We report on efficient continuous-wave Nd:YLF laser with hot-band diode pumping at 908 nm. The laser produced an output power of 850 mW at 1047 nm with excellent beam quality. Further power scaling is possible owing to the strongly reduced quantum defect and thermal lensing.
{"title":"Efficient hot-band pumped Nd:YLF laser","authors":"Z. Sedaghati, M. Nadimi, A. Major","doi":"10.1109/PN.2019.8819554","DOIUrl":"https://doi.org/10.1109/PN.2019.8819554","url":null,"abstract":"We report on efficient continuous-wave Nd:YLF laser with hot-band diode pumping at 908 nm. The laser produced an output power of 850 mW at 1047 nm with excellent beam quality. Further power scaling is possible owing to the strongly reduced quantum defect and thermal lensing.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123393107","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}
Alan T. K. Godfrey, L. Kallepalli, Jesse Ratté, P. Corkum
We present the formation of protruding ‘blister’ microstructures in polyimide and PMMA thin films using tightly-focused femtosecond pulses. We also show that implanting a reflective metal layer in the polymer film lowers the required pulse energies for forming blisters and prevents film rupture.
{"title":"Femtosecond-Laser-Induced Blister Formation on Polymer Thin Films","authors":"Alan T. K. Godfrey, L. Kallepalli, Jesse Ratté, P. Corkum","doi":"10.1109/PN.2019.8819531","DOIUrl":"https://doi.org/10.1109/PN.2019.8819531","url":null,"abstract":"We present the formation of protruding ‘blister’ microstructures in polyimide and PMMA thin films using tightly-focused femtosecond pulses. We also show that implanting a reflective metal layer in the polymer film lowers the required pulse energies for forming blisters and prevents film rupture.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114154876","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}
Solar cells made from intermediate band (IB) materials have the potential to radically improve photovoltaic efficiencies. An efficient IB solar cell has not yet been realized due to insufficient combinations of absorption coefficients and carrier lifetimes. After describing the three classes of IB materials discovered to date, we introduce Simudo, the first device model capable of studying IB devices including all of their essential physical processes. Using Simudo, we show the material quality required for effective IB solar cells and compare to existing IB materials, showing which are most promising.
{"title":"Evaluating and optimizing intermediate band solar cells","authors":"J. Krich, Eduard C. Dumitrescu, M. Wilkins","doi":"10.1109/PN.2019.8819565","DOIUrl":"https://doi.org/10.1109/PN.2019.8819565","url":null,"abstract":"Solar cells made from intermediate band (IB) materials have the potential to radically improve photovoltaic efficiencies. An efficient IB solar cell has not yet been realized due to insufficient combinations of absorption coefficients and carrier lifetimes. After describing the three classes of IB materials discovered to date, we introduce Simudo, the first device model capable of studying IB devices including all of their essential physical processes. Using Simudo, we show the material quality required for effective IB solar cells and compare to existing IB materials, showing which are most promising.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"282 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121357883","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. Fabbri, Sylvain Chevalier, K. Lahlil, O. Lefebvre, D. Bouville, Y. Lassailly, L. Martinelli, Ahn DucVu, T. Gacoin, J. Peretti, J. Frech-Baronet, Zhao Chen, M. Fafard, L. Sorelli
Light tunable materials such as azobenzene-containing polymers are nowadays a promising way to achieve optical control of matter up to the nanoscale. In particular, the materials’ optical and mechanical responses can be tuned by controlling the spatial and temporal distribution of the projected light field, which allows to achieve precise, reversible manipulation, in real-time, of the materials’ response. The understanding of the photomechanical phenomena occurring in azopolymers will be discussed as well as their applications as multifunctional materials.
{"title":"Light tunable azopolymers : Photomechanical phenomena and multifunctional materials","authors":"F. Fabbri, Sylvain Chevalier, K. Lahlil, O. Lefebvre, D. Bouville, Y. Lassailly, L. Martinelli, Ahn DucVu, T. Gacoin, J. Peretti, J. Frech-Baronet, Zhao Chen, M. Fafard, L. Sorelli","doi":"10.1109/PN.2019.8819540","DOIUrl":"https://doi.org/10.1109/PN.2019.8819540","url":null,"abstract":"Light tunable materials such as azobenzene-containing polymers are nowadays a promising way to achieve optical control of matter up to the nanoscale. In particular, the materials’ optical and mechanical responses can be tuned by controlling the spatial and temporal distribution of the projected light field, which allows to achieve precise, reversible manipulation, in real-time, of the materials’ response. The understanding of the photomechanical phenomena occurring in azopolymers will be discussed as well as their applications as multifunctional materials.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116460938","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}
Optical tactile sensors are designed to be integrated at the tip of minimally invasive surgical instruments for the provision of tactile information to surgeons. In this study, a new bending-based sensing principle for an optical-fiber tactile sensor was validated experimentally. The postulated sensing principle showed high sensitivity and contributed to the further miniaturization of optical-fiber-based sensors.
