Pub Date : 2019-10-17DOI: 10.1109/CLEOE-EQEC.2019.8872316
M. Kremer, Ioannis Petrides, Eric Meyer, M. Heinrich, O. Zilberberg, A. Szameit
Topological insulators have to date seen a variety of manifestations. All available realizations of topological insulators, however, share a common feature: their spectral bands are attributed with a nonlocal topological index that is quantized. In this work, we report a new type of insulator exhibiting spectral bands with nonquantized indices, yet robust boundary states. We provide a theoretical analysis based on the quantization of the indices in the corresponding system where the square of the Hamiltonian is taken and exemplify the general paradigm using photonic Aharonov-Bohm cages.
{"title":"Theoretical Analysis of a Non-Quantized Square-Root Topological Insulator using Photonic Aharonov-Bohm Cages","authors":"M. Kremer, Ioannis Petrides, Eric Meyer, M. Heinrich, O. Zilberberg, A. Szameit","doi":"10.1109/CLEOE-EQEC.2019.8872316","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2019.8872316","url":null,"abstract":"Topological insulators have to date seen a variety of manifestations. All available realizations of topological insulators, however, share a common feature: their spectral bands are attributed with a nonlocal topological index that is quantized. In this work, we report a new type of insulator exhibiting spectral bands with nonquantized indices, yet robust boundary states. We provide a theoretical analysis based on the quantization of the indices in the corresponding system where the square of the Hamiltonian is taken and exemplify the general paradigm using photonic Aharonov-Bohm cages.","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"8 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90562021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-17DOI: 10.1109/CLEOE-EQEC.2019.8872484
J. Tunesi, L. Peters, J. S. T. Gongora, A. Pasquazi, A. Fratalocchi, M. Peccianti
Plasmonic metasurfaces provide a compact platform to engineer the wave-front of optical beams by tuning the material and its morphology, hence enabling advanced functionalities in ultra-thin photonic systems [1,2]. In standard metasurfaces, however, the optical response is usually static and fixed by design. An appealing possibility to achieve ultrafast dynamical tuning is given by optically-induced plasmonic systems, where the metallic response of narrow-bandgap semiconductors is driven by high-fluence illumination. Under these conditions, the surface of the semiconductor can be overflown with photo-carriers inducing a transient metallic state [3]. An intriguing question is whether the transient metallization could be employed to dynamically engineer the optical response and to control light-matter interactions on the surface.
{"title":"Optically-Induced Dynamic Terahertz Metamaterials","authors":"J. Tunesi, L. Peters, J. S. T. Gongora, A. Pasquazi, A. Fratalocchi, M. Peccianti","doi":"10.1109/CLEOE-EQEC.2019.8872484","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2019.8872484","url":null,"abstract":"Plasmonic metasurfaces provide a compact platform to engineer the wave-front of optical beams by tuning the material and its morphology, hence enabling advanced functionalities in ultra-thin photonic systems [1,2]. In standard metasurfaces, however, the optical response is usually static and fixed by design. An appealing possibility to achieve ultrafast dynamical tuning is given by optically-induced plasmonic systems, where the metallic response of narrow-bandgap semiconductors is driven by high-fluence illumination. Under these conditions, the surface of the semiconductor can be overflown with photo-carriers inducing a transient metallic state [3]. An intriguing question is whether the transient metallization could be employed to dynamically engineer the optical response and to control light-matter interactions on the surface.","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"6 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84870826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-17DOI: 10.1109/CLEOE-EQEC.2019.8871819
S. Biswas, B. Förg, J. Schötz, W. Schweinberger, L. Ortmann, T. Zimmermann, Liangwen Pi, D. Baykusheva, H. Masood, I. Liontos, A. Kamal, N. G. Kling, A. Alharbi, M. Alharbi, Abdallah Mohammed Azzeer, H. Wörner, A. Landsman, M. Kling
