R. Mupparapu, J. Cunha, F. Tantussi, A. Jacassi, L. Summerer, M. Patrini, A. Giugni, A. Alabastri, R. Proietti Zaccaria
Numerous efforts have been recently undertaken towards the development of rectifying devices operating at high frequencies especially dedicated to light harvesting and photo detection applications. To this end various rectification strategies have been implemented, such as laser-induced STM tunneling, metal-insulator-metal (MIM) travelling wave diodes, plasmonic nanogap optical antennas, antenna-diode coupled planar MIM, and MIM point-contact sharp-tip or whisker diodes. However, developing high frequency rectifying antennas (rectennas) remains a major technological challenge, as only recent progresses enabled the fabrication of efficient tunable nano-antennas at near infrared and visible frequencies. Here we report on a new type of rectenna based on plasmonic carrier generation. The proposed rectifying structure consists of a broadly resonant gold conical nano-tip antenna in contact with a metal-oxide/metal sample surface, forming a point-contact tunneling diode. The nano-sized antenna apex, designed to maximize the Surface Plasmon Polaritons (SPPs) damping, allows for an efficient power conversion from the light field into excited charges above the Fermi level, the latter ones collectable from the point-contact location through an electronic tunneling process. We demonstrated rectification operation at 280 THz with a power conversion efficiency one order of magnitude higher than the state-of-the-art which we attribute to efficient plasmonic carrier generation and collection.
{"title":"Light rectification with plasmonic nano-cone point contact-insulator-metal architecture","authors":"R. Mupparapu, J. Cunha, F. Tantussi, A. Jacassi, L. Summerer, M. Patrini, A. Giugni, A. Alabastri, R. Proietti Zaccaria","doi":"10.1117/12.2665433","DOIUrl":"https://doi.org/10.1117/12.2665433","url":null,"abstract":"Numerous efforts have been recently undertaken towards the development of rectifying devices operating at high frequencies especially dedicated to light harvesting and photo detection applications. To this end various rectification strategies have been implemented, such as laser-induced STM tunneling, metal-insulator-metal (MIM) travelling wave diodes, plasmonic nanogap optical antennas, antenna-diode coupled planar MIM, and MIM point-contact sharp-tip or whisker diodes. However, developing high frequency rectifying antennas (rectennas) remains a major technological challenge, as only recent progresses enabled the fabrication of efficient tunable nano-antennas at near infrared and visible frequencies. Here we report on a new type of rectenna based on plasmonic carrier generation. The proposed rectifying structure consists of a broadly resonant gold conical nano-tip antenna in contact with a metal-oxide/metal sample surface, forming a point-contact tunneling diode. The nano-sized antenna apex, designed to maximize the Surface Plasmon Polaritons (SPPs) damping, allows for an efficient power conversion from the light field into excited charges above the Fermi level, the latter ones collectable from the point-contact location through an electronic tunneling process. We demonstrated rectification operation at 280 THz with a power conversion efficiency one order of magnitude higher than the state-of-the-art which we attribute to efficient plasmonic carrier generation and collection.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"20 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134194771","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}
S. Chou, Sung-Wei Huang, Wei-Cheng Liu, Chen-Yu Tsai, C. Chu, Ming-Wei Lin, Shih-Hung Chen, H. Chu
The dynamics of electron injection from a shock front under a laser condition of a0 > 3 and tight focusing (FWHM < 10 µm) laser condition has been studied by numerical simulations. Compared to a regular longitudinal shockfront injection, the transverse injection starts near the edge of the bubble with a narrow energy spread of < 13 MeV. The trajectories of the transverse injected electrons are more coherent than the longitudinal injection. By applying the tilted shock front, the betatron oscillation amplitude is significantly larger than the un-tilted shock front. The enhancement of the betatron radiation brightness has been observed.
