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Publications (10 of 68) Show all publications
Jia, S., Pang, X., Ozolins, O., Yu, X., Hu, H., Yu, J., . . . Oxenlowe, L. K. (2018). 0.4 THz Photonic-Wireless Link With 106 Gb/s Single Channel Bitrate. Paper presented at Optical Fiber Communications Conference and Exhibition (OFC), MAR 19-23, 2017, Los Angeles, CA. Journal of Lightwave Technology, 36(2), 610-616
Open this publication in new window or tab >>0.4 THz Photonic-Wireless Link With 106 Gb/s Single Channel Bitrate
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2018 (English)In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 36, no 2, p. 610-616Article in journal (Refereed) Published
Abstract [en]

To accommodate the demand of exponentially increased global wireless data traffic, the prospective data rates for wireless communication in the market place will soon reach 100 Gb/s and beyond. In the lab environment, wireless transmission throughput has been elevated to the level of over 100 Gb/s attributed to the development of photonic-assisted millimeter wave and terahertz (THz) technologies. However, most of recent demonstrations with over 100 Gb/s data rates are based on spatial or frequency division multiplexing techniques, resulting in increased system's complexity and energy consumption. Here, we experimentally demonstrate a single channel 0.4 THz photonic-wireless link achieving a net data rate of beyond 100 Gb/s by using a single pair of THz emitter and receiver, without employing any spatial/frequency division multiplexing techniques. The high throughput up to 106 Gb/s within a single THz channel is enabled by combining spectrally efficient modulation format, ultrabroadband THz transceiver and advanced digital signal processing routine. Besides that, our demonstration from system-wide implementation viewpoint also features high transmission stability, and hence shows its great potential to not only decrease the system's complexity, butalsomeet the requirements of prospective data rates for bandwidth-hungryshort-range wireless applications.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2018
Keywords
Radio frequency photonics, single channel, THz wireless transmission, ultrafast information processing
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-223807 (URN)10.1109/JLT.2017.2776320 (DOI)000425207000055 ()2-s2.0-85035814757 (Scopus ID)
Conference
Optical Fiber Communications Conference and Exhibition (OFC), MAR 19-23, 2017, Los Angeles, CA
Note

QC 20180307

Available from: 2018-03-07 Created: 2018-03-07 Last updated: 2018-03-07Bibliographically approved
Zhang, L., Pang, X., Ozolins, O., Udalcovs, A., Schatz, R., Westergren, U., . . . Chen, J. (2018). 15-Gbaud PAM4 Digital Mobile Fronthaul with Enhanced Differential Pulse Coding Modulation Supporting 122 LTE-A Channels with up to 4096QAM. In: 2017 European Conference on Optical Communication (ECOC): . Paper presented at 43rd European Conference on Optical Communication, ECOC 2017, Gothenburg, Sweden, 17 September 2017 through 21 September 2017 (pp. 1-3). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>15-Gbaud PAM4 Digital Mobile Fronthaul with Enhanced Differential Pulse Coding Modulation Supporting 122 LTE-A Channels with up to 4096QAM
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2018 (English)In: 2017 European Conference on Optical Communication (ECOC), Institute of Electrical and Electronics Engineers (IEEE), 2018, p. 1-3Conference paper, Published paper (Refereed)
Abstract [en]

By employing enhanced DPCM, 15-Gbaud PAM4 digital mobile fronthaul is experimentally demonstrated to support 122 LTE-A channels with up to 4096QAM. Compared to PCM based CPRI, the supported number of channels increases 5 times and EVM is obviously improved.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-228555 (URN)10.1109/ECOC.2017.8346198 (DOI)000434969300372 ()2-s2.0-85046939372 (Scopus ID)9781538656242 (ISBN)
Conference
43rd European Conference on Optical Communication, ECOC 2017, Gothenburg, Sweden, 17 September 2017 through 21 September 2017
Funder
Swedish Foundation for Strategic Research Swedish Research CouncilGöran Gustafsson Foundation for Research in Natural Sciences and Medicine
Note