The advancement of attosecond chronoscopy has made it possible to reveal ultrashort time dynamics of photoionization [1]. Ionization delay measurements in atomic targets provide a wealth of information about the timing of the photoelectric effect [2], resonances, electron correlations and transport. The extension of this approach to molecules, however, presents great challenges. In addition to the difficulty of identifying correct ionization channels, it is hard to disentangle the role of the anisotropic molecular landscape from the delays inherent to the excitation process itself. Here, we present the measurements of ionization delays from ethyl iodide around the 4d giant dipole resonance of iodine. We employ attosecond streaking spectroscopy, which enables to disentangle the contribution to the delay from the functional ethyl group, being responsible for the characteristic chemical reactivity of the molecule. An attosecond extreme ultraviolet (XUV) pulse ionizes the molecule around the energy of the giant resonance and the released electron is exposed to the ponderomotive force of a synchronized near-infrared (NIR) field, which yields a streaking spectrogram (see figure). Comparative phase analysis of the spectrograms corresponding to iodine 4d and neon 2p emission permits extracting overall photoemission delays for ethyl iodide. The data is recorded for multiple photon energies around the iodine 4d resonance and compared to classical Wigner propagation [3] and quantum scattering [4] calculations. Here the outgoing electron, produced via inner shell ionization of the iodine atom in ethyl iodide, and thereby hardly influenced by the molecular potential during the birth process, acquires the necessary information about the influence of the functional ethyl group during its propagation. We find significant delay contributions that can distinguish between different functional groups, providing a sensitive probe of the local molecular environment [5]. This would stimulate to perform further angle resolved measurements in molecules to probe the potential landscape in three dimension.
{"title":"Probing Molecular Influence on Photoemission Delays","authors":"S. Biswas, B. Förg, J. Schötz, W. Schweinberger, L. Ortmann, T. Zimmermann, Liangwen Pi, D. Baykusheva, H. Masood, I. Liontos, A. Kamal, N. G. Kling, A. Alharbi, M. Alharbi, Abdallah Mohammed Azzeer, H. Wörner, A. Landsman, M. Kling","doi":"10.1109/CLEOE-EQEC.2019.8871819","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2019.8871819","url":null,"abstract":"The advancement of attosecond chronoscopy has made it possible to reveal ultrashort time dynamics of photoionization [1]. Ionization delay measurements in atomic targets provide a wealth of information about the timing of the photoelectric effect [2], resonances, electron correlations and transport. The extension of this approach to molecules, however, presents great challenges. In addition to the difficulty of identifying correct ionization channels, it is hard to disentangle the role of the anisotropic molecular landscape from the delays inherent to the excitation process itself. Here, we present the measurements of ionization delays from ethyl iodide around the 4d giant dipole resonance of iodine. We employ attosecond streaking spectroscopy, which enables to disentangle the contribution to the delay from the functional ethyl group, being responsible for the characteristic chemical reactivity of the molecule. An attosecond extreme ultraviolet (XUV) pulse ionizes the molecule around the energy of the giant resonance and the released electron is exposed to the ponderomotive force of a synchronized near-infrared (NIR) field, which yields a streaking spectrogram (see figure). Comparative phase analysis of the spectrograms corresponding to iodine 4d and neon 2p emission permits extracting overall photoemission delays for ethyl iodide. The data is recorded for multiple photon energies around the iodine 4d resonance and compared to classical Wigner propagation [3] and quantum scattering [4] calculations. Here the outgoing electron, produced via inner shell ionization of the iodine atom in ethyl iodide, and thereby hardly influenced by the molecular potential during the birth process, acquires the necessary information about the influence of the functional ethyl group during its propagation. We find significant delay contributions that can distinguish between different functional groups, providing a sensitive probe of the local molecular environment [5]. This would stimulate to perform further angle resolved measurements in molecules to probe the potential landscape in three dimension.","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"32 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85356353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-17DOI: 10.1109/CLEOE-EQEC.2019.8873056
Michael E. Reilly, B. Flemming, M. Esser
Direct diode lasers at 2 pm provide the opportunity for more compact sources that can perform similar tasks that are currently undertaken by solid state lasers operating in this wavelength [1]. Infrared countermeasure, gas detection and atmospheric sensing are but a few examples [2]. A high brightness mid-infrared direct-diode laser diode module is presented as a compact source for atmospheric propagation. Optomechanical design enables spatial beam combining to produce excellent combined beam quality deteriorating based only on the performance of each emitter and number of emitters used. The following study showcases the optomechanical design and development of six one-tab C-mount GaSb 2.1 μm single emitter diodes in a module featuring a right-angled staircase spatial beam combining technique.