{"title":"Validation of a Variable Bending Radius Sensing Principle for Optical-fiber Tactile Sensors","authors":"N. Bandari, J. Dargahi, M. Packirisamy","doi":"10.1109/PN.2019.8819602","DOIUrl":"https://doi.org/10.1109/PN.2019.8819602","url":null,"abstract":"Optical tactile sensors are designed to be integrated at the tip of minimally invasive surgical instruments for the provision of tactile information to surgeons. In this study, a new bending-based sensing principle for an optical-fiber tactile sensor was validated experimentally. The postulated sensing principle showed high sensitivity and contributed to the further miniaturization of optical-fiber-based sensors.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126295211","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. Lord, O. Boily, T. Boilard, G. Gari'epy, S. Grelet, L. Talbot, P. Paradis, N. Grégoire, S. Morency, Y. Messaddeq, M. Bernier
We present cw laser emission from an erbium-doped aluminophosphosilicate all-fiber laser emitting at 1584 nm with a slope efficiency of 30% with respect to the absorbed pump power.
{"title":"25 W splice-less erbium-doped fiber laser at 1584 nm","authors":"M. Lord, O. Boily, T. Boilard, G. Gari'epy, S. Grelet, L. Talbot, P. Paradis, N. Grégoire, S. Morency, Y. Messaddeq, M. Bernier","doi":"10.1109/pn.2019.8819519","DOIUrl":"https://doi.org/10.1109/pn.2019.8819519","url":null,"abstract":"We present cw laser emission from an erbium-doped aluminophosphosilicate all-fiber laser emitting at 1584 nm with a slope efficiency of 30% with respect to the absorbed pump power.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126333905","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}
Continuous-wave dual-wavelength (DW) operation of a Nd:CALGO laser based on a single plate birefringent filter (BRF) was demonstrated. A wide range of DW pairs with wavelength separation from sub-nm up to $sim10$ nm with adjustable spectral intensity ratio could be generated. Using a single transmission peak of the BRF resulted in wavelength separation far smaller than the free-spectral range (FSR) of the filter.
{"title":"Multi-pair dual-wavelength Nd:CALGO laser","authors":"R. Akbari, P. Loiko, J. Xu, X. Xu, A. Major","doi":"10.1109/PN.2019.8819517","DOIUrl":"https://doi.org/10.1109/PN.2019.8819517","url":null,"abstract":"Continuous-wave dual-wavelength (DW) operation of a Nd:CALGO laser based on a single plate birefringent filter (BRF) was demonstrated. A wide range of DW pairs with wavelength separation from sub-nm up to $sim10$ nm with adjustable spectral intensity ratio could be generated. Using a single transmission peak of the BRF resulted in wavelength separation far smaller than the free-spectral range (FSR) of the filter.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130116060","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}
We report on the continuous-wave dual-wavelength laser operation of a Nd:GdVO 4 laser using a single birefringent filter (BRF) plate. The laser operated at wavelength pair of 1063 & 1071 nm under in-band diode pumping of 912 nm.
{"title":"Diode-Pumped Dual-Wavelength Nd:GVO4 Laser","authors":"M. Nadimi, A. Major","doi":"10.1109/PN.2019.8819547","DOIUrl":"https://doi.org/10.1109/PN.2019.8819547","url":null,"abstract":"We report on the continuous-wave dual-wavelength laser operation of a Nd:GdVO 4 laser using a single birefringent filter (BRF) plate. The laser operated at wavelength pair of 1063 & 1071 nm under in-band diode pumping of 912 nm.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133814331","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}
Two aspects that have been overlooked in the published literature in relation to plasmonic Schottky junction photovoltaic devices are addressed in the present contribution. They concern the effect, on the overall efficiency, of an existing interfacial layer with optical properties different from those of the bulk and the spatial fluctuations in the potential barrier between the metal and the semiconductor.
{"title":"On the Plasmonic Schottky Photovoltaic Devices","authors":"A. Sellai","doi":"10.1109/PN.2019.8819524","DOIUrl":"https://doi.org/10.1109/PN.2019.8819524","url":null,"abstract":"Two aspects that have been overlooked in the published literature in relation to plasmonic Schottky junction photovoltaic devices are addressed in the present contribution. They concern the effect, on the overall efficiency, of an existing interfacial layer with optical properties different from those of the bulk and the spatial fluctuations in the potential barrier between the metal and the semiconductor.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117230964","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}
Annie C. J. Russell, C. Valdivia, Mandy R. Lewis, J. Haysom, K. Hinzer
Hourly and daily bifacial photovoltaic energy yields are calculated for a single-axis tracking system in Ottawa, ON. The proposed highly-parameterized, computationally-efficient model calculates detailed front and rear irradiance profiles allowing for the analysis of real-world shading losses due to PV panel racking. Annual energy yield calculations are also supported. Cloudy and clear day shading losses are found to increase linearly with torque tube radius for a single-tier (“1-up”) portrait configuration.
{"title":"Modelling Energy Yield Including Rack Shading for Single-Axis Tracked Bifacial Solar Panels","authors":"Annie C. J. Russell, C. Valdivia, Mandy R. Lewis, J. Haysom, K. Hinzer","doi":"10.1109/PN.2019.8819539","DOIUrl":"https://doi.org/10.1109/PN.2019.8819539","url":null,"abstract":"Hourly and daily bifacial photovoltaic energy yields are calculated for a single-axis tracking system in Ottawa, ON. The proposed highly-parameterized, computationally-efficient model calculates detailed front and rear irradiance profiles allowing for the analysis of real-world shading losses due to PV panel racking. Annual energy yield calculations are also supported. Cloudy and clear day shading losses are found to increase linearly with torque tube radius for a single-tier (“1-up”) portrait configuration.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129728440","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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