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Zakrisson, J., Silander, I., de Oliveira, V. S., Hjältén, A., Rosina, A., Rubin, T., . . . Axner, O. (2024). Procedure for automated low uncertainty assessment of empty cavity mode frequencies in Fabry-Pérot cavity based refractometry. Optics Express, 32(3), 3959-3973
Open this publication in new window or tab >>Procedure for automated low uncertainty assessment of empty cavity mode frequencies in Fabry-Pérot cavity based refractometry
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2024 (English)In: Optics Express, E-ISSN 1094-4087, Vol. 32, no 3, p. 3959-3973Article in journal (Refereed) Published
Abstract [en]

A procedure for automated low uncertainty assessment of empty cavity mode frequencies in Fabry-Pérot cavity based refractometry that does not require access to laser frequency measuring instrumentation is presented. It requires a previously well-characterized system regarding mirror phase shifts, Gouy phase, and mode number, and is based on the fact that the assessed refractivity should not change when mode jumps take place. It is demonstrated that the procedure is capable of assessing mode frequencies with an uncertainty of 30 MHz, which, when assessing pressure of nitrogen, corresponds to an uncertainty of 0.3 mPa. 

Place, publisher, year, edition, pages
Optica Publishing Group (formerly OSA), 2024
Keywords
Cavity resonators, Fabry-Perot interferometers, Fiber optic sensors, nitrogen, Cavity-mode frequencies, Fabry-Perot cavity, Gouy phase, Laser frequency, Mode frequencies, Mode number, Phase number, Refractometry, Uncertainty, Uncertainty assessment, adolescent, adult, article, female, frequency, human, laser, male, normal human, pressure, surgery, therapy, Uncertainty analysis
National Category
Physical Sciences
Identifiers
urn:nbn:se:ri:diva-71939 (URN)10.1364/OE.513708 (DOI)2-s2.0-85183822866 (Scopus ID)
Available from: 2024-02-27 Created: 2024-02-27 Last updated: 2024-02-27Bibliographically approved
Rebolledo-Salgado, I., Helgason, O. B., Girardi, M., Zelan, M. & Torres-Company, V. (2023). Active Feedback Stabilization of Super-efficient Microcombs. In: 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC): . Paper presented at 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Active Feedback Stabilization of Super-efficient Microcombs
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2023 (English)In: 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Institute of Electrical and Electronics Engineers (IEEE), 2023Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

In the past years, major scientific and technological progress has been made in the field of dissipative Kerr solitons (DKS) frequency combs on microresonators (microcombs) [1]. The generation of microcombs in $\text{Si}_{3}\mathrm{N}_{4}$ microresonators exhibit broad bandwidth, high repetition rate, and low power consumption. These capabilities have opened a venue for applications within optical communication [2]. However, continuous operation and high power per comb line are needed in order to address the demands of system-level applications. Recent works have demonstrated the generation of bright solitons with unprecedented high power conversion efficiency using photonic molecules [3]. In this work, we report the continuous operation of a super-efficient DKS microcomb over 25 hours using a packaged module. The soliton state is maintained by the stabilization of thermal drifts and the on-chip optical power in the cavity. Our photonic molecule is composed of two coupled cavities with heaters placed on top. The fabricated device has been robustly packaged into a fiber-connectorized module to prevent random variations of the power coupling (Fig. 1(a)). The experimental setup used for the feedback control is shown in Fig 1. (b). The comb is generated with 20 mW of on-chip optical power covering a bandwidth of $\sim 100$ nm, see Fig. 1(c). The power conversion efficiency of the bright soliton corresponds to 32 percent. The long-term operation is achieved by harnessing the thermal drifting of the main resonance via a feedback loop implemented on an FPGA board. The soliton power is used as a control parameter to maintain a fixed pump detuning. This indicates that the coupling between these parameters holds in the super-efficient configuration of the photonic molecule as in [4]. Fig. 1(d) shows the spectral envelope of the microcomb with constant power over 25 hours. Since the pump laser is free-running, the active control forces the cavity to follow in order to maintain a fixed pump detuning. As a result, the frequency of the repetition rate of the microcomb drifts over 800 kHz towards higher frequencies (Fig. 1(e)). The frequency drifting of the pump laser (Toptica CTL) was monitored over the last 5 hours of the soliton existence by beating versus a frequency comb (Menlo FC1500), see Fig. 1(f). During the first 100 minutes of recording the resulting beat note drifts, increasing the frequency until it leaves the set span window. As the drifting continues, the beating with a neighboring line of the frequency comb is observed. The soliton power is stabilized as the photo-detected converted power remains constant (Fig. 1(f)). Nevertheless, the drifts exhibited are very minor, and we expect increased stability by feeding back into the laser piezo-control.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2023
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-68552 (URN)10.1109/CLEO/Europe-EQEC57999.2023.10232765 (DOI)
Conference
2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
Available from: 2023-12-13 Created: 2023-12-13 Last updated: 2023-12-13Bibliographically approved
Silander, I., Zakrisson, J., Zelan, M. & Axner, O. (2023). An Invar-based dual Fabry-Perot cavity refractometer for assessment of pressure with a pressure independent uncertainty in the sub-mPa region. Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics, 41(6), Article ID 064206.
Open this publication in new window or tab >>An Invar-based dual Fabry-Perot cavity refractometer for assessment of pressure with a pressure independent uncertainty in the sub-mPa region
2023 (English)In: Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics, ISSN 2166-2746, E-ISSN 2166-2754, Vol. 41, no 6, article id 064206Article in journal (Refereed) Published
Abstract [en]