{"title":"High Brightness 2.1 μm Direct-Diode Laser Module","authors":"Michael E. Reilly, B. Flemming, M. Esser","doi":"10.1109/CLEOE-EQEC.2019.8873056","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2019.8873056","url":null,"abstract":"Direct diode lasers at 2 pm provide the opportunity for more compact sources that can perform similar tasks that are currently undertaken by solid state lasers operating in this wavelength [1]. Infrared countermeasure, gas detection and atmospheric sensing are but a few examples [2]. A high brightness mid-infrared direct-diode laser diode module is presented as a compact source for atmospheric propagation. Optomechanical design enables spatial beam combining to produce excellent combined beam quality deteriorating based only on the performance of each emitter and number of emitters used. The following study showcases the optomechanical design and development of six one-tab C-mount GaSb 2.1 μm single emitter diodes in a module featuring a right-angled staircase spatial beam combining technique.","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"26 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82111768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-17DOI: 10.1109/CLEOE-EQEC.2019.8873330
D. Bajek, S. Wackerow, M. Sitko, S. Calatroni, Beniamino Di Girolama, A. Abdolvand
Secondary Electron Yield (SEY) [3, 5] occurs in a system when a primary electron impinges a material's surface and induces the emission of a 1st and potentially 2nd generation secondary electrons (see Figure 1, Left). The total number of secondary electrons per primary electron is the SEY. This phenomenon fonns a highly challenging problem in many systems, for example in particle accelerators, where significant levels of SEY fonn as an electron cloud and can perturbate the circulating beams and generate a high level of heat load to be absorbed by cooling and cryogenics. The Large Hadron Collider (LHC) lias a 54-km beam pipe [1] in which copper-laminated steel beam-screens are placed in order to shield the beam pipes from heat loads, but inherently result in unwanted SEY. As such, the development of methods which mitigate the SEY are increasingly appealing [2], including surface texturing, shaping the geometry and orientation of patterns etched into the surfaces [3], and carbon-coating of the interior of the beam pipes in the Super Proton Synchrotron (SPS) [4], Previously we have shown that nanosecond pulsed laser treatment of copper surfaces at 532 mn could significantly increase the optical absorbance of the surface [6], and furthennore reduce the SEY to close to 1 [7], More recently we demonstrated that surface structures produced by a picosecond pulsed laser at 532mn exhibited SEY values below 1 and were successfully tested in a dipole magnet in the Super Proton Synchrotron (SPS) accelerator at CERN [8].
{"title":"Laser Engineered Surface Structures for Custom Design of Secondary Electron Yield","authors":"D. Bajek, S. Wackerow, M. Sitko, S. Calatroni, Beniamino Di Girolama, A. Abdolvand","doi":"10.1109/CLEOE-EQEC.2019.8873330","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2019.8873330","url":null,"abstract":"Secondary Electron Yield (SEY) [3, 5] occurs in a system when a primary electron impinges a material's surface and induces the emission of a 1st and potentially 2nd generation secondary electrons (see Figure 1, Left). The total number of secondary electrons per primary electron is the SEY. This phenomenon fonns a highly challenging problem in many systems, for example in particle accelerators, where significant levels of SEY fonn as an electron cloud and can perturbate the circulating beams and generate a high level of heat load to be absorbed by cooling and cryogenics. The Large Hadron Collider (LHC) lias a 54-km beam pipe [1] in which copper-laminated steel beam-screens are placed in order to shield the beam pipes from heat loads, but inherently result in unwanted SEY. As such, the development of methods which mitigate the SEY are increasingly appealing [2], including surface texturing, shaping the geometry and orientation of patterns etched into the surfaces [3], and carbon-coating of the interior of the beam pipes in the Super Proton Synchrotron (SPS) [4], Previously we have shown that nanosecond pulsed laser treatment of copper surfaces at 532 mn could significantly increase the optical absorbance of the surface [6], and furthennore reduce the SEY to close to 1 [7], More recently we demonstrated that surface structures produced by a picosecond pulsed laser at 532mn exhibited SEY values below 1 and were successfully tested in a dipole magnet in the Super Proton Synchrotron (SPS) accelerator at CERN [8].","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"42 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73677058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-17DOI: 10.1109/CLEOE-EQEC.2019.8873176
F. Cappelli, L. Consolino, G. Campo, I. Galli, D. Mazzotti, A. Campa, M. S. de Cumis, P. C. Pastor, R. Eramo, M. Rösch, M. Beck, G. Scalari, J. Faist, P. De Natale, S. Bartalini
In the direction of miniaturizing and expanding optical frequency comb (FC) operation in the infrared (IR), the most relevant results have recently been achieved with quantum cascade lasers (QCLs) [1–4]. By using broadband Fabry-Perot QCLs [5] designed to have a low group velocity dispersion, FC generation was demonstrated in fully free-running operation (QCL-combs) [6,7]. Various techniques to characterize the emission of mid- and far-infrared QCL-combs have been recently developed [6,8–12].
