• Ørsteds Plads, 343, 128

    2800 Kgs. Lyngby

    Denmark

1994 …2020

Research output per year

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Research Output

2020

High gain in a dual-pass rod-type fiber amplifier

Lupi, J. F., Johansen, M. M., Michieletto, M., Christensen, S. L. & Lægsgaard, J., 1 Jan 2020, In : Journal of the Optical Society of America B: Optical Physics. 37, 2, p. 451-458

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
48 Downloads (Pure)

Novel high-speed camera analysis of transverse mode instabilities in rod fiber amplifiers

Christensen, S. L., Johansen, M. M., Michieletto, M., Triches, M., Hout, L., Maack, M. D. & Lægsgaard, J., 2020, Proceedings of SPIE . SPIE - International Society for Optical Engineering, Vol. 11260. 9 p. 1126017. (Proceedings of SPIE, the International Society for Optical Engineering, Vol. 11260).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Open Access
File
48 Downloads (Pure)

Thermo-optic instabilities in asymmetric dual-core amplifiers

Lægsgaard, J., Poli, F., Cucinotta, A. & Selleri, S., 1 May 2020, In : Journal of the Optical Society of America B: Optical Physics. 37, 5, p. 1494-1501

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
27 Downloads (Pure)
2019

Continuum generation in higher-order modes of photonic crystal fibers

Lægsgaard, J., 1 Jun 2019, Proceedings of 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference. IEEE, 8871915

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Efficient Simulation of Symmetric Field Propagation in Parabolic-index Fibers

Lægsgaard, J., 2019, Proceedings of 2019 PhotonIcs and Electromagnetics Research Symposium - Spring. IEEE, 8 p. 9017441. (Progress in Electromagnetics Research Symposium).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Full-vectorial multimode nonlinear simulations on a real-space Fourier–Gauss grid

Lægsgaard, J., 1 Jan 2019, In : Journal of the Optical Society of America B: Optical Physics. 36, 8, p. 2235-2243 9 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Generation of clustered frequency comb via intermodal four-wave mixing in an integrated Si3N4 microresonator

Kamel, A. N., El Dirani, H., Casale, M., Kerdiles, S., Socquet-Clerc, C., Pu, M., Oxenløwe, L. K., Yvind, K., Lægsgaard, J. & Sciancalepore, C., 2019, CLEO: Science and Innovations 2019. IEEE, 2 p. Paper SF3H.2

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

High gain and per in double-pass rod fiber amplifier module

Lupi, J. F., Johansen, M. M., Michieletto, M. & Lægsgaard, J., 1 Jun 2019, Proceedings of 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference. IEEE, 8871575

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Low-noise femtosecond Cherenkov fiber laser, continuously tunable across the entire red-green-blue spectral range

Liu, X., Lægsgaard, J., Iegorov, R., Svane, A. S., Ilday, F. O., Tu, H., Boppart, S. A. & Turchinovich, D., 2019, In : EPJ Web of Conferences. 205, 3 p., 01002 .

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
6 Downloads (Pure)

Modal properties of Yb-doped 4-core fibers under heat load

Poli, F., Lagsgaard, J., Cucinotta, A. & Selleri, S., 1 Jun 2019, Proceedings of 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference. IEEE, 8871733

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Narrow-linewidth all-solid large-mode-area photonic crystal fiber amplifier

Hauge, J. M., Papior, S. R., Pedersen, J. E., Christensen, S. L., Bondu, M., Alkeskjold, T. T. & Lægsgaard, J., 2019, Proceedings of spie. SPIE - International Society for Optical Engineering, Vol. 10897. 6 p. 1089728. (Proceedings of SPIE, the International Society for Optical Engineering, Vol. 10897).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Open Access
File
211 Downloads (Pure)

Photonic crystal fiber technology for monolithic single-mode large mode area all-solid amplifier

Christensen, S. L., Papior, S. R., Johansen, M. M., Hauge, J. M., Weirich, J., Jakobsen, C., Michieletto, M., Bondu, M., Triches, M., Alkeskjold, T. T. & Lægsgaard, J., 2019, Proceedings of SPIE. SPIE - International Society for Optical Engineering, Vol. 10897. 7 p. 108971L . (Proceedings of SPIE, the International Society for Optical Engineering, Vol. 10897).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Open Access
File
209 Downloads (Pure)