An updated version of an Invar-based dual Fabry-Perot cavity refractometer utilizing the gas modulation methodology has been characterized with regard to its ability to assess gas pressure in the low pressure regime, defined as the regime in which the instrumentation is mainly limited by the constant term a in the [ ( a ) 2 + ( b × P ) 2 ] 1 / 2 expression for the uncertainty. It is first concluded that this ability is predominantly limited by three entities, viz., the empty cavity repeatability, the residual gas pressures in the evacuated (measurement) cavity, and the contamination of the gas residing in the measurement cavity that originates from leaks and outgassing. We then present and utilize methods to separately estimate the uncertainty of the updated refractometer from these entities. It was found that, when utilizing gas modulation cycles of 100 s and when addressing nitrogen, the system can assess pressure in the low pressure regime with an expanded uncertainty ( k = 2 ) of 0.75 mPa, mainly limited by the empty cavity repeatability and outgassing of hydrogen. This is more than 1 order of magnitude below the previously assessed low pressure performance of the instrumentation.

Place, publisher, year, edition, pages
AVS Science and Technology Society, 2023
Keywords
Fabry-Perot interferometers; Fiber optic sensors; Refractometers; Uncertainty analysis; Fabry-Perot cavity; Gas pressures; Low pressures; Modulation cycles; Orders of magnitude; Performance; Pressure regime; Residual gas pressure; Uncertainty; Gases
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:ri:diva-69281 (URN)10.1116/6.0003149 (DOI)2-s2.0-85180985439 (Scopus ID)
Note

This work has received funding from the European Partnership on Metrology (MQB-Pascal, 22IEM04) and co-financed from the European Union’s Horizon Europe Research and Innovation Programme and by the Participating States. It has also been supported by Vetenskapsrådet (VR) (2020-05105) and the Vinnova Metrology Programme (2018-04570).

Available from: 2024-01-11 Created: 2024-01-11 Last updated: 2024-01-11Bibliographically approved
Forssén, C., Silander, I., Zakrisson, J., Amer, E., Szabo, D., Bock, T., . . . Zelan, M. (2023). Demonstration of a Transportable Fabry–Pérot Refractometer by a Ring-Type Comparison of Dead-Weight Pressure Balances at Four European National Metrology Institutes. Sensors, 24(1)
Open this publication in new window or tab >>Demonstration of a Transportable Fabry–Pérot Refractometer by a Ring-Type Comparison of Dead-Weight Pressure Balances at Four European National Metrology Institutes
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2023 (English)In: Sensors, E-ISSN 1424-8220, Vol. 24, no 1Article in journal (Refereed) Epub ahead of print
Abstract [en]