{"title":"Dynamics of monoenergetic asymmetric injection of laser wakefield accelerator","authors":"S. Chou, Sung-Wei Huang, Wei-Cheng Liu, Chen-Yu Tsai, C. Chu, Ming-Wei Lin, Shih-Hung Chen, H. Chu","doi":"10.1117/12.2665267","DOIUrl":"https://doi.org/10.1117/12.2665267","url":null,"abstract":"The dynamics of electron injection from a shock front under a laser condition of a0 > 3 and tight focusing (FWHM < 10 µm) laser condition has been studied by numerical simulations. Compared to a regular longitudinal shockfront injection, the transverse injection starts near the edge of the bubble with a narrow energy spread of < 13 MeV. The trajectories of the transverse injected electrons are more coherent than the longitudinal injection. By applying the tilted shock front, the betatron oscillation amplitude is significantly larger than the un-tilted shock front. The enhancement of the betatron radiation brightness has been observed.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130532564","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}
W. Andrysiewicz, Dominik Wojcieszczak, R. Socha, D. Sagnelli, Amalia D'Avino, L. Petti
Azobenzene-based photo-mobile polymer (PMP) samples were mechanically coupled with foils of piezoelectric material (PZM) and placed under a solar simulator. The solar simulator used a short arc xenon lamp as a light source with an AM1.5 filter o mimic the absorption spectrum of earth’s atmosphere. This setup, commonly used for testing solar cells (at a power density of 1000W/m2), was used to verify the energy generation capabilities of a PMP-PZM system. As shown in previous works, the movement of the PMPs can be attributed to a narrow spectrum of light near the UV range while heat or light outside of that narrow band can prove detrimental to the motion. Thus, to verify operation under "natural light" various methods filters are employed to the solar simulator light. The output of the PZM was loaded with a constant resistance and the voltage across the load was measured using a high impedance buffer amplifier to eliminate any other loading effects. While it was shown that any optical filters that removed the UV component lead to completely stopping the PMP motion, the system was capable of operating in direct sunlight and generated measurable energy on the load. Peak voltage of over 4V was achieved and discharged an average of 710nJ over a 50s period. This result could be significantly improved, but was limited by the mechanical capabilities of the shutter.
{"title":"Photo-mobile polymers in energy harvesting applications under simulated solar light","authors":"W. Andrysiewicz, Dominik Wojcieszczak, R. Socha, D. Sagnelli, Amalia D'Avino, L. Petti","doi":"10.1117/12.2666931","DOIUrl":"https://doi.org/10.1117/12.2666931","url":null,"abstract":"Azobenzene-based photo-mobile polymer (PMP) samples were mechanically coupled with foils of piezoelectric material (PZM) and placed under a solar simulator. The solar simulator used a short arc xenon lamp as a light source with an AM1.5 filter o mimic the absorption spectrum of earth’s atmosphere. This setup, commonly used for testing solar cells (at a power density of 1000W/m2), was used to verify the energy generation capabilities of a PMP-PZM system. As shown in previous works, the movement of the PMPs can be attributed to a narrow spectrum of light near the UV range while heat or light outside of that narrow band can prove detrimental to the motion. Thus, to verify operation under \"natural light\" various methods filters are employed to the solar simulator light. The output of the PZM was loaded with a constant resistance and the voltage across the load was measured using a high impedance buffer amplifier to eliminate any other loading effects. While it was shown that any optical filters that removed the UV component lead to completely stopping the PMP motion, the system was capable of operating in direct sunlight and generated measurable energy on the load. Peak voltage of over 4V was achieved and discharged an average of 710nJ over a 50s period. This result could be significantly improved, but was limited by the mechanical capabilities of the shutter.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"12584 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131383019","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}
D. Hammer, Philipp Schmidt, T. Michelat, T. Kluyver, Karim Ahmed, Cyril Danilevsky, R. Rosca, L. Gelisio
High data rates produced by custom-built burst mode detectors available at the European XFEL present challenges for data processing. One crucial processing step required for subsequent analysis is detector calibration and data correction. We present an overview of the calibration and correction software infrastructure developed at the European XFEL to accommodate the specific needs at the facility. We discuss the distinction between offline and online processing, outlining the roles and interesting technical properties of calibration software in both contexts. Recent improvements to the online processing software allow for correcting full detector data stream in near real time, enabling more comprehensive online analysis methods for improved steering of experiments.