Poor-man's model of hollow-core anti-resonant fibers

Bache, M., Habib, M. S., Markos, C. & Lægsgaard, J., 2019, In : Journal of the Optical Society of America B-optical Physics. 36, 1, p. 69-80

Research output: Contribution to journalJournal articleResearchpeer-review

Static and dynamic mode instabilities in dual-core fiber amplifiers

Lægsgaard, J., Poli, F., Cucinotta, A. & Selleri, S., 1 Mar 2019, In : Journal of the Optical Society of America B: Optical Physics. 36, 3, p. 757-767

Research output: Contribution to journalJournal articleResearchpeer-review

UV-Light Generation in Silicon Nitride Resonators Pumped at Telecom Wavelengths

Casale, M., El Dirani, H., Kamel, A. N., Kerdiles, S., Lægsgaard, J., Letartre, X., Monat, C., Oxenløwe, L. K., Pu, M., Sciancalepore, C., Socquet-Clerc, C. & Yvind, K., 2019, Proceedings of 2019 IEEE 16th International Conference on Group IV Photonics (GFP). IEEE, 2 p. 08853948

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

2018

Cherenkov radiation from 1550 nm pumping in tapered photonic crystal fibers

Lægsgaard, J., 2018, In : Optics Letters. 43, 12, p. 2744-2747 4 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Designing fiber tapers for tunable dispersive-wave generation from agile Yb-based pump lasers

Lægsgaard, J., 2018, In : Journal of the Optical Society of America B-optical Physics. 35, 6, p. 1433-1441 9 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Scaling relations for soliton compression and dispersive-wave generation in tapered optical fibers

Lægsgaard, J., 2018, In : Optical Society of America. Journal B: Optical Physics. 35, 4, p. 783-789

Research output: Contribution to journalJournal articleResearchpeer-review

Spatial beam cleanup by pure Kerr processes in multimode fibers

Lægsgaard, J., 2018, In : Optics Letters. 43, 11, p. 2700-2703

Research output: Contribution to journalJournal articleResearchpeer-review

Static and dynamic mode coupling in a double-pass rod-type fiber amplifier

Lupi, J. F., Johansen, M. M., Michieletto, M. & Lægsgaard, J., 15 Nov 2018, In : Optics Letters. 43, 22, p. 5535-5538

Research output: Contribution to journalJournal articleResearchpeer-review

The Bowtie effect in cylindrical waveguides

Astorino, A., Lægsgaard, J. & Rottwitt, K., 2018, In : Journal of Lightwave Technology. 36, 16, p. 3309-17

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
195 Downloads (Pure)

Theory of thermo-optic instabilities in dual-core fiber amplifiers

Lægsgaard, J., Poli, F., Cucinotta, A. & Selleri, S., 2018, In : Optics Letters. 43, 19, p. 4775-4778

Research output: Contribution to journalJournal articleResearchpeer-review

Thermal Effects on Modal Properties of Dual-Core Yb-Doped Fibers

Poli, F., Laegsgaard, J., Cucinotta, A. & Selleri, S., 1 Jan 2018, In : Journal of Lightwave Technology. 37, 4, p. 1075 - 1083

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
223 Downloads (Pure)
2017

Azimuthal asymmetry in HE1,X modes analyzed

Astorino, A., Usuga Castaneda, M. A., Israelsen, S. M., Lægsgaard, J. & Rottwitt, K., 2017, Frontiers in Optics 2017. Optical Society of America OSA, 2 p. JTu3A.87

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Open Access
File
247 Downloads (Pure)

Efficient simulation of multimodal nonlinear propagation in step-index fibers

Lægsgaard, J., 2017, In : Journal of the Optical Society of America B-optical Physics. 34, 10, p. 2266-2273

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
357 Downloads (Pure)

Flexible cross-correlated (C2) imaging method for the modal content characterization in a broad range of wavelengths

Muliar, O., Usuga Castaneda, M. A., Michieletto, M., Kristensen, T., Alkeskjold, T. T., Rottwitt, K. & Lægsgaard, J., 2017, In : Optics Express. 25, 5, p. 5521-5535 281618.

