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Laurell, Fredrik, professorORCID iD iconorcid.org/0000-0001-7688-1367
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Publications (10 of 797) Show all publications
Maniewski, P., Brunzell, M., Harvey, C., Barrett, L., Pasiskevicius, V., Laurell, F. & Fokine, M. (2023). 1530nm fiber laser fabricated via additive manufacturing of silica gain fibers. In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023: . Paper presented at 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023, Munich, Germany, Jun 26 2023 - Jun 30 2023. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>1530nm fiber laser fabricated via additive manufacturing of silica gain fibers
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2023 (English)In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023, Institute of Electrical and Electronics Engineers (IEEE) , 2023Conference paper, Published paper (Refereed)
Abstract [en]

Silica fibers are highly desired due to their robustness and easy integration with existing infrastructure. Although fabrication of silica gain fibers can be performed using well-established methods e.g., Modified Chemical Vapor Deposition (MCVD), each production cycle can be time-consuming and expensive. Additive manufacturing (AM) on the other hand is an attractive way of fabrication, where reduced waste and short cycles are widely recognized. Today, AM is commonly used to make functional components and prototypes.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2023
National Category
Composite Science and Engineering
Identifiers
urn:nbn:se:kth:diva-339698 (URN)10.1109/CLEO/EUROPE-EQEC57999.2023.10231564 (DOI)2-s2.0-85175721426 (Scopus ID)
Conference
2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023, Munich, Germany, Jun 26 2023 - Jun 30 2023
Note

Part of ISBN 9798350345995

QC 20231116

Available from: 2023-11-16 Created: 2023-11-16 Last updated: 2023-11-16Bibliographically approved
Maniewski, P., Brunzell, M., Barrett, L., Harvey, C., Pasiskevicius, V. & Laurell, F. (2023). Er-doped silica fiber laser made by powder-based additive manufacturing. Optica
Open this publication in new window or tab >>Er-doped silica fiber laser made by powder-based additive manufacturing
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2023 (English)In: Optica, E-ISSN 2334-2536Article in journal (Refereed) Published
Abstract [en]

The pursuit of advanced fiber laser technologies has driven research toward unconventional manufacturing techniques. In this work, we present an erbium-doped fiber laser made using powder-based additive manufacturing. An Er3+/Al3+ co-doped silica glass rod was printed using laser powder deposition and then used as the core material in a fiber preform. The fiber drawn from the preform exhibited the complete, desired functionality linked to Er3+ doping. To demonstrate this, a standing wave laser cavity was formed with the feedback attained from the cleaved ends of the manufactured fiber. The high quality of the fiber is showcased through a low background loss, single-mode operation, a 9.4% laser slope efficiency, and an output of 4.5 mW, limited by the available pump power. This proof-of-concept opens up promising areas for rapid fabrication and development of high-performance fibers and fiber lasers.

Place, publisher, year, edition, pages
Optica Publishing Group, 2023
National Category
Atom and Molecular Physics and Optics Manufacturing, Surface and Joining Technology Other Materials Engineering
Research subject
Physics, Optics and Photonics; Materials Science and Engineering
Identifiers
urn:nbn:se:kth:diva-335094 (URN)10.1364/optica.493601 (DOI)001106457500004 ()2-s2.0-85175436836 (Scopus ID)
Projects
2022-06180
Funder
Swedish Research Council, 2022-06180
Note

QC 20231215

Available from: 2023-08-31 Created: 2023-08-31 Last updated: 2023-12-15Bibliographically approved
Mølster, K. M., Guionie, M., Mutter, P., Zheng, A., Dherbecourt, J. B., Melkonian, J. M., . . . Pasiskevicius, V. (2023). Highly efficient, high average power, narrowband, pump-tunable BWOPO. Optics Letters, 48(24), 6484-6487
Open this publication in new window or tab >>Highly efficient, high average power, narrowband, pump-tunable BWOPO
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2023 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 48, no 24, p. 6484-6487Article in journal (Refereed) Published
Abstract [en]

We demonstrate a continuously tunable mid-infrared source that produces narrowband radiation at 1981 nm and 2145 nm based on a tunable Yb-based hybrid MOPA pump and a backward-wave optical parametric oscillator (BWOPO). The BWOPO employs a PPRKTP crystal with 580 nm domain periodicity. The BWOPO has a record-low oscillation threshold of 19.2 MW/cm2 and generates mJ level output with an overall efficiency exceeding 70%, reaching an average power of 5.65W at the repetition rate of 5 kHz. The system is mechanically robust and optical cavity-free, making it suitable for spectroscopic systems on mobile platforms. The mid-infrared signal frequency is tuned by pump tuning with a linear pump-to-signal frequency translation rate close to the predicted 1 to 1.001 Hz/Hz.