{"title":"Retrieving the Phase Relation of a Quantum Cascade Laser Frequency Comb and Reconstructing its Emission Profile","authors":"F. Cappelli, L. Consolino, G. Campo, I. Galli, D. Mazzotti, A. Campa, M. S. de Cumis, P. C. Pastor, R. Eramo, M. Rösch, M. Beck, G. Scalari, J. Faist, P. De Natale, S. Bartalini","doi":"10.1109/CLEOE-EQEC.2019.8873176","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2019.8873176","url":null,"abstract":"In the direction of miniaturizing and expanding optical frequency comb (FC) operation in the infrared (IR), the most relevant results have recently been achieved with quantum cascade lasers (QCLs) [1–4]. By using broadband Fabry-Perot QCLs [5] designed to have a low group velocity dispersion, FC generation was demonstrated in fully free-running operation (QCL-combs) [6,7]. Various techniques to characterize the emission of mid- and far-infrared QCL-combs have been recently developed [6,8–12].","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"27 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81246558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-17DOI: 10.1109/CLEOE-EQEC.2019.8871584
Teodora Grigo Rova, C. Brahms, F. Belli, J. Travers
Recently we have demonstrated soliton effects at high energy (0.3 mJ) in helium- and neon-filled hollow capillary fibres (HCF) [1]. We observed pulse self-compression to single-cycle durations and the generation of deep (DUV) and vacuum ultraviolet (VUV) radiation at record energy levels for a tunable source. Here, we demonstrate that soliton dynamics in capillary fibres can also be accessed with argon- and krypton-filled HCF, although ionisation effects then start to play a larger role. We also find that the DUV and VUV generation through resonant dispersive-wave (RDW) emission can be achieved at wavelengths considerably shorter than the two-photon resonances in each gas—something surprising, given previous work in gas-filled photonic crystal fibres HC-PCF [2], where soliton-related effects have been previously extensively explored at pJ pulse energy levels [3].
{"title":"Soliton-Plasma Interactions and Dispersive-Wave Emission Beyond Two-Photon Resonances in Gas-Filled Hollow Capillary Fibres","authors":"Teodora Grigo Rova, C. Brahms, F. Belli, J. Travers","doi":"10.1109/CLEOE-EQEC.2019.8871584","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2019.8871584","url":null,"abstract":"Recently we have demonstrated soliton effects at high energy (0.3 mJ) in helium- and neon-filled hollow capillary fibres (HCF) [1]. We observed pulse self-compression to single-cycle durations and the generation of deep (DUV) and vacuum ultraviolet (VUV) radiation at record energy levels for a tunable source. Here, we demonstrate that soliton dynamics in capillary fibres can also be accessed with argon- and krypton-filled HCF, although ionisation effects then start to play a larger role. We also find that the DUV and VUV generation through resonant dispersive-wave (RDW) emission can be achieved at wavelengths considerably shorter than the two-photon resonances in each gas—something surprising, given previous work in gas-filled photonic crystal fibres HC-PCF [2], where soliton-related effects have been previously extensively explored at pJ pulse energy levels [3].","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"18 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82499425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-17DOI: 10.1109/CLEOE-EQEC.2019.8872329
J. Nürnberg, C. Alfieri, D. Waldburger, L. Krüger, M. Golling, U. Keller
Multiheterodyne techniques in science and technology promise unsurpassed precision in many fields of application such as dual-comb spectroscopy or light detection and ranging (LIDAR) [1–2]. Complexity, performance and cost can be greatly improved with dual-comb semiconductor disk lasers (SDL). Integration of the active semiconductor gain of a vertical exteral-cavity surface emitting laser (VECSEL) with the saturable absorber of a semiconductor saturable absorber mirror (SESAM) in the same epitaxial structure leads to the modelocked integrated external-cavity surface emitting laser (MIXSEL) [3]. The MIXSEL allows modelocking in a simple straight cavity. With two intracavity birefringent crystals, the initially unpolarized cavity beam is seperated by polarization [4]. When optically pumping two spots on the semiconductor chip, the dual-comb MIXSEL emits two orthogonally polarized optical frequency combs (OFCs) with a slight difference in pulse repetition rate which can be freely adjusted (Fig. 1a). The common cavity leads to an intrinsically high mutual coherence between the two OFCs, making the dual-comb MIXSEL the ideal source for dual-comb spectroscopy [5] and other field-deployable multiheterodyne beatnote techniques.