QC 20180528

Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2018-08-28Bibliographically approved
Mardoyan, H., Jorge, F., Ozolins, O., Estaran, J. M., Udalcovs, A., Konczykowska, A., . . . Bigo, S. (2018). 204-GBaud On-Off Keying Transmitter for Inter-Data Center Communications. In: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings: . Paper presented at We demonstrate an on-off keyed transmitter with direct detection, at record symbol rates of 204Gbaud and 140Gbaud, over 10km and 80km, respectively, powered by a high-speed InP-based 2:1 selector and travelling-wave electro-absorption laser-modulator.. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>204-GBaud On-Off Keying Transmitter for Inter-Data Center Communications
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2018 (English)In: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings, Institute of Electrical and Electronics Engineers (IEEE), 2018Conference paper, Published paper (Refereed)
Abstract [en]

We demonstrate an on-off keyed transmitter with direct detection, at record symbol rates of 204Gbaud and 140Gbaud, over 10km and 80km, respectively, powered by a high-speed InP-based 2: 1 selector and travelling-wave electro-absorption laser-modulator.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-232642 (URN)000437286300703 ()2-s2.0-85050011867 (Scopus ID)9781943580385 (ISBN)
Conference
We demonstrate an on-off keyed transmitter with direct detection, at record symbol rates of 204Gbaud and 140Gbaud, over 10km and 80km, respectively, powered by a high-speed InP-based 2:1 selector and travelling-wave electro-absorption laser-modulator.
Note

QC 20180803

Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-02Bibliographically approved
Mardoyan, H., Jorge, F., Ozolins, O., Estaran, J. M., Udalcovs, A., Konczykowska, A., . . . Bigo, S. (2018). 204-GBaud On-OffKeying transmitter for inter-data center communications. In: Optics InfoBase Conference Papers: . Paper presented at Optical Fiber Communication Conference, OFC 2018, San Diego, United States, 11 March 2017 through 15 March 2017. Optics Info Base, Optical Society of America
Open this publication in new window or tab >>204-GBaud On-OffKeying transmitter for inter-data center communications
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2018 (English)In: Optics InfoBase Conference Papers, Optics Info Base, Optical Society of America, 2018Conference paper, Published paper (Refereed)
Abstract [en]

We demonstrate an on-offkeyed transmitter with direct detection, at record symbol rates of 204Gbaud and 140Gbaud, over 10km and 80km, respectively, powered by a high-speed InPbased 2:1 selector and travelling-wave electro-absorption laser-modulator.

Place, publisher, year, edition, pages
Optics Info Base, Optical Society of America, 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-228663 (URN)10.1364/OFC.2018.Th4A.4 (DOI)2-s2.0-85047130701 (Scopus ID)9781557528209 (ISBN)
Conference
Optical Fiber Communication Conference, OFC 2018, San Diego, United States, 11 March 2017 through 15 March 2017
Note

QC 20180529

Available from: 2018-05-29 Created: 2018-05-29 Last updated: 2018-05-29Bibliographically approved
Van Kerrebrouck, J., Zhang, L., Lin, R., Pang, X., Udalcovs, A., Ozolins, O., . . . Yin, X. (2018). 726.7-Gb/s 1.5-mu m Single-Mode VCSEL Discrete Multi-Tone Transmission over 2.5-km Multicore Fiber. In: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings: . Paper presented at 2018 Optical Fiber Communications Conference and Exposition, OFC 2018, San Diego, United States, 11 March 2018 through 15 March 2018. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>726.7-Gb/s 1.5-mu m Single-Mode VCSEL Discrete Multi-Tone Transmission over 2.5-km Multicore Fiber
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2018 (English)In: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings, Institute of Electrical and Electronics Engineers (IEEE), 2018Conference paper, Published paper (Refereed)
Abstract [en]

A 107Gb/s net-rate DMT optical signal was generated using a single-mode long-wavelength VCSEL with a modulation bandwidth of 23GHz. We experimentally demonstrated a total net-rate up to 726.7Gb/s at 1.5 mu m over 2.5km 7-core dispersion-uncompensated MCF.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-232647 (URN)000437286300048 ()9781943580385 (ISBN)
Conference
2018 Optical Fiber Communications Conference and Exposition, OFC 2018, San Diego, United States, 11 March 2018 through 15 March 2018
Note