Place, publisher, year, edition, pages
Optica Publishing Group, 2023
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-341762 (URN)10.1364/OL.506647 (DOI)38099779 (PubMedID)2-s2.0-85179773591 (Scopus ID)
Note

Not duplicate with DiVA 1755027

QC 20240102

Available from: 2024-01-02 Created: 2024-01-02 Last updated: 2024-01-02Bibliographically approved
Kuo, C.-H., Wu, M.-H., Chen, C.-R., Lin, Y.-J., Laurell, F. & Huang, Y.-C. (2023). High-resolution imaging enabled by 100-kW-peak-power parametric source at 5.7 THz. Scientific Reports, 13(1)
Open this publication in new window or tab >>High-resolution imaging enabled by 100-kW-peak-power parametric source at 5.7 THz
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2023 (English)In: Scientific Reports, E-ISSN 2045-2322, Vol. 13, no 1Article in journal (Refereed) Published
Abstract [en]

Similar to x-ray imaging, THz imaging will require high power and high resolution to advance relevant applications. Previously demonstrated THz imaging usually experiences one or several difficulties in insufficient source power, poor spectral tunability, or limited resolution from a low-wavelength source. A short-wavelength radiation source in the 5-10 THz is relatively scarce. Although a shorter wavelength improves imaging resolution, widely used imaging sensors, such as microbolometers, Schottky diodes, and photoconductive antennas, are usually not sensitive to detect radiation with frequencies above 5 THz. The radiation power of a high-frequency source becomes a key factor to realize low-noise and high-resolution imaging by using an ordinary pyroelectric detector. Here, we report a successful development of a fully coherent, tunable, > 100-kW-peak-power parametric source at 5.7 THz. It is then used together with a low-cost pyroelectric detector for demonstrating high-resolution 5.7-THz imaging in comparison with 2-THz imaging. To take advantage of the wavelength tunability of the source, we also report spectrally resolved imaging between 5.55 and 5.87 THz to reveal the spectroscopic characteristics and spatial distribution of a test drug, Aprovel.

Place, publisher, year, edition, pages
Springer Nature, 2023
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-330487 (URN)10.1038/s41598-023-32969-8 (DOI)001001988600051 ()37037875 (PubMedID)2-s2.0-85152094636 (Scopus ID)
Note

QC 20230630

Available from: 2023-06-30 Created: 2023-06-30 Last updated: 2023-06-30Bibliographically approved
Kumar, T., Harish, A. V., Etcheverry, S., Margulis, W., Laurell, F. & Russom, A. (2023). Lab-in-a-fiber-based integrated particle separation and counting. Lab on a Chip, 23(9), 2286-2293
Open this publication in new window or tab >>Lab-in-a-fiber-based integrated particle separation and counting
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2023 (English)In: Lab on a Chip, ISSN 1473-0197, E-ISSN 1473-0189, Vol. 23, no 9, p. 2286-2293Article in journal (Refereed) Published
Abstract [en]

An all-fiber integrated device capable of separating and counting particles is presented. A sequence of silica fiber capillaries with various diameters and longitudinal cavities are used to fabricate the component for size-based elasto-inertial passive separation of particles followed by detection in an uninterrupted continuous flow. Experimentally, fluorescent particles of 1 μm and 10 μm sizes are mixed in a visco-elastic fluid and fed into the all-fiber separation component. The particles are sheathed by an elasticity enhancer (PEO - polyethylene oxide) to the side walls. Larger 10 μm particles migrate to the center of the silica capillary due to the combined inertial lift force and elastic force, while the smaller 1 μm particles are unaffected, and exit from a side capillary. A separation efficiency of 100% for the 10 μm and 97% for the 1 μm particles is achieved at a total flow rate of 50 μL min−1. To the best of our knowledge, this is the first time effective inertial-based separation has been demonstrated in circular cross-section microchannels. In the following step, the separated 10 μm particles are routed through another all-fiber component for counting and a counting throughput of ∼1400 particles per min is demonstrated. We anticipate the ability to combine high throughput separation and precise 3D control of particle position for ease of counting will aid in the development of advanced microflow cytometers capable of particle separation and quantification for various biomedical applications.