Fabry–Pérot-based refractometry has demonstrated the ability to assess gas pressure with high accuracy and has been prophesized to be able to realize the SI unit for pressure, the pascal, based on quantum calculations of the molar polarizabilities of gases. So far, the technology has mostly been limited to well-controlled laboratories. However, recently, an easy-to-use transportable refractometer has been constructed. Although its performance has previously been assessed under well-controlled laboratory conditions, to assess its ability to serve as an actually transportable system, a ring-type comparison addressing various well-characterized pressure balances in the 10–90 kPa range at several European national metrology institutes is presented in this work. It was found that the transportable refractometer is capable of being transported and swiftly set up to be operational with retained performance in a variety of environments. The system could also verify that the pressure balances used within the ring-type comparison agree with each other. These results constitute an important step toward broadening the application areas of FP-based refractometry technology and bringing it within reach of various types of stakeholders, not least within industry.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-70575 (URN)10.3390/s24010007 (DOI)
Note

This work has received funding from the EMPIR programme (QuantumPascal, 18SIB04), which is co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. It has also been received funding from the European Partnership on Metrology, co-financed from the European Union’s Horizon Europe Research and Innovation Programme and by the Participating States. (Funder name: European Partnership on Metrology; Funder ID: 10.13039/100019599; Grant number: 22IEM04 MQB-Pascal. This research was additionally funded by Vetenskapsrådet (VR) grant number 621-2020-05105, Umeå University Industrial doctoral school within the IDS-18 programme, and the Vinnova Metrology Programme grant numbers 2018-04570 and 2019-05029

Available from: 2024-01-22 Created: 2024-01-22 Last updated: 2024-01-22Bibliographically approved
Rebolledo-Salgado, I., Quevedo-Galan, C., Helgason, Ã. B., Lööf, A., Ye, Z., Lei, F., . . . Torres-Company, V. (2023). Platicon dynamics in photonic molecules. Communications Physics, 6(1), Article ID 303.
Open this publication in new window or tab >>Platicon dynamics in photonic molecules
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2023 (English)In: Communications Physics, E-ISSN 2399-3650, Vol. 6, no 1, article id 303Article in journal (Refereed) Published
Abstract [en]

Coherent dissipative structures known as platicons can be reliably generated in photonic molecules, resulting in deterministic and reproducible microcombs derived from a continuous-wave pump. However, the supermode spectrum of standard photonic molecules displays numerous avoided mode crossings, distorting the spectral envelope of platicon microcombs. Here, we obtain a platicon microcomb using a photonic molecule configuration based on two coupled microcavities, whose size differs by an order of magnitude. This results in an engineered microcomb spectrum that closely resembles the one generated in an ideal single microresonator with just one frequency mode shift. We observe the coupling between the repetition rate of the platicon microcomb with the frequency of the pump laser, an effect originating from the dispersive-wave recoil induced by mode crossings. Using two identical platicon microcombs, we make use of such coupling to realize dual-comb interferometry. These results contribute to understanding dissipative structures in normal-dispersion microresonators and offer an alternative to applications such as spectroscopy and metrology. 

Place, publisher, year, edition, pages
Nature Research, 2023
Keywords
Dispersion (waves); Molecules; Pumping (laser); Continuous wave pump; Deterministics; Dissipative structure; Micro resonators; Microcombs; Molecule configurations; Photonic molecules; Spectra’s; Spectral envelopes; Supermodes; Microresonators
National Category
Physical Sciences
Identifiers
urn:nbn:se:ri:diva-67662 (URN)10.1038/s42005-023-01424-5 (DOI)2-s2.0-85174435356 (Scopus ID)
Note

This work was supported by the European Research Council (GA 771410 DarkComb); Vetenskapsrådet (VR-2020-00453); Stiftelsen för Strategisk Forskning (FID16-0011). C.Q.G. acknowledges support from “Programa Propio UPM” of Universidad Politécnica de Madrid and from grants TED2021-131957B-100 and PID2021-1234590B-C21 funded by MCIN/AEI/10.13039/ 501100011033 and by the European Union NextGeneration EU/PRTR and ERDF “A way of making Europe”. The SiN devices were fabricated at Myfab Chalmers. 3 4