{"title":"A Single Free-Running Dual-Comb MIXSEL for Fast and Precise Distance Measurements","authors":"J. Nürnberg, C. Alfieri, D. Waldburger, L. Krüger, M. Golling, U. Keller","doi":"10.1109/CLEOE-EQEC.2019.8872329","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2019.8872329","url":null,"abstract":"Multiheterodyne techniques in science and technology promise unsurpassed precision in many fields of application such as dual-comb spectroscopy or light detection and ranging (LIDAR) [1–2]. Complexity, performance and cost can be greatly improved with dual-comb semiconductor disk lasers (SDL). Integration of the active semiconductor gain of a vertical exteral-cavity surface emitting laser (VECSEL) with the saturable absorber of a semiconductor saturable absorber mirror (SESAM) in the same epitaxial structure leads to the modelocked integrated external-cavity surface emitting laser (MIXSEL) [3]. The MIXSEL allows modelocking in a simple straight cavity. With two intracavity birefringent crystals, the initially unpolarized cavity beam is seperated by polarization [4]. When optically pumping two spots on the semiconductor chip, the dual-comb MIXSEL emits two orthogonally polarized optical frequency combs (OFCs) with a slight difference in pulse repetition rate which can be freely adjusted (Fig. 1a). The common cavity leads to an intrinsically high mutual coherence between the two OFCs, making the dual-comb MIXSEL the ideal source for dual-comb spectroscopy [5] and other field-deployable multiheterodyne beatnote techniques.","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"97 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86835522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-17DOI: 10.1109/CLEOE-EQEC.2019.8872276
A. Runge, Darren D. Hudson, C. Martijn de Sterke, A. Blanco-Redondo
In optical fibre resonators, the balance between anomalous quadratic dispersion and self-phase modulation (SPM) gives rise to optical solitons [1]. These pulses have made a significant impact in a wide range of photonic applications including telecommunications and lasers. However, these conventional soliton-based lasers can only deliver modest pulse energy due to the appearance of Kelly sidebands arising from periodical perturbations in the cavity [2] and a fixed energy-width scaling. Recently, a new class of soliton, arising from the balance of anomalous quartic dispersion and SPM, called pure-quartic soliton (PQS), were observed in a dispersion engineered photonic crystal waveguide [3]. PQSs have huge potential for generating ultrashort pulses with high energy due to their generalized area theorem (E ∼ 1/Δτ3), however they are yet to be observed in fibre platforms [4]. Here we report on the generation of PQS pulses from a passively mode-locked fibre laser incorporating a programmable spectral pulse-shaper that induces a dominant quartic net cavity dispersion. We find that the spectral profile of the generated pulses are in good agreement with the spectral shape of PQSs [3]. We also observe spectral sidebands in this quartic-dispersion cavity, in analogy to the conventional soliton case [2], and find that their positions are in excellent agreement with analytic predictions. These are strong evidences of a novel type of mode-locked laser, the PQS laser, which has the potential to reach dramatically higher energies at short pulse durations than its conventional soliton counterpart [3,4].