Place, publisher, year, edition, pages
Royal Society of Chemistry (RSC), 2023
National Category
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)
Identifiers
urn:nbn:se:kth:diva-330903 (URN)10.1039/d2lc01175a (DOI)000972119600001 ()37070926 (PubMedID)2-s2.0-85153253799 (Scopus ID)
Note

QC 20230705

Available from: 2023-07-05 Created: 2023-07-05 Last updated: 2023-07-05Bibliographically approved
Mølster, K. M., Negri, J. R., Zukauskas, A., Lee, C., Laurell, F. & Pasiskevicius, V. (2023). Multi-transversal mode pumping of narrow-bandwidth backward wave optical parametric oscillator. Optics Express, 31(15), 24320-24327
Open this publication in new window or tab >>Multi-transversal mode pumping of narrow-bandwidth backward wave optical parametric oscillator
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2023 (English)In: Optics Express, E-ISSN 1094-4087, Vol. 31, no 15, p. 24320-24327Article in journal (Refereed) Published
Abstract [en]

A stable, narrow-bandwidth (274 MHz) backward wave optical parametric oscillator (BWOPO) generating mJ-level backward signal at 1885nm and forward idler at 2495 nm is presented. The BWOPO was pumped by a single-longitudinal mode, Q-switched Nd:YAG high-energy laser at 1064 nm. We show that multi-transversal mode pumping leads to the spectral broadening of the BWOPO backward signal and the generation of nanosecond pulses 2.7 times above the Fourier transform limit. We demonstrate over 100 GHz continuous tuning of the parametric output by adjusting the temperature of the BWOPO crystal, showcasing the significant role of thermal expansion in tuning performance. The BWOPO signal was used as a seed for a single-stage PPRKTP optical parametric amplifier (OPA) to boost the narrowband signal and idler energies to 20 mJ. This combination of mJ-level BWOPO seed with a single-stage PPRKTP OPA comprises a simple concept that would benefit long-range differential absorption lidar (DIAL) in the near and mid-infrared regions.

Place, publisher, year, edition, pages
Optica Publishing Group, 2023
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-333876 (URN)10.1364/OE.494059 (DOI)001045172900001 ()37475262 (PubMedID)2-s2.0-85165535835 (Scopus ID)
Note

QC 20230815

Available from: 2023-08-15 Created: 2023-08-15 Last updated: 2023-09-21Bibliographically approved
Barrett, L., Zukauskas, A., Laurell, F. & Canalias, C. (2023). Novel Coercive Field Engineering Method for Short Period KTiOPO4. In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023: . Paper presented at 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023, Munich, Germany, Jun 26 2023 - Jun 30 2023. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Novel Coercive Field Engineering Method for Short Period KTiOPO4
2023 (English)In: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023, Institute of Electrical and Electronics Engineers (IEEE) , 2023Conference paper, Published paper (Refereed)
Abstract [en]

The development of reliable periodic poling methods that allow for sub-µm quasi-phase matched (QPM) gratings and, at the same time, allow for waveguide implementation, is of paramount importance for a large number of applications. For instance, backward-wave optical parametric oscillators [1] are only viable if the QPM period is on the same order of magnitude as the wavelengths of the interacting waves. Furthermore, the integration of such QPM devices in a waveguide format would unveil countless possibilities in quantum optics employing the crystal as an ultrabright bi-photon source with unique spectral characteristics.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2023
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-339730 (URN)10.1109/CLEO/EUROPE-EQEC57999.2023.10231883 (DOI)2-s2.0-85175713101 (Scopus ID)
Conference
2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023, Munich, Germany, Jun 26 2023 - Jun 30 2023
Note

Part of ISBN 9798350345995

QC 20231116

Available from: 2023-11-16 Created: 2023-11-16 Last updated: 2023-11-16Bibliographically approved
Mølster, K. M., Duzellier, S., Zukauskas, A., Lee, C., Laurell, F., Raybaut, M. & Pasiskevicius, V. (2023). Proton irradiation hardness of periodically poled Rb:KTP for spaceborne parametric frequency converters. Optical Materials Express, 13(2), 436-446
Open this publication in new window or tab >>Proton irradiation hardness of periodically poled Rb:KTP for spaceborne parametric frequency converters
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2023 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 13, no 2, p. 436-446Article in journal (Refereed) Published
Abstract [en]

Large aperture periodically-poled Rb:KTP crystals designed for optical parametric amplifiers in 2 µm LIDAR systems were radiation hardness tested by exposure of proton beams at 10 MeV and 60 MeV energies. An irradiation dose of 55 Gy was used to commensurate the crystals’ estimated exposure on board a mission in the low-Earth orbit. The irradiation effects were investigated by comparing optical transmission spectra and 2D effective nonlinearity mapping in a 2 µm OPO setup before and after irradiation. The results reveal that the periodically poled structure remained intact after irradiation, and the changes in the optical transmission and nonlinear properties were close to the measurement uncertainty. This investigation is essential for realizing efficient frequency converters for space applications, such as spaceborne active greenhouse gas monitoring LIDAR instruments or correlated photon-pair sources.