Available from: 2023-11-29 Created: 2023-11-29 Last updated: 2023-11-29Bibliographically approved
Rebolledo-Salgado, I., Durán, V., Helgason, Ó. B., Girardi, M., Zelan, M. & Torres-Company, V. (2023). Thermal-Controlled Scanning of a Bright Soliton in a Photonic Molecule. 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. 26 June 2023 through 30 June 2023. Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Thermal-Controlled Scanning of a Bright Soliton in a Photonic Molecule
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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 Inc. , 2023Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Over the last few years, dissipative Kerr solitons (DKS) in microresonators have boosted the development of chip-scale frequency comb sources (microcombs) in a variety of applications, from coherent communications to ultrafast distance ranging [1]. However, the intrinsic large free spectral range (FSR) of microcombs (within the gigahertz regime) is still a drawback for applications such as molecular spectroscopy, in which the comb line spacing dictates the spectral sampling resolution. Overcoming spectral sparsity by scanning the comb modes across a full FSR is challenging for a DKS microcomb, since the soliton operation must be kept while the pump laser is continuously swept. So far, it has been accomplished for a single microresonator by combining a feedback control loop with the thermal tuning of the cavity resonances by means of a microheater [2]. Recently, the use of two linearly coupled cavities (a photonic molecule) has shown to be a promising alternative to generate soliton microcombs with high conversion efficiency and uniform power distribution [3]. In this contribution, we address the challenge of scanning the soliton comb modes of a photonic molecule by thermal tuning. Specifically, we implement a scheme to scan a bright soliton over 60 GHz by tuning simultaneously the pump laser and the resonances of two coupled cavities.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2023
Keywords
Conversion efficiency; Microresonators; Molecular spectroscopy; Molecules; Pumping (laser); Bright solitons; Comb modes; Coupled cavity; Free spectral range; Kerr solitons; Micro resonators; Microcombs; Photonic molecules; Pump laser; Thermal tuning; Solitons
National Category
Physical Sciences
Identifiers
urn:nbn:se:ri:diva-68014 (URN)10.1109/CLEO/EUROPE-EQEC57999.2023.10231468 (DOI)2-s2.0-85175734356 (Scopus ID)
Conference
2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. Munich, Germany. 26 June 2023 through 30 June 2023
Available from: 2023-11-23 Created: 2023-11-23 Last updated: 2023-11-30Bibliographically approved
Forssén, C., Silander, I., Zakrisson, J., Zelan, M. & Axner, O. (2022). An optical pascal in Sweden. Journal of Optics, 24(3), Article ID 033002.
Open this publication in new window or tab >>An optical pascal in Sweden
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2022 (English)In: Journal of Optics, ISSN 2040-8978, E-ISSN 2040-8986, Vol. 24, no 3, article id 033002Article in journal (Refereed) Published
Abstract [en]

By measuring the refractivity and the temperature of a gas, its pressure can be assessed from fundamental principles. The highest performing instruments are based on Fabry-Perot cavities where a laser is used to probe the frequency of a cavity mode, which is shifted in relation to the refractivity of the gas in the cavity. Recent activities have indicated that such systems can demonstrate an extended uncertainty in the 10 ppm (parts-per-million or 10-6) range. As a means to reduce the influence of various types of disturbances (primarily drifts and fluctuations) a methodology based on modulation, denoted gas modulation refractometry (GAMOR), has recently been developed. Systems based on this methodology are in general high-performance, e.g. they have demonstrated precision in the sub-ppm range, and they are sturdy. They can also be made autonomous, allowing for automated and unattended operation for virtually infinite periods of time. To a large degree, the development of such instruments depends on the access to modern photonic components, e.g. narrow line-width lasers, electro-and acousto-optic components, and various types of fiber components. This work highlights the role of such modern devices in GAMOR-based instrumentation and provides a review on the recent development of such instruments in Sweden that has been carried out in a close collaboration between a research institute and the Academy. It is shown that the use of state-of-the-art photonic devices allows sturdy, automated and miniaturized instrumentation that, for the benefit of industry, can serve as standards for pressure and provide fast, unattended, and calibration-free pressure assessments at a fraction of the present cost. © 2022 The Author(s).

