Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597986
J. Zhang, T. Srivastava, B. Yu, T. K. Sraw, A. Feng, W. Wang, X. Liu, C. Kaur, D. Sweeney, J. Pan, S. Patel, M. Z. Islam, R. Fedosejevs, M. Gupta, Y. Tsui, A. Sedgwick, A. Junaid
This study reports the development of a real time in situ analyzer for solids content measurement at different depths in oil sands tailings ponds. The analyzer uses an optical light scattering technique for the measurements and a low-level source (below license limits) gamma-ray transmission technique for in situ calibration. The technology has been successfully demonstrated at laboratory-scale, and a prototype is currently being developed for large-scale testing.
{"title":"In Situ Real Time Measurement of Solids Content Using Hybrid Optical and Gamma-Ray Techniques for Tailings Management","authors":"J. Zhang, T. Srivastava, B. Yu, T. K. Sraw, A. Feng, W. Wang, X. Liu, C. Kaur, D. Sweeney, J. Pan, S. Patel, M. Z. Islam, R. Fedosejevs, M. Gupta, Y. Tsui, A. Sedgwick, A. Junaid","doi":"10.1109/PN52152.2021.9597986","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597986","url":null,"abstract":"This study reports the development of a real time in situ analyzer for solids content measurement at different depths in oil sands tailings ponds. The analyzer uses an optical light scattering technique for the measurements and a low-level source (below license limits) gamma-ray transmission technique for in situ calibration. The technology has been successfully demonstrated at laboratory-scale, and a prototype is currently being developed for large-scale testing.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"73 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86043135","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 compact, and low cost CW 561 nm diode pumped solid state (DPSS) yellow laser is proposed and discussed. The laser was built upon an Nd:YAG crystal and an MgO:PPLN crystal as the nonlinear medium. The advantages of MgO:PPLN as well as the stability of the laser and physical origins of the observed effects are discussed.
{"title":"Study on the stability of 561 nm diode-pumped solid state lasers","authors":"Tyler Kashak, Bing-qiang Zhang, Qianli Ma, Chang-Qing Xu, Stewart Clark, Meenu Kajal","doi":"10.1109/PN52152.2021.9597952","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597952","url":null,"abstract":"A compact, and low cost CW 561 nm diode pumped solid state (DPSS) yellow laser is proposed and discussed. The laser was built upon an Nd:YAG crystal and an MgO:PPLN crystal as the nonlinear medium. The advantages of MgO:PPLN as well as the stability of the laser and physical origins of the observed effects are discussed.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"9 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90666070","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 : 2021-05-31DOI: 10.1109/PN52152.2021.9597944
Lakshmi Narayanan Venktasubramani, Rekha Yadav, R. D. Koilpillai, D. Venkitesh
We study the effect of receiver IQ skew in the 448 Gbps PM-16QAM system employing a joint equalizer for polarization demultiplexing, IQ gain and phase imbalance and carrier recovery with a modified widely linear adaptive filter. Through numerical simulations, we show the performance of the joint equalizer algorithm is within the standard HD-FEC limit of 3.8 x 10−3 BER at an OSNR of 24 dB and skew tolerance upto ~ 70% of symbol duration.