Place, publisher, year, edition, pages
Optica Publishing Group, 2023
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-326563 (URN)10.1364/OME.475442 (DOI)000974409900001 ()2-s2.0-85147432590 (Scopus ID)
Funder
EU, Horizon 2020, 821868
Note

QC 20230529

Available from: 2023-05-05 Created: 2023-05-05 Last updated: 2023-05-29Bibliographically approved
Mølster, K. M., Guionie, M., Mutter, P., Dherbecourt, J. B., Melkonian, J. M., Delen, X., . . . Pasiskevicius, V. (2023). Pump Tunable Mirrorless OPO: an Innovative Concept for Future Space IPDA Emitters. In: International Conference on Space Optics, ICSO 2022: . Paper presented at 2022 International Conference on Space Optics, ICSO 2022, Dubrovnik, Croatia, Oct 3 2022 - Oct 7 2022. SPIE-Intl Soc Optical Eng, Article ID 127772V.
Open this publication in new window or tab >>Pump Tunable Mirrorless OPO: an Innovative Concept for Future Space IPDA Emitters
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2023 (English)In: International Conference on Space Optics, ICSO 2022, SPIE-Intl Soc Optical Eng , 2023, article id 127772VConference paper, Published paper (Refereed)
Abstract [en]

A highly efficient mirrorless OPO tunable in the mid-infrared around 2 μm has been developed and characterized in an original pumping configuration comprising a tunable high power hybrid Ytterbium laser MOPA (Master Oscillator Power Amplifier) in the nanosecond regime. The hybrid pump laser is based on a fiber laser seeder continuously tunable over several GHz at 1030 nm, which is shaped in the time domain with acousto-optic modulators (AOM), and power amplified in a dual stage Ytterbium doped fiber amplifiers, followed by two Yb:YAG bulk amplifiers. The pump delivers up to 3.5 mJ of energy within narrowband 15 ns pulses with a 5 kHz repetition rate. The output was focused into Periodically Poled KTP (PPKTP) crystals with a quasi-Phase Matching (QPM) period of 580 nm, producing Backward Optical Parametric Oscillation (BWOPO), with a forward signal wave at 1981 nm and a backward traveling idler at 2145 nm. We report significant optical to optical efficiencies exceeding 70 % depending on crystal length and input power. As theoretically expected, the forward wave could be continuously tuned over 10 GHz following the pump frequency sweep, while the backward wave remains almost stable, both being free from mode hops. These properties obtained from an optical arrangement without free-space cavities are attractive for future space Integrated Path Differential Absorption (IPDA) Lidar applications, which require robust and efficient tunable frequency converters in the mid-infrared.

Place, publisher, year, edition, pages
SPIE-Intl Soc Optical Eng, 2023
Keywords
Backward Optical Parametric Oscillator (BWOPO), Hybrid laser, Integrated Path Differential Absorption Lidar (IPDA), Master Oscillator Power Amplifier (MOPA), single frequency infrared laser sources
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-338988 (URN)10.1117/12.2690306 (DOI)2-s2.0-85174045936 (Scopus ID)
Conference
2022 International Conference on Space Optics, ICSO 2022, Dubrovnik, Croatia, Oct 3 2022 - Oct 7 2022
Note

Part of ISBN 9781510668034

QC 20231101

Available from: 2023-11-01 Created: 2023-11-01 Last updated: 2023-11-01Bibliographically approved
Mutter, P., Laurell, F., Pasiskevicius, V. & Zukauskas, A. (2023). The first backward wave optical parametric oscillator waveguide. In: Optics & Photonics Sweden 2023: . Paper presented at Optics & Photonics in Sweden, Kista, Sweden, 17-19 Oct 2023.
Open this publication in new window or tab >>The first backward wave optical parametric oscillator waveguide
2023 (English)In: Optics & Photonics Sweden 2023, 2023Conference paper, Poster (with or without abstract) (Refereed)
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-338702 (URN)
Conference
Optics & Photonics in Sweden, Kista, Sweden, 17-19 Oct 2023
Note

QC 20231025

Available from: 2023-10-24 Created: 2023-10-24 Last updated: 2023-10-25Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0001-7688-1367

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