We propose an off-axis digital holographic microscope in transmission mode using femtosecond laser source for low coherent noise phase imaging.
提出了一种利用飞秒激光源进行低相干噪声相位成像的传输模式离轴数字全息显微镜。
{"title":"Digital Holographic Microscope Using Femtosecond Laser Source for Live Cell Imaging","authors":"Lijo Thomas, E. Bélanger, P. Marquet","doi":"10.1109/PN.2019.8819582","DOIUrl":"https://doi.org/10.1109/PN.2019.8819582","url":null,"abstract":"We propose an off-axis digital holographic microscope in transmission mode using femtosecond laser source for low coherent noise phase imaging.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"201 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":"134455194","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 present a cladding-pumped laser setup composed only of femtosecond-written FBG components and that is made of an Er-doped fiber. Among those components, a pump reflector with a 71% reflectivity is written in the pure silica cladding of the fiber.
{"title":"Femtosecond laser written FBG components for all fiber laser development","authors":"L. Talbot, T. Boilard, M. Bernier","doi":"10.1109/PN.2019.8819530","DOIUrl":"https://doi.org/10.1109/PN.2019.8819530","url":null,"abstract":"We present a cladding-pumped laser setup composed only of femtosecond-written FBG components and that is made of an Er-doped fiber. Among those components, a pump reflector with a 71% reflectivity is written in the pure silica cladding of the fiber.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"46 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":"134036864","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}
Homa Jafari Dinani, Pegah Eslami, F. Mortazaeinezhad, R. Ghahrizjani
Around the world, a vast variety of plants abounds, but it is still difficult for scientists to conduct rigorous research in this field due to the regional nature of these plants. Iran is the source of one of such plants: Kelussia odoratissima, which has recently entered the pharmacopeia. Kelussia odoratissima is an extremely useful medicinal plant that is, unfortunately, an endangered species in Iran. This study aims at measuring the growth indices under experimental conditions with cocopeat and vermicompost media with nutritious fertilizers NPK (100:20:150) ppm and laser. The seeds were separated into four distinct groups: first, cooling with the seeds; second, submerged in 1500 ppm hormones gibberellin; third, exposure to a laser with a wavelength of 650 nm for 15 min; fourth, both 1500 ppm gibberellin and laser. Each condition was inspected on four different levels of rich cocopeat with vermicompost 10%, 20%, or 30%. In each group of treatment, the medium cocopeat without vermicompost and nutrition was considered as the control treatment, with the hope of both saving and cultivating this precious plant. The experiment took roughly seven months, with the plantlet not only kept alive and stable but with superior characteristics compared to natural media and growth conditions. The results show that the best growth conditions are as follows; a laser with gibberellin hormone plus 30 percent vermicompost and NPK (100:20:150) ppm fertilizer. This improves growth indices such as the wet weight of both plantlet and root, the dry weight of both plantlet and root, and the length of both plantlet and root.
{"title":"Effects of Laser Radiation on the Growth Indicators of Kelussia Odoratissima Mozaff. Medical Plant","authors":"Homa Jafari Dinani, Pegah Eslami, F. Mortazaeinezhad, R. Ghahrizjani","doi":"10.1109/PN.2019.8819599","DOIUrl":"https://doi.org/10.1109/PN.2019.8819599","url":null,"abstract":"Around the world, a vast variety of plants abounds, but it is still difficult for scientists to conduct rigorous research in this field due to the regional nature of these plants. Iran is the source of one of such plants: Kelussia odoratissima, which has recently entered the pharmacopeia. Kelussia odoratissima is an extremely useful medicinal plant that is, unfortunately, an endangered species in Iran. This study aims at measuring the growth indices under experimental conditions with cocopeat and vermicompost media with nutritious fertilizers NPK (100:20:150) ppm and laser. The seeds were separated into four distinct groups: first, cooling with the seeds; second, submerged in 1500 ppm hormones gibberellin; third, exposure to a laser with a wavelength of 650 nm for 15 min; fourth, both 1500 ppm gibberellin and laser. Each condition was inspected on four different levels of rich cocopeat with vermicompost 10%, 20%, or 30%. In each group of treatment, the medium cocopeat without vermicompost and nutrition was considered as the control treatment, with the hope of both saving and cultivating this precious plant. The experiment took roughly seven months, with the plantlet not only kept alive and stable but with superior characteristics compared to natural media and growth conditions. The results show that the best growth conditions are as follows; a laser with gibberellin hormone plus 30 percent vermicompost and NPK (100:20:150) ppm fertilizer. This improves growth indices such as the wet weight of both plantlet and root, the dry weight of both plantlet and root, and the length of both plantlet and root.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"16 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":"122410529","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. Beattie, M. Wilkins, M. C. Tam, C. Valdivia, Z. Wasilewski
Development of a photonic power converter for operation at 1310 nm would enable long distance optical power transfer over fiber. InAlGaAs lattice-matched to InP may be used as the absorber material in such a device. Material properties of InAlGaAs grown by molecular beam epitaxy (MBE) are studied by techniques including electro- and photoluminescence, spectroscopic ellipsometry, and quantum efficiency.