Place, publisher, year, edition, pages
IOP Publishing Ltd, 2022
Keywords
Fabry-Perot, optical, pascal, pressure, refractometry, Sweden, Fabry-Perot interferometers, Photonic devices, Refraction, Refractive index, Cavity mode, Fundamental principles, Optical-, Parts per millions, Performance, Uncertainty, Modulation
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-58896 (URN)10.1088/2040-8986/ac4ea2 (DOI)2-s2.0-85125850587 (Scopus ID)
Note

Funding details: 2017-05013, 2018-04570, 2019-05029; Funding details: Horizon 2020 Framework Programme, H2020; Funding details: European Metrology Programme for Innovation and Research, EMPIR, 18SIB04; Funding details: Vetenskapsrådet, VR, 621-2015-04374, 621-2020-05105; Funding details: Umeå Universitet; Funding details: Kempestiftelserna, 1823, U12; Funding text 1: This work has received funding from the EMPIR programme (QuantumPascal, 18SIB04), which is co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. It has also been supported by Vetenskapsrådet (VR) (621-2015-04374 and 621-2020-05105); the Umeå University Industrial doctoral school (IDS-18); the Vinnova Metrology Programme (2017-05013, 2018-04570, and 2019-05029); and the Kempe Foundations (1823.U12).

Available from: 2022-03-25 Created: 2022-03-25 Last updated: 2023-05-25Bibliographically approved
Rebolledo-Salgado, I., Ye, Z., Christensen, S., Lei, F., Twayana, K., Schröder, J., . . . Torres-Company, V. (2022). Coherent supercontinuum generation in all-normal dispersion Si3N4 waveguides. Optics Express, 30(6), 8641-8651
Open this publication in new window or tab >>Coherent supercontinuum generation in all-normal dispersion Si3N4 waveguides
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2022 (English)In: Optics Express, E-ISSN 1094-4087, Vol. 30, no 6, p. 8641-8651Article in journal (Refereed) Published
Abstract [en]

Spectral broadening of optical frequency combs with high repetition rate is of significant interest in optical communications, radio-frequency photonics and spectroscopy. Silicon nitride waveguides (Si3N4) in the anomalous dispersion region have shown efficient supercontinuum generation spanning an octave-bandwidth. However, the broadening mechanism in this regime is usually attained with femtosecond pulses in order to maintain the coherence. Supercontinuum generation in the normal dispersion regime is more prone to longer (ps) pulses, but the implementation in normal dispersion silicon nitride waveguides is challenging as it possesses strong requirements in propagation length and losses. Here, we experimentally demonstrate the use of a Si3N4 waveguide to perform coherent spectral broadening using pulses in the picosecond regime with high repetition rate. Moreover, our work explores the formation of optical wave breaking using a higher energy pulse which enables the generation of a coherent octave spanning spectrum. These results offer a new prospect for coherent broadening using long duration pulses and replacing bulky optical components.

Place, publisher, year, edition, pages
The Optical Society, 2022
Keywords
Dispersion (waves), Electric losses, Electromagnetic pulse, Optical communication, Pulse repetition rate, Silicon nitride, Waveguides, All-normal dispersions, Communication radios, High repetition rate, Optical frequency combs, Optical-frequency combs, Radio-frequency photonics, Radio-frequency spectroscopy, Silicon nitride waveguides, Spectral broadening, Supercontinuum generation
National Category
Other Physics Topics
Identifiers
urn:nbn:se:ri:diva-58889 (URN)10.1364/OE.450987 (DOI)2-s2.0-85125874624 (Scopus ID)
Note

 Funding details: FID16- 0011, VR-2020-00453; Funding details: European Research Council, ERC, GA 771410; Funding text 1: European Research Council (GA 771410 DarkComb); Vetenskapsr?det (VR-2020-00453); Stiftelsen f?r Strategisk Forskning (FID16- 0011).

Available from: 2022-03-30 Created: 2022-03-30 Last updated: 2023-05-25Bibliographically approved
Silander, I., Zakrisson, J., Silva De Oliveira, V., Forssén, C., Foltynowicz, A., Rubin, T., . . . Axner, O. (2022). In situ determination of the penetration depth of mirrors in Fabry-Perot refractometers and its influence on assessment of refractivity and pressure. Optics Express, 30(14), 25891-25906
Open this publication in new window or tab >>In situ determination of the penetration depth of mirrors in Fabry-Perot refractometers and its influence on assessment of refractivity and pressure
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2022 (English)In: Optics Express, E-ISSN 1094-4087, Vol. 30, no 14, p. 25891-25906Article in journal (Refereed) Published
Abstract [en]

A procedure is presented for in situ determination of the frequency penetration depth of coated mirrors in Fabry-Perot (FP) based refractometers and its influence on the assessment of refractivity and pressure. It is based on assessments of the absolute frequency of the laser and the free spectral range of the cavity. The procedure is demonstrated on an Invar-based FP cavity system with high-reflection mirrors working at 1.55 µm. The influence was assessed with such a low uncertainty that it does not significantly contribute to the uncertainties (k = 2) in the assessment of refractivity (<8 × 10−13) or pressure of nitrogen (<0.3 mPa).