在448 Gbps PM-16QAM系统中，采用联合均衡器进行极化解复用、IQ增益和相位不平衡，并采用改进的宽线性自适应滤波器进行载波恢复，研究了接收机IQ偏斜对系统的影响。通过数值模拟，我们表明联合均衡器算法的性能在标准HD-FEC极限3.8 x 10−3误码率范围内，OSNR为24 dB，歪斜容限高达符号持续时间的70%。
{"title":"IQ Skew Tolerance Study of Modified Widely Linear Filter in 400 Gbps PM-16QAM System","authors":"Lakshmi Narayanan Venktasubramani, Rekha Yadav, R. D. Koilpillai, D. Venkitesh","doi":"10.1109/PN52152.2021.9597944","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597944","url":null,"abstract":"We study the effect of receiver IQ skew in the 448 Gbps PM-16QAM system employing a joint equalizer for polarization demultiplexing, IQ gain and phase imbalance and carrier recovery with a modified widely linear adaptive filter. Through numerical simulations, we show the performance of the joint equalizer algorithm is within the standard HD-FEC limit of 3.8 x 10−3 BER at an OSNR of 24 dB and skew tolerance upto ~ 70% of symbol duration.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"1 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90707830","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 : 2021-05-31DOI: 10.1109/PN52152.2021.9597954
R. Akbari, X. Xu, J. Xu, K. Fedorova, G. Sokolovskii, E. Rafailov, A. Major
Dual-wavelength operation of a Nd:CALGO laser with conically refracted output using an intracavity conerefringent element was demonstrated. The laser delivered >100 mW of output power and dual-wavelength operation of conically refracted laser was possible due to the broad gain bandwidth of the laser crystal.
{"title":"Multi-wavelength conical refraction laser","authors":"R. Akbari, X. Xu, J. Xu, K. Fedorova, G. Sokolovskii, E. Rafailov, A. Major","doi":"10.1109/PN52152.2021.9597954","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597954","url":null,"abstract":"Dual-wavelength operation of a Nd:CALGO laser with conically refracted output using an intracavity conerefringent element was demonstrated. The laser delivered >100 mW of output power and dual-wavelength operation of conically refracted laser was possible due to the broad gain bandwidth of the laser crystal.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"20 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73326554","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 : 2021-05-31DOI: 10.1109/PN52152.2021.9597913
S. Samadi, S. Narayanswamy, J. Dargahi, M. Mohazzab
There is considerable interest in ultra-broadband and high-resolution OCT designs for cellular structures of biological tissue to diagnose diseases. Spectral-domain spectrometers are of great interest suggested for such applications. This work describes a new spectrometer based on Grism with improved Strehl ratio, spectral linearity, and aberrations.
{"title":"Design of a linear K-Space Spectrometer with GRISM for Line Scanning Optical Coherence Tomography","authors":"S. Samadi, S. Narayanswamy, J. Dargahi, M. Mohazzab","doi":"10.1109/PN52152.2021.9597913","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597913","url":null,"abstract":"There is considerable interest in ultra-broadband and high-resolution OCT designs for cellular structures of biological tissue to diagnose diseases. Spectral-domain spectrometers are of great interest suggested for such applications. This work describes a new spectrometer based on Grism with improved Strehl ratio, spectral linearity, and aberrations.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"17 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72680273","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 : 2021-05-31DOI: 10.1109/PN52152.2021.9597897
Macaulay Harvey, R. Cisek, D. Tokarz
An investigation of nonlinear optical effects in a photonic crystal fiber was performed to obtain spectral broadening of 1030 nm and 250 fs duration pulses. The effect of fiber length was investigated at different pulse energies and durations. Spectral broadening of 230 nm was achieved with a pulse energy of 218 nJ.
{"title":"Spectral Broadening of Ultrashort Pulses by Nonlinear Optical Effects in Photonic Crystal Fiber","authors":"Macaulay Harvey, R. Cisek, D. Tokarz","doi":"10.1109/PN52152.2021.9597897","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597897","url":null,"abstract":"An investigation of nonlinear optical effects in a photonic crystal fiber was performed to obtain spectral broadening of 1030 nm and 250 fs duration pulses. The effect of fiber length was investigated at different pulse energies and durations. Spectral broadening of 230 nm was achieved with a pulse energy of 218 nJ.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"40 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77536370","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 : 2021-05-31DOI: 10.1109/PN52152.2021.9597965
Shiva Kumar
Various types of optical backpropagation (OBP) schemes for dispersion and nonlinearity compensation of fiber optic systems are reviewed. The OBP based on bidirectional Raman pumping is found to be the best choice.
