lasers, Metals, Waveguides, Pulsed laser operation, Liquids, Nitrogen

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Proceedings Article | 8 March 2019 Presentation

Presentation

Wide-bandwidth low-threshold THz frequency combs (Conference Presentation)

Giacomo Scalari, Tudor Olariu, Andres Forrer, David Stark, Mattias Beck, Jerome Faist

Proceedings Volume 10926, 109262J (2019) https://doi.org/10.1117/12.2507299

KEYWORDS: Terahertz radiation, Frequency combs, Mid-IR, Quantum cascade lasers, Time metrology, Bolometers, Time resolved spectroscopy, Spectroscopy, Actuators

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Showing 5 of 17 publications

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