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
318 Downloads (Pure)

High precision Cross-correlated imaging in Few-mode fibers

Muliar, O., Usuga Castaneda, M. A., Kristensen, T., Alkeskjold, T. T., Rottwitt, K. & Lægsgaard, J., 2017, Proceedings of SPIE . SPIE - International Society for Optical Engineering, Vol. 10130. 7 p. 101300T. (Proceedings of SPIE, the International Society for Optical Engineering, Vol. 10130).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Open Access
File
254 Downloads (Pure)

Nonlinearity-tailored fiber laser technology for low-noise, ultra-wideband tunable femtosecond light generation

Liu, X., Lægsgaard, J., Iegorov, R., Svane, A. S., Ilday, F. Ö., Tu, H., Boppart, S. A. & Turchinovich, D., 2017, In : Photonics Research. 5, 6, p. 750-761

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
201 Downloads (Pure)
2016

85 μm core rod fiber amplifier delivering 350 W/m

Johansen, M. M., Michieletto, M., Kristensen, T., Alkeskjold, T. T. & Lægsgaard, J., 2016, Proceedings of SPIE. SPIE - International Society for Optical Engineering, Vol. 9728. 6 p. 97280I. (Proceedings of SPIE, the International Society for Optical Engineering, Vol. 9728).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Open Access
File
296 Downloads (Pure)

High-power picosecond pulse delivery through hollow core photonic band gap fibers

Michieletto, M., Johansen, M. M., Lyngsø, J. K., Lægsgaard, J., Bang, O. & Alkeskjold, T. T., 2016, Proceedings of SPIE. SPIE - International Society for Optical Engineering, Vol. 9728. 5 p.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Hollow-core fibers for high power pulse delivery

Michieletto, M., Lyngsø, J. K., Jakobsen, C., Lægsgaard, J., Bang, O. & Alkeskjold, T. T., 2016, In : Optics Express. 24, 7, p. 7103-7119

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
483 Downloads (Pure)

Optimizing Yb concentration of fiber amplifiers in the presence of transverse modal instabilities and photodarkening

Lægsgaard, J., 2016, In : Applied Optics. 55, 8, p. 1966-1970

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
325 Downloads (Pure)

Progress in Cherenkov femtosecond fiber lasers

Liu, X., Svane, A. S., Lægsgaard, J., Tu, H., Boppart, S. A. & Turchinovich, D., 2016, In : Journal of Physics D: Applied Physics. 49, 2, 023001 .

Research output: Contribution to journalJournal articleResearchpeer-review

Stain-free histopathology by programmable supercontinuum pulses

Tu, H., Liu, Y., Turchinovich, D., Marjanovic, M., Lyngsøe, J. K., Lægsgaard, J., Chaney, E. J., Zhao, Y., You, S., Wilson, W. L., Xu, B., Dantus, M. & Boppart, S. A., 2016, In : Nature Photonics. 10, 8, p. 534-540 7 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
217 Downloads (Pure)

Static thermo-optic instability in double-pass fiber amplifiers

Lægsgaard, J., 2016, In : Optics Express. 24, 12, p. 13429-13443

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
212 Downloads (Pure)
2015

Fiber-based portable optical frequency standard for telecommunication

Triches, M., Brusch, A., Hald, J., Lægsgaard, J. & Bang, O., 2015, Proceedings of 2015 Conference on Lasers and Electro-Optics (CLEO). IEEE, 7183737

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

High Power Performance of Rod Fiber Amplifiers

Johansen, M. M., Michieletto, M., Kristensen, T., Alkeskjold, T. T. & Lægsgaard, J., 2015, Workshop on Specialty Optical Fibers and their Applications 2015. Optical Society of America

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

High-power picosecond pulse delivery through hollow core photonic band gap fibers

Michieletto, M., Johansen, M. M., Lyngsø, J. K., Lægsgaard, J., Bang, O. & Alkeskjold, T. T., 2015, Workshop on Specialty Optical Fibers and their Applications 2015. Optical Society of America, 2 p.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Interferometric characterization of few-mode fibers (FMF) for mode-division multiplexing (MDM)