{"title":"Pure-Quartic Solitons from a Dispersion Managed Fibre Laser","authors":"A. Runge, Darren D. Hudson, C. Martijn de Sterke, A. Blanco-Redondo","doi":"10.1109/CLEOE-EQEC.2019.8872276","DOIUrl":"https://doi.org/10.1109/CLEOE-EQEC.2019.8872276","url":null,"abstract":"In optical fibre resonators, the balance between anomalous quadratic dispersion and self-phase modulation (SPM) gives rise to optical solitons [1]. These pulses have made a significant impact in a wide range of photonic applications including telecommunications and lasers. However, these conventional soliton-based lasers can only deliver modest pulse energy due to the appearance of Kelly sidebands arising from periodical perturbations in the cavity [2] and a fixed energy-width scaling. Recently, a new class of soliton, arising from the balance of anomalous quartic dispersion and SPM, called pure-quartic soliton (PQS), were observed in a dispersion engineered photonic crystal waveguide [3]. PQSs have huge potential for generating ultrashort pulses with high energy due to their generalized area theorem (E ∼ 1/Δτ3), however they are yet to be observed in fibre platforms [4]. Here we report on the generation of PQS pulses from a passively mode-locked fibre laser incorporating a programmable spectral pulse-shaper that induces a dominant quartic net cavity dispersion. We find that the spectral profile of the generated pulses are in good agreement with the spectral shape of PQSs [3]. We also observe spectral sidebands in this quartic-dispersion cavity, in analogy to the conventional soliton case [2], and find that their positions are in excellent agreement with analytic predictions. These are strong evidences of a novel type of mode-locked laser, the PQS laser, which has the potential to reach dramatically higher energies at short pulse durations than its conventional soliton counterpart [3,4].","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"37 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85343915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-17DOI: 10.1109/cleoe-eqec.2019.8873124
I. Zhdanov, D. Kharenko, A. Bednyakova, M. Fedoruk, S. Turitsyn, S. Babin
Ultrafast fiber lasers with a high pulse energy at 1550 nm wavelength are important for a range of applications: from CARS [1], few-cycle pulse generation [2] and frequency metrology to THz-wave generation. These applications require not only the high pulse energy, but also short duration, and high generation stability. Highly chirped (chirp parameter > 10) dissipative soliton (HCDS) generation technique (HCDS) driven by the nonlinear polarization evolution (NPE) effect meets all the above requirements. Substantial HCDS energy increase has been obtained previously in Yb-fiber all-fiber NPE mode-locked cavity containing polarization maintaining (PM) and non-PM parts [3]. We have implemented this approach for 1.5 microns wavelength area for the first time in [4] demonstrating 165 fs dechirped duration and 0.93 nJ energy HCDS. We also observed a multi-pulse generation regime caused by NPE overdriving. In this work we extend our results and increase the single HCDS energy by significantly lengthening the all-fiber cavity.
{"title":"4-nJ Erbium All-Fiber Hybrid Highly Chirped Dissipative Soliton Oscillator","authors":"I. Zhdanov, D. Kharenko, A. Bednyakova, M. Fedoruk, S. Turitsyn, S. Babin","doi":"10.1109/cleoe-eqec.2019.8873124","DOIUrl":"https://doi.org/10.1109/cleoe-eqec.2019.8873124","url":null,"abstract":"Ultrafast fiber lasers with a high pulse energy at 1550 nm wavelength are important for a range of applications: from CARS [1], few-cycle pulse generation [2] and frequency metrology to THz-wave generation. These applications require not only the high pulse energy, but also short duration, and high generation stability. Highly chirped (chirp parameter > 10) dissipative soliton (HCDS) generation technique (HCDS) driven by the nonlinear polarization evolution (NPE) effect meets all the above requirements. Substantial HCDS energy increase has been obtained previously in Yb-fiber all-fiber NPE mode-locked cavity containing polarization maintaining (PM) and non-PM parts [3]. We have implemented this approach for 1.5 microns wavelength area for the first time in [4] demonstrating 165 fs dechirped duration and 0.93 nJ energy HCDS. We also observed a multi-pulse generation regime caused by NPE overdriving. In this work we extend our results and increase the single HCDS energy by significantly lengthening the all-fiber cavity.","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"226 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77480567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：