QC 20180802

Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-02Bibliographically approved
Van Kerrebrouck, J., Zhang, L., Lin, R., Pang, X., Udalcovs, A., Ozolins, O., . . . Yin, X. (2018). 726.7-Gb/s 1.5-μm single-mode VCSEL discrete multi-tone transmission over 2.5-km multicore fiber. In: Optics InfoBase Conference Papers: . Paper presented at Optical Fiber Communication Conference, OFC 2018, San Diego, United States, 11 March 2017 through 15 March 2017. Optics Info Base, Optical Society of America
Open this publication in new window or tab >>726.7-Gb/s 1.5-μm single-mode VCSEL discrete multi-tone transmission over 2.5-km multicore fiber
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2018 (English)In: Optics InfoBase Conference Papers, Optics Info Base, Optical Society of America, 2018Conference paper, Published paper (Refereed)
Abstract [en]

A 107Gb/s net-rate DMT optical signal was generated using a single-mode longwavelength VCSEL with a modulation bandwidth of 23GHz. We experimentally demonstrated a total net-rate up to 726.7Gb/s at 1.5μm over 2.5km 7-core dispersion-uncompensated MCF.

Place, publisher, year, edition, pages
Optics Info Base, Optical Society of America, 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-228667 (URN)10.1364/OFC.2018.M1I.2 (DOI)2-s2.0-85047127923 (Scopus ID)9781557528209 (ISBN)
Conference
Optical Fiber Communication Conference, OFC 2018, San Diego, United States, 11 March 2017 through 15 March 2017
Note

QC 20180529

Available from: 2018-05-29 Created: 2018-05-29 Last updated: 2018-05-29Bibliographically approved
Pang, X., Van Kerrebrouck, J., Ozolins, O., Lin, R., Udalcovs, A., Zhang, L., . . . Chen, J. (2018). 7x100 Gbps PAM-4 Transmission over 1-km and 10-km Single Mode 7-core Fiber using 1.5-mu m SM-VCSEL. In: 2018 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXPOSITION (OFC): . Paper presented at Optical Fiber Communications Conference and Exposition (OFC),San Diego, CA, MAR 11-15, 2018. Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>7x100 Gbps PAM-4 Transmission over 1-km and 10-km Single Mode 7-core Fiber using 1.5-mu m SM-VCSEL
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2018 (English)In: 2018 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXPOSITION (OFC), Institute of Electrical and Electronics Engineers (IEEE), 2018Conference paper, Published paper (Refereed)
Abstract [en]

100 Gbps/lambda/core PAM-4 transmission is successfully demonstrated over 1-km and 10km single mode 7-core fiber links, enabled by directly modulated 1.5-mu m single mode VCSEL of 23 GHz modulation bandwidth with pre-and post-digital equalizations.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-232644 (URN)000437286300050 ()9781943580385 (ISBN)
Conference
Optical Fiber Communications Conference and Exposition (OFC),San Diego, CA, MAR 11-15, 2018
Funder
Swedish Research CouncilSwedish Foundation for Strategic Research EU, FP7, Seventh Framework Programme, 318228EU, Horizon 2020, 688572VINNOVA, C2015/3-5
Note

QC 20180802

Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-02Bibliographically approved
Koivurova, M., Vasileva, E., Li, Y., Berglund, L. & Popov, S. (2018). Complete spatial coherence characterization of quasi-random laser emission from dye doped transparent wood. Optics Express, 26(10), 13474-13482
Open this publication in new window or tab >>Complete spatial coherence characterization of quasi-random laser emission from dye doped transparent wood
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2018 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 26, no 10, p. 13474-13482Article in journal (Refereed) Published
Abstract [en]

We report on the experimental determination of the complete two coordinate spatial coherence function of light emitted by a quasi-random laser, implemented on recently introduced dye-doped transparent wood. The spatial coherence was measured by means of a double grating interferometer, which has some advantages over the standard Young's interferometer. Analysis of the spatial coherence reveals that emission from such a material can be considered as a superposition of several spatial modes produced by individual emitters within semi-ordered scattering medium. The overall degree of coherence, (gamma)over-bar, for this quasi-random laser was found to be 0.16 +/- 0.01, having possible applications in speckle free laser imaging and illumination.