{"title":"Optical Characterization of InAlGaAs on InP for Monochromatic Photonic Power Conversion","authors":"M. Beattie, M. Wilkins, M. C. Tam, C. Valdivia, Z. Wasilewski","doi":"10.1109/PN.2019.8819522","DOIUrl":"https://doi.org/10.1109/PN.2019.8819522","url":null,"abstract":"Development of a photonic power converter for operation at 1310 nm would enable long distance optical power transfer over fiber. InAlGaAs lattice-matched to InP may be used as the absorber material in such a device. Material properties of InAlGaAs grown by molecular beam epitaxy (MBE) are studied by techniques including electro- and photoluminescence, spectroscopic ellipsometry, and quantum efficiency.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"71 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":"129130028","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}
Y. E. Monfared, R. Khosravi, M. Hajati, B. Kacerovská, P. Ma, C. Liang
We propose a new design of a highly birefringent photonic crystal fiber (HBPCF) via infiltration of two holes adjacent to the core of the fiber with two different liquids. As the refractive index of liquids is sensitive to temperature variations, the proposed HBPCF can be used in a Sagnac interferometer as a highly sensitive temperature sensor. The proposed HBPCF can show birefringence of $4 times 10$ and birefringence sensitivity of 25% for a 5○c temperature variation around 25○c which corresponds to a sensitivity of around 10 nm/○c.
{"title":"Sensitive Temperature Sensors based on High Birefringence Liquid-Filled Photonic Crystal Fibers","authors":"Y. E. Monfared, R. Khosravi, M. Hajati, B. Kacerovská, P. Ma, C. Liang","doi":"10.1109/PN.2019.8819520","DOIUrl":"https://doi.org/10.1109/PN.2019.8819520","url":null,"abstract":"We propose a new design of a highly birefringent photonic crystal fiber (HBPCF) via infiltration of two holes adjacent to the core of the fiber with two different liquids. As the refractive index of liquids is sensitive to temperature variations, the proposed HBPCF can be used in a Sagnac interferometer as a highly sensitive temperature sensor. The proposed HBPCF can show birefringence of $4 times 10$ and birefringence sensitivity of 25% for a 5○c temperature variation around 25○c which corresponds to a sensitivity of around 10 nm/○c.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"91 6 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":"126182709","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}
G. Forcade, C. Valdivia, Philipe St-Pierre, M. Darnon, K. Hinzer
We optimize a nanostructured surface derived from glass microbeads to maximize the acceptance angle of concentrated photovoltaic (CPV) systems. Rigorous coupled wave analysis computes the transmission/scattering of the subwavelength structure, which we then couple to a ray tracing analysis to simulate the entire CPV system. We find that beads with a radius of 400-500nm demonstrate the lowest solarweighted reflectance over a wide range of incidence angles.
{"title":"Modeling the Incorporation of Microbeads into Concentrator Photovoltaic Systems","authors":"G. Forcade, C. Valdivia, Philipe St-Pierre, M. Darnon, K. Hinzer","doi":"10.1109/PN.2019.8819537","DOIUrl":"https://doi.org/10.1109/PN.2019.8819537","url":null,"abstract":"We optimize a nanostructured surface derived from glass microbeads to maximize the acceptance angle of concentrated photovoltaic (CPV) systems. Rigorous coupled wave analysis computes the transmission/scattering of the subwavelength structure, which we then couple to a ray tracing analysis to simulate the entire CPV system. We find that beads with a radius of 400-500nm demonstrate the lowest solarweighted reflectance over a wide range of incidence angles.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"156 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":"121971390","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}
The wettability is an imperative surface property playing a critical role in regulating the physiological important processes such as protein adsorption, cell adhesion, and proliferation of the biomaterials such as titanium [1], [2] and eventually improving their outcome. In the present study, the mechanism underlying the wetting transition of the femtosecond laser generated periodic surface structures on titanium was systematically assessed by analyzing their surface chemical compositions as a function of time by X-ray photoelectron spectroscopy along with static water contact angle measurements.