Muliar, O., Usuga Castaneda, M. A., Rottwitt, K. & Lægsgaard, J., 2015, Proceedings of SPIE. Soskind, Y. G. & Olson, C. (eds.). SPIE - International Society for Optical Engineering, Vol. 9369. 936909. (Proceedings of SPIE, the International Society for Optical Engineering, Vol. 9369).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Open Access
File
539 Downloads (Pure)

Intermodal and cross-polarization four-wave mixing in large-core hybrid photonic crystal fibers

Petersen, S. R., Alkeskjold, T. T., Olausson, C. B. T. & Lægsgaard, J., 2015, In : Optics Express. 23, 5, p. 5954-5971

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
367 Downloads (Pure)

Large-mode-area hybrid photonic crystal fiber amplifier at 1178 nm

Petersen, S. R., Chen, M., Shirakawa, A., Olausson, C. B. T., Alkeskjold, T. T. & Lægsgaard, J., 2015, In : Optics Letters. 40, 8, p. 1741-1744

Research output: Contribution to journalJournal articleResearchpeer-review

Optical frequency stabilization using gas-filled hollow-core photonic crystal fibers

Triches, M., Hald, J., Lyngsoe, J. K., Bang, O. & Lægsgaard, J., 2015, 2014 Photonics Europe: Technical Summaries. p. 90-91 2 p.

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

Optical frequency standard using acetylene-filled hollow-core photonic crystal fibers

Triches, M., Michieletto, M., Hald, J., Lyngsø, J. K., Lægsgaard, J. & Bang, O., 2015, In : Optics Express. 23, 9, p. 11227-11241

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
303 Downloads (Pure)

Polarization switch of four-wave mixing in large mode area hybrid photonic crystal fibers

Petersen, S. R., Alkeskjold, T. T., Olausson, C. B. T. & Lægsgaard, J., 2015, In : Optics Letters. 40, 4, p. 487-490

Research output: Contribution to journalJournal articleResearchpeer-review

Wavelength-tunable laser based on nonlinear dispersive-wave generation in a tapered optical waveguide.

Lægsgaard, J., Turchinovich, D., Liu, X. & Svane, A. S., 10 Dec 2015, IPC No. H01S 3/ 067 A I, Patent No. WO2015185678, 10 Dec 2015, Priority date 5 Jan 2015, Priority No. DK20150070003

Research output: Patent

Open Access
File
116 Downloads (Pure)

Wireless Distributed Antenna MIMO

Jensen, J. B., Broeng, J., Nielsen, K. & Lægsgaard, J., 12 Feb 2015, IPC No. H04B10/2575, H04J14/00, H04J14/02, H04J14/04, Patent No. WO2015018947, 12 Feb 2015, Priority date 9 Aug 2013, Priority No. EP20130179950

Research output: Patent

Open Access
File
176 Downloads (Pure)
2014

Boundaries of Parametric Gain due to Four-wave Mixing in Hybrid Photonic Crystal Fibers

Petersen, S. R., Lægsgaard, J. & Alkeskjold, T. T., 2014, Proceedings of 2014 Conference on Lasers and Electro-Optics (CLEO). IEEE, 2 p.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Cladding defects in hollow core fibers for surface mode suppression and improved birefringence

Michieletto, M., Lyngso, J. K., Lægsgaard, J. & Bang, O., 2014, In : Optics Express. 22, 19, p. 23324-23332

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
456 Downloads (Pure)

Electrically-Tunable Multi-Color Ultrafast Cherenkov FiberLaser

Svane, A. S., Liu, X., Lægsgaard, J., Tu, H., Boppart, S. A. & Turchinovich, D., 2014, Proceedings of 2014 Conference on Lasers and Electro-Optics (CLEO). IEEE, 2 p. ATh3P.6

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Extended parametric gain range in photonic crystal fibers with strongly frequency-dependent field distributions

Petersen, S. R., Alkeskjold, T. T., Olausson, C. B. T. & Lægsgaard, J., 2014, In : Optics Letters. 39, 16, p. 4891-4894

Research output: Contribution to journalJournal articleResearchpeer-review