Place, publisher, year, edition, pages
OPTICAL SOC AMER, 2018
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-231223 (URN)10.1364/OE.26.013474 (DOI)000432457600117 ()29801372 (PubMedID)2-s2.0-85047074022 (Scopus ID)
Note

QC 20180628

Available from: 2018-06-28 Created: 2018-06-28 Last updated: 2018-06-28Bibliographically approved
Xu, T., Jacobsen, G., Li, J., Leeson, M. & Popov, S. (2018). Dynamic physical layer equalization in optical communication networks. Optoelectronics and Advanced Materials Rapid Communications, 12(5-6), 292-298
Open this publication in new window or tab >>Dynamic physical layer equalization in optical communication networks
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2018 (English)In: Optoelectronics and Advanced Materials Rapid Communications, ISSN 1842-6573, E-ISSN 2065-3824, Vol. 12, no 5-6, p. 292-298Article in journal (Refereed) Published
Abstract [en]

In optical transport networks, signal lightpaths between two terminal nodes can be different due to current network conditions. Thus the transmission distance and accumulated dispersion in the lightpath cannot be predicted. Therefore, the adaptive compensation of dynamic dispersion is necessary in such networks to enable flexible routing and switching. In this paper, we present a detailed analysis on the adaptive dispersion compensation using the least-mean-square (LMS) algorithm in coherent optical communication networks. It is found that the variable-step-size LMS equalizer can achieve the same performance with a lower complexity, compared to the traditional LMS algorithm.

Place, publisher, year, edition, pages
NATL INST OPTOELECTRONICS, 2018
Keywords
Optical fiber communication, Coherent detection, Dynamic electronic equalization, Chromatic dispersion, Least mean square algorithm, Variable step size least mean square algorithm
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-234210 (URN)000441824000010 ()2-s2.0-85051355251 (Scopus ID)
Funder
Swedish Research Council, 0379801
Note

QC 20180906

Available from: 2018-09-06 Created: 2018-09-06 Last updated: 2018-09-06Bibliographically approved
Loiko, P., Maria Serres, J., Delekta, S. S., Kifle, E., Boguslawski, J., Kowalczyk, M., . . . Östling, M. (2018). Inkjet-printing of graphene saturable absorbers for similar to 2 mu m bulk and waveguide lasers. Optical Materials Express, 8(9), 2803-2814
Open this publication in new window or tab >>Inkjet-printing of graphene saturable absorbers for similar to 2 mu m bulk and waveguide lasers
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2018 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 8, no 9, p. 2803-2814Article in journal (Refereed) Published
Abstract [en]

A technique for inkjet-printing of graphene saturable absorbers (SAs) for similar to 2-mu m bulk and waveguide lasers is presented. Based on distillation-assisted solvent exchange to fabricate high-concentration graphene inks, this technique is capable of producing few-layer graphene films of arbitrary shape. Absorption saturation of graphene printed on glass is demonstrated at similar to 1.56 mu m for picosecond and femtosecond pulses indicating a large fraction of the saturable losses. Inkjet-printed transmission-type graphene SAs are applied in passively Q-switched nanosecond thulium (Tm) microchip and planar waveguide lasers. The Tm microchip laser generates 136 ns / 1.2 mu J pulses at 1917 nm with a repetition rate of 0.37 MHz with a Q-switching conversion efficiency reaching 65%. The planar waveguide laser generates 98 ns / 21 nJ pulses at 1834 nm at a repetition rate in the MHz-range. The inkjet-printing technique is promising for production of patterned SAs for waveguide lasers.

Place, publisher, year, edition, pages
Optical Society of America, 2018
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-235113 (URN)10.1364/OME.8.002803 (DOI)000443314600037 ()2-s2.0-85052662930 (Scopus ID)
Note

QC 20180919

Available from: 2018-09-19 Created: 2018-09-19 Last updated: 2018-09-19Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-3627-8085

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