Place, publisher, year, edition, pages
Optica Publishing Group (formerly OSA), 2022
Keywords
Mirrors, Refraction, Refractive index, Refractometers, Absolute frequency, Cavity system, Fabry-Perot, Fabry-Perot cavity, Free spectral range, High reflection mirrors, Uncertainty, Uncertainty analysis
National Category
Subatomic Physics
Identifiers
urn:nbn:se:ri:diva-59905 (URN)10.1364/OE.463285 (DOI)2-s2.0-85135073412 (Scopus ID)
Note

 Funding details: 2018-04570; Funding details: Horizon 2020 Framework Programme, H2020; Funding details: Knut och Alice Wallenbergs Stiftelse; Funding details: Vetenskapsrådet, VR, 2020-00238, 2020-05105; Funding details: Umeå Universitet, IDS-18; Funding details: Kempestiftelserna; Funding text 1: European Metrology Programme for Innovation and Research (18SIB04); Vetenskapsrådet (2020-00238, 2020-05105); Umeå Universitet (IDS-18); Knut och Alice Wallenbergs Stiftelse (2020.0303); VINNOVA (2018-04570); Kempestiftelserna (1823.U12).; Funding text 2: Acknowledgments. This work has received funding from the EMPIR Programme (QuantumPascal), which is co-financed by the Participating States and from the European Union’s Horizon 2020 Research and Innovation Programme. It has also been supported by Vetenskapsrådet (VR); the Umeå University Industrial Doctoral school; Knut and Alice Wallenberg Foundation (KAW); the Vinnova Metrology Programme (2018-04570); and the Kempe Foundations. The authors additionally acknowledge technical assistance of the Umeå Core facility for Electron Microscopy (UCEM) at the Chemical Biological Centre (KBC), Umeå University.

Available from: 2022-08-11 Created: 2022-08-11 Last updated: 2023-05-25Bibliographically approved
Rebolledo-Salgado, I., Helgason, Ó., Ye, Z., Schröder, J., Zelan, M. & Torres-Company, V. (2022). Photonic molecule microcombs at 50 GHz repetition rate. In: Optics InfoBase Conference Papers: . Paper presented at CLEO: Science and Innovations, S and I 2022, 15 May 2022 through 20 May 2022. Optica Publishing Group (formerly OSA), Article ID SW4O.8.
Open this publication in new window or tab >>Photonic molecule microcombs at 50 GHz repetition rate
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2022 (English)In: Optics InfoBase Conference Papers, Optica Publishing Group (formerly OSA) , 2022, article id SW4O.8Conference paper, Published paper (Refereed)
Abstract [en]

We present a microcomb in a photonic molecule with 50 GHz repetition rate. The comb attains > 50% power conversion efficiency and displays a quiet point of operation in repetition rate with decreased phase noise. © 2022 The Author(s)

Place, publisher, year, edition, pages
Optica Publishing Group (formerly OSA), 2022
Keywords
Microcombs, Phase-noise, Photonic molecules, Point of operation, Power conversion efficiencies, Repetition rate, Molecules
National Category
Physical Sciences
Identifiers
urn:nbn:se:ri:diva-60166 (URN)10.1364/CLEO_SI.2022.SW4O.8 (DOI)2-s2.0-85136791497 (Scopus ID)9781557528209 (ISBN)
Conference
CLEO: Science and Innovations, S and I 2022, 15 May 2022 through 20 May 2022
Note

Funding details: European Research Council, ERC, GA 771410; Funding details: Stiftelsen för Strategisk Forskning, SSF, FID16-0011; Funding details: Vetenskapsrådet, VR, 2020-00453; Funding text 1: This work has been supported by the Swedish Research Council (2020-00453), the European Research Council (DarkComb GA 771410) and the Swedish Foundation for Strategic Research (FID16-0011).

Available from: 2022-10-10 Created: 2022-10-10 Last updated: 2023-05-25Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0001-9068-6031

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