{"title":"Detector calibration software infrastructure at the European XFEL","authors":"D. Hammer, Philipp Schmidt, T. Michelat, T. Kluyver, Karim Ahmed, Cyril Danilevsky, R. Rosca, L. Gelisio","doi":"10.1117/12.2669491","DOIUrl":"https://doi.org/10.1117/12.2669491","url":null,"abstract":"High data rates produced by custom-built burst mode detectors available at the European XFEL present challenges for data processing. One crucial processing step required for subsequent analysis is detector calibration and data correction. We present an overview of the calibration and correction software infrastructure developed at the European XFEL to accommodate the specific needs at the facility. We discuss the distinction between offline and online processing, outlining the roles and interesting technical properties of calibration software in both contexts. Recent improvements to the online processing software allow for correcting full detector data stream in near real time, enabling more comprehensive online analysis methods for improved steering of experiments.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125507937","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}
Justas Varpucianskis, R. Danilevičius, T. Bartulevičius, Aivaras Kazakevičius
We present our recent developments in fiber-based technologies that enable unique high energy and average power ultrafast laser operation regimes. A patented all-fiber front-end incorporates dual-wavelength pulse generation of signal and pump pulses for high intensity OPCPA systems [1]. A newly introduced all-in-fiber active fiber loop (AFL) technology allows to form bursts of ultrashort seed pulses with any desired pulse repetition rate and any number of pulses in a burst with identical intra-burst pulse separation. Furthermore, the AFL introduces the ability to build systems with tunable pulse durations from a few hundred femtoseconds to picoseconds and even up to the nanosecond range. Novel fiber technologies were implemented into a high energy pump laser for a few-cycle mid-IR OPCPA system to produce unprecedented performance and output parameters for high-field science applications.
{"title":"Novel dual-wavelength front-end with active fiber loop for high intensity laser systems","authors":"Justas Varpucianskis, R. Danilevičius, T. Bartulevičius, Aivaras Kazakevičius","doi":"10.1117/12.2676916","DOIUrl":"https://doi.org/10.1117/12.2676916","url":null,"abstract":"We present our recent developments in fiber-based technologies that enable unique high energy and average power ultrafast laser operation regimes. A patented all-fiber front-end incorporates dual-wavelength pulse generation of signal and pump pulses for high intensity OPCPA systems [1]. A newly introduced all-in-fiber active fiber loop (AFL) technology allows to form bursts of ultrashort seed pulses with any desired pulse repetition rate and any number of pulses in a burst with identical intra-burst pulse separation. Furthermore, the AFL introduces the ability to build systems with tunable pulse durations from a few hundred femtoseconds to picoseconds and even up to the nanosecond range. Novel fiber technologies were implemented into a high energy pump laser for a few-cycle mid-IR OPCPA system to produce unprecedented performance and output parameters for high-field science applications.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129258365","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}
M. Yigitoglu Keskin, W. Pring, J. A. Pérez-Hernández, Roberto Lera Matellanes, Jason Mill, D. De Luis, Nardjesse Boudjema, Ó. Varela, E. García-García, Cruz Méndez Valverde, E. Brunetti, B. Ersfeld, Sanjeev Kumar, S. Wiggins, G. Gatti, L. Volpe, L. Roso, M. Demirköz, D. Jaroszynski
Experiments have been undertaken using the VEGA-3 petawatt laser system at the Centro de Láseres Pulsados (CLPU) facility in Salamanca to investigate electron and ion acceleration in under-dense plasma. The respective longitudinal and transverse fields of the ‘bubble’ structure of a laser wakefield accelerator (LWFA) simultaneously accelerates electrons to GeV energies, and ions to 100s keV/u to MeV/u energies. The laser is configured to produce two ultra-intense laser pulses, each with a minimum pulse duration of 30 fs and a variable inter-pulse delay up to 300 fs. The double pulses can superpose or resonantly excite the LWFA bubble to increase the accelerating fields. By focusing the laser beam into a 2.74 mm diameter supersonic jet of He gas, using an F/10.4 parabola, an initial intensity of up to ≈1019 Wcm−2 can be realized at focus. This ionises the gas to produce plasma and the imposes a ponderomotive force that creates the LWFA accelerating structures. For backing pressures of 30 – 60 bar, corresponding to plasma densities of 1–4×1019 cm−3, the fields of the LWFA can exceed 200 MV/m, which is sufficient to accelerate electrons to GeV energies, and ions to 100s keV/u. This study focuses on ion acceleration in the transverse direction. He+1 and He+2 ion spectra have been measured using a Thompson parabola spectrometer and a multi-channel plate detector. He ions with energies up to a few hundred keV/u are observed for both single pulses (5.0 J) and double pulses (5.0 J and 3.6 J, respectively), where the inter-pulse delay is varied between 0 fs and ± 300 fs. The measured spectra are consistent with numerical simulations. Ions are observed to undergo electron exchange in the neutral surrounding gas, which produces different charge states ions and neutral atoms.