{"title":"Insights into the Superhydrophilic to Superhydrophobic Transition of Femtosecond Laser-Induced Periodic Surface Structures on Titanium under Ambient Conditions","authors":"Hourieh Exir, A. Weck","doi":"10.1109/PN.2019.8819588","DOIUrl":"https://doi.org/10.1109/PN.2019.8819588","url":null,"abstract":"The wettability is an imperative surface property playing a critical role in regulating the physiological important processes such as protein adsorption, cell adhesion, and proliferation of the biomaterials such as titanium [1], [2] and eventually improving their outcome. In the present study, the mechanism underlying the wetting transition of the femtosecond laser generated periodic surface structures on titanium was systematically assessed by analyzing their surface chemical compositions as a function of time by X-ray photoelectron spectroscopy along with static water contact angle measurements.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"22 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":"131465010","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}
In this work we analyze nonlinear optical properties of the two organic materials (Indigo carmine dye and phenol red Ph indicator). Z-Scan technique was used to obtain nonlinear refractive index and we found that the order is of 10-9 - 10-10 (cm2/W).
{"title":"Study of nonlinear optical refractive index in thin films formed by bloom gelatin and organic materials : (Indigo carmine dye and phenol red Ph indicator)","authors":"G. Argüello-Sarmiento, E. Alvarado-Mendez","doi":"10.1109/PN.2019.8819514","DOIUrl":"https://doi.org/10.1109/PN.2019.8819514","url":null,"abstract":"In this work we analyze nonlinear optical properties of the two organic materials (Indigo carmine dye and phenol red Ph indicator). Z-Scan technique was used to obtain nonlinear refractive index and we found that the order is of 10<sup>-9</sup> - 10<sup>-10</sup> (cm<sup>2</sup>/W).","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"34 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":"126286131","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}
Bifacial silicon heterojunction solar cells are modelled via 2D optoelectronic simulations in Synopsys TCAD Sentaurus to optimize and characterize cell performance in regions of high latitude with high average air mass and increased angles of incidence. Device structure, such as amorphous silicon layer thickness and doping, is being optimized for bifacial illumination conditions representative of the Canadian High Arctic, with independent spectra illuminating the front and rear faces of the cell. The present cell structure has an efficiency of 20.3% under front-face illumination with AM1.5G. Cell performance will be optimized via improvements in the antireflection coating, surface texturing, doping, and layer thicknesses.
{"title":"Optimizing Bifacial Silicon Heterojunction Solar Cells for High-Latitude","authors":"E. Tonita, Mandy R. Lewis, C. Valdivia, K. Hinzer","doi":"10.1109/PN.2019.8819568","DOIUrl":"https://doi.org/10.1109/PN.2019.8819568","url":null,"abstract":"Bifacial silicon heterojunction solar cells are modelled via 2D optoelectronic simulations in Synopsys TCAD Sentaurus to optimize and characterize cell performance in regions of high latitude with high average air mass and increased angles of incidence. Device structure, such as amorphous silicon layer thickness and doping, is being optimized for bifacial illumination conditions representative of the Canadian High Arctic, with independent spectra illuminating the front and rear faces of the cell. The present cell structure has an efficiency of 20.3% under front-face illumination with AM1.5G. Cell performance will be optimized via improvements in the antireflection coating, surface texturing, doping, and layer thicknesses.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"209 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":"134227262","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 controllable continuous-wave dualwavelength laser operation of a Nd:GdVO/Nd:YVO composite crystal at 1063 & 1064 nm with in-band diode pumping around 912 nm. The laser produced a maximum output power of >4 with an optical efficiency of >38% and slope efficiency of >43%.
{"title":"In-band pumped composite Nd:YVO/Nd:GVO laser","authors":"M. Nadimi, C. Onyenekwu, A. Major","doi":"10.1109/PN.2019.8819525","DOIUrl":"https://doi.org/10.1109/PN.2019.8819525","url":null,"abstract":"We report on the controllable continuous-wave dualwavelength laser operation of a Nd:GdVO/Nd:YVO composite crystal at 1063 & 1064 nm with in-band diode pumping around 912 nm. The laser produced a maximum output power of >4 with an optical efficiency of >38% and slope efficiency of >43%.","PeriodicalId":448071,"journal":{"name":"2019 Photonics North (PN)","volume":"66 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":"132836569","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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