{"title":"Method of producing 100 keVs ion beams from a gas jet using two intense laser pulses","authors":"M. Yigitoglu Keskin, W. Pring, J. A. Pérez-Hernández, Roberto Lera Matellanes, Jason Mill, D. De Luis, Nardjesse Boudjema, Ó. Varela, E. García-García, Cruz Méndez Valverde, E. Brunetti, B. Ersfeld, Sanjeev Kumar, S. Wiggins, G. Gatti, L. Volpe, L. Roso, M. Demirköz, D. Jaroszynski","doi":"10.1117/12.2672099","DOIUrl":"https://doi.org/10.1117/12.2672099","url":null,"abstract":"Experiments have been undertaken using the VEGA-3 petawatt laser system at the Centro de Láseres Pulsados (CLPU) facility in Salamanca to investigate electron and ion acceleration in under-dense plasma. The respective longitudinal and transverse fields of the ‘bubble’ structure of a laser wakefield accelerator (LWFA) simultaneously accelerates electrons to GeV energies, and ions to 100s keV/u to MeV/u energies. The laser is configured to produce two ultra-intense laser pulses, each with a minimum pulse duration of 30 fs and a variable inter-pulse delay up to 300 fs. The double pulses can superpose or resonantly excite the LWFA bubble to increase the accelerating fields. By focusing the laser beam into a 2.74 mm diameter supersonic jet of He gas, using an F/10.4 parabola, an initial intensity of up to ≈1019 Wcm−2 can be realized at focus. This ionises the gas to produce plasma and the imposes a ponderomotive force that creates the LWFA accelerating structures. For backing pressures of 30 – 60 bar, corresponding to plasma densities of 1–4×1019 cm−3, the fields of the LWFA can exceed 200 MV/m, which is sufficient to accelerate electrons to GeV energies, and ions to 100s keV/u. This study focuses on ion acceleration in the transverse direction. He+1 and He+2 ion spectra have been measured using a Thompson parabola spectrometer and a multi-channel plate detector. He ions with energies up to a few hundred keV/u are observed for both single pulses (5.0 J) and double pulses (5.0 J and 3.6 J, respectively), where the inter-pulse delay is varied between 0 fs and ± 300 fs. The measured spectra are consistent with numerical simulations. Ions are observed to undergo electron exchange in the neutral surrounding gas, which produces different charge states ions and neutral atoms.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126174322","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}
F. Villani, F. Loffredo, G. Sico, Maria Montanino, Anna De Girolamo Del Mauro, M. F. Caso, Manojit Pusty, T. Jalabert, G. Nenna, G. Ardila
Zinc oxide (ZnO) nanowires (NWs) are excellent candidates for the fabrication of energy harvesters, mechanical sensors, piezotronic and piezo-phototronic devices thanks to the interplay between piezoelectric and semiconducting properties. The growth of ZnO NWs on flexible substrates would further broaden their possible applications. However, such a growth requires low temperature synthesis to prevent any damage to the flexible polymer. Another difficulty lies in the fact that the deposition of patterned ceramic thin films on flexible substrates is challenging, especially under vacuum free conditions. In this framework, printing technologies like inkjet and gravure printing have a noteworthy potential since they allow to deposit thin films onto flexible substrates and offer several other advantages like cost efficiency, use of low temperatures, vacuum-free processing, high throughput and the possibility of patterning during the deposition process. In this work, we report the chemical bath deposition (CBD) growth of high quality ZnO NWs on polyethylene terephthalate (PET) starting from inkjet printed seed layer constituted of ZnO nanoparticles and a comparison with that obtained with seed layer deposited by gravure technology. Using Piezoresponse Force Microscopy (PFM), we observed that the Zn-polar domains are homogeneously distributed at the top surface of the grown ZnO NWs. This work demonstrates the key benefit of the printing techniques over conventional methods (e.g. Atomic Layer Deposition, ALD) to deposit seed layers at low temperature on flexible substrates. This opens the possibility of manufacturing completely vacuum-free solution-based flexible piezoelectric devices.
{"title":"Printed ZnO nanoparticle seed layers to grow ZnO nanowires on flexible substrates","authors":"F. Villani, F. Loffredo, G. Sico, Maria Montanino, Anna De Girolamo Del Mauro, M. F. Caso, Manojit Pusty, T. Jalabert, G. Nenna, G. Ardila","doi":"10.1117/12.2666645","DOIUrl":"https://doi.org/10.1117/12.2666645","url":null,"abstract":"Zinc oxide (ZnO) nanowires (NWs) are excellent candidates for the fabrication of energy harvesters, mechanical sensors, piezotronic and piezo-phototronic devices thanks to the interplay between piezoelectric and semiconducting properties. The growth of ZnO NWs on flexible substrates would further broaden their possible applications. However, such a growth requires low temperature synthesis to prevent any damage to the flexible polymer. Another difficulty lies in the fact that the deposition of patterned ceramic thin films on flexible substrates is challenging, especially under vacuum free conditions. In this framework, printing technologies like inkjet and gravure printing have a noteworthy potential since they allow to deposit thin films onto flexible substrates and offer several other advantages like cost efficiency, use of low temperatures, vacuum-free processing, high throughput and the possibility of patterning during the deposition process. In this work, we report the chemical bath deposition (CBD) growth of high quality ZnO NWs on polyethylene terephthalate (PET) starting from inkjet printed seed layer constituted of ZnO nanoparticles and a comparison with that obtained with seed layer deposited by gravure technology. Using Piezoresponse Force Microscopy (PFM), we observed that the Zn-polar domains are homogeneously distributed at the top surface of the grown ZnO NWs. This work demonstrates the key benefit of the printing techniques over conventional methods (e.g. Atomic Layer Deposition, ALD) to deposit seed layers at low temperature on flexible substrates. This opens the possibility of manufacturing completely vacuum-free solution-based flexible piezoelectric devices.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125959012","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}
J. Csontos, S. Tóth, T. Stanislauskas, I. Balčiūnas, J. Adamonis, Ignas Abromavičius, László Tamás Tóth, T. Somoskői, Prabhash Prasannan Geetha, Dániel Abt, Barna Kajla, Rodrigo Lopez-Martens, Á. Börzsönyi
This manuscript presents the most recent upgrades made on SYLOS2 laser system in ELI-ALPS1. These modifications on the system were done based on the feedback from the experimental end-stations during the last 3 years. First, the long virtual propagation of the super-Gaussian output beam reduced by modifying the imaging telescope after the amplification stages, which significantly improved the beam profile hindered by the propagation-related diffraction pattern. The optical parametric chirped pulse amplification (OPCPA) stages were equipped with new nonlinear crystals which enabled to reach 42 mJ output energy with <8 fs pulse duration, which is 10 mJ more than the previous configuration. To increase the high-harmonic generation (HHG) efficiency a spatial filter was installed in the laser system which provides a nearly Gaussian beam profile at the output with 80% transmission. The spatial filter is based on a glass cone and is operated under vacuum. Currently, <20 mJ, <8 fs CEP-stable pulses are provided at the user stations after the beam transport system.
{"title":"Recent status of the SYLOS 2 laser system of ELI-ALPS","authors":"J. Csontos, S. Tóth, T. Stanislauskas, I. Balčiūnas, J. Adamonis, Ignas Abromavičius, László Tamás Tóth, T. Somoskői, Prabhash Prasannan Geetha, Dániel Abt, Barna Kajla, Rodrigo Lopez-Martens, Á. Börzsönyi","doi":"10.1117/12.2665699","DOIUrl":"https://doi.org/10.1117/12.2665699","url":null,"abstract":"This manuscript presents the most recent upgrades made on SYLOS2 laser system in ELI-ALPS1. These modifications on the system were done based on the feedback from the experimental end-stations during the last 3 years. First, the long virtual propagation of the super-Gaussian output beam reduced by modifying the imaging telescope after the amplification stages, which significantly improved the beam profile hindered by the propagation-related diffraction pattern. The optical parametric chirped pulse amplification (OPCPA) stages were equipped with new nonlinear crystals which enabled to reach 42 mJ output energy with <8 fs pulse duration, which is 10 mJ more than the previous configuration. To increase the high-harmonic generation (HHG) efficiency a spatial filter was installed in the laser system which provides a nearly Gaussian beam profile at the output with 80% transmission. The spatial filter is based on a glass cone and is operated under vacuum. Currently, <20 mJ, <8 fs CEP-stable pulses are provided at the user stations after the beam transport system.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115038522","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}
A. Wojtusiak, Jonathan Phillips, Jodie M. Smith, P. Mason, M. De Vido, T. Butcher, C. Hernandez-Gomez, C. Edwards, J. Collier
The Extreme Photonics Applications Centre is an upcoming state-of-the-art research facility under construction at the Rutherford Appleton Laboratory in the United Kingdom. It will deliver petawatt pulses at an unprecedented rate of 10 Hz, made possible by pumping titanium-doped sapphire gain medium with a diode-pumped solid state laser (DPSSL) based on the Central Laser Facility’s cryogenic DiPOLE technology. We will briefly present the DPSSL pump design and its incorporation into the wider PW system, reporting on the most up-todate commissioning status and results of the DPSSL pump laser, which is on target to be fully commissioned by summer 2023.
{"title":"Extreme photonics applications centre: high energy DPSSL pump for a 10 Hz PW-level laser","authors":"A. Wojtusiak, Jonathan Phillips, Jodie M. Smith, P. Mason, M. De Vido, T. Butcher, C. Hernandez-Gomez, C. Edwards, J. Collier","doi":"10.1117/12.2665736","DOIUrl":"https://doi.org/10.1117/12.2665736","url":null,"abstract":"The Extreme Photonics Applications Centre is an upcoming state-of-the-art research facility under construction at the Rutherford Appleton Laboratory in the United Kingdom. It will deliver petawatt pulses at an unprecedented rate of 10 Hz, made possible by pumping titanium-doped sapphire gain medium with a diode-pumped solid state laser (DPSSL) based on the Central Laser Facility’s cryogenic DiPOLE technology. We will briefly present the DPSSL pump design and its incorporation into the wider PW system, reporting on the most up-todate commissioning status and results of the DPSSL pump laser, which is on target to be fully commissioned by summer 2023.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128586990","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}
Sidrish Zahra, P. Di Palma, Elena De Vita, A. Srivastava, F. Esposito, A. Iadicicco, S. Campopiano
In this work we present mechanically induced Long Period Gratings (LPGs) realized in different kinds of glass optical fibers by using UV-cured 3D printed periodic grooved plate. The periodic modulation of the geometry and refractive index along the length of the optical fiber is induced by pressure applied transversely to the grooved plate and leads to light coupling between the core mode and co-propagating cladding modes at specific resonance wavelengths. Using the proposed method, we realize and analyze in detail the behavior of the gratings induced in different optical fibers (i.e., SMF-28 and two different double cladding fibers), with and without acrylate coating. Results confirm that the depth of the attenuation bands in the transmission spectrum of the gratings, which were induced by gradually increasing the applied load show high tunability in the range of 1400-1650 nm with the maximum depth of 24 dB. Among the methods used for the fabrication of LPGs, the one studied here is reversible, very low cost, easy to tune, compatible with different kind of fibers and does not require a specific preparation of the fiber. The obtained devices are potentially useful for several application spanning from filters to sensors.
{"title":"Widely tunable long period gratings using 3D printed periodic grooved plates","authors":"Sidrish Zahra, P. Di Palma, Elena De Vita, A. Srivastava, F. Esposito, A. Iadicicco, S. Campopiano","doi":"10.1117/12.2669769","DOIUrl":"https://doi.org/10.1117/12.2669769","url":null,"abstract":"In this work we present mechanically induced Long Period Gratings (LPGs) realized in different kinds of glass optical fibers by using UV-cured 3D printed periodic grooved plate. The periodic modulation of the geometry and refractive index along the length of the optical fiber is induced by pressure applied transversely to the grooved plate and leads to light coupling between the core mode and co-propagating cladding modes at specific resonance wavelengths. Using the proposed method, we realize and analyze in detail the behavior of the gratings induced in different optical fibers (i.e., SMF-28 and two different double cladding fibers), with and without acrylate coating. Results confirm that the depth of the attenuation bands in the transmission spectrum of the gratings, which were induced by gradually increasing the applied load show high tunability in the range of 1400-1650 nm with the maximum depth of 24 dB. Among the methods used for the fabrication of LPGs, the one studied here is reversible, very low cost, easy to tune, compatible with different kind of fibers and does not require a specific preparation of the fiber. The obtained devices are potentially useful for several application spanning from filters to sensors.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115522458","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}
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