{"title":"Optical Back Propagation For Fiber Optic Communication Systems","authors":"Shiva Kumar","doi":"10.1109/PN52152.2021.9597965","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597965","url":null,"abstract":"Various types of optical backpropagation (OBP) schemes for dispersion and nonlinearity compensation of fiber optic systems are reviewed. The OBP based on bidirectional Raman pumping is found to be the best choice.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"5 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76409825","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 : 2021-05-31DOI: 10.1109/PN52152.2021.9597972
Seyed Morteza Ebadi, Jonas Örtegren
We report the design and numerical results of a miniaturized and efficient plasmonic cut-off filter that is based on stepped impedance resonators and operates at telecom wavelengths.
本文报道了一种基于阶跃阻抗谐振器的小型高效等离子体截止滤波器的设计和数值结果。
{"title":"An Extremely Efficient and Compact Long-Wavelength Cut-Off Plasmonic Filter based on Stepped Impedance Resonators","authors":"Seyed Morteza Ebadi, Jonas Örtegren","doi":"10.1109/PN52152.2021.9597972","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597972","url":null,"abstract":"We report the design and numerical results of a miniaturized and efficient plasmonic cut-off filter that is based on stepped impedance resonators and operates at telecom wavelengths.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"42 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80506784","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 : 2021-05-31DOI: 10.1109/PN52152.2021.9597918
M. Abouelatta, Muhammad A. Othman, M. Desouky, A. Mahmoud, M. Swillam
We theoretically propose Si based concentric tubes meta material absorber, comprised from consecutive concentric tubes of intrinsic Si and doped Si (D-Si) layers. Our proposed structure exhibits broadband performance within the mid IR wavelength range extending from 3 to 7 μm with an absorption more than 0.89 in case of S-polarized incident light. The proposed design reveals new avenues to realize Si/D-Si concentric tubes metamaterial absorber for mid IR photo detection and mid IR thermal harvesting applications.
{"title":"Study of the Absorption Spectrum in Mid-IR Range Using Concentric Tubes Metamaterial Structures","authors":"M. Abouelatta, Muhammad A. Othman, M. Desouky, A. Mahmoud, M. Swillam","doi":"10.1109/PN52152.2021.9597918","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597918","url":null,"abstract":"We theoretically propose Si based concentric tubes meta material absorber, comprised from consecutive concentric tubes of intrinsic Si and doped Si (D-Si) layers. Our proposed structure exhibits broadband performance within the mid IR wavelength range extending from 3 to 7 μm with an absorption more than 0.89 in case of S-polarized incident light. The proposed design reveals new avenues to realize Si/D-Si concentric tubes metamaterial absorber for mid IR photo detection and mid IR thermal harvesting applications.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"14 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82447112","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 : 2021-05-31DOI: 10.1109/PN52152.2021.9597915
A. Degtyarev, M. Dubinin, O. Gurin, V. Maslov, K. Muntean, V. Ryabyh, V. Senyuta
The possibility for changing the parameters of the focal region of tightly focused laser beams excited by the modes of resonator of a THz laser based on a hollow circular dielectric waveguide was studied theoretically and experimentally. In the experiment, the focusing system was a short-focus lens with the central region covered by absorbing masks. The focal area parameters were changed by varying the size of the masks. The electric field components of the modes under study were theoretically calculated using the integral Rayleigh-Sommerfeld transformations under the non-paraxial approximation. The use of absorbing masks made it possible to reduce the beam diameter in the focal region and increase the depth of focus of the linearly polarized EH11-mode and azimuthally polarized TE01-mode.
{"title":"Control of Focused Laser Beams with Different Spatial Polarization","authors":"A. Degtyarev, M. Dubinin, O. Gurin, V. Maslov, K. Muntean, V. Ryabyh, V. Senyuta","doi":"10.1109/PN52152.2021.9597915","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597915","url":null,"abstract":"The possibility for changing the parameters of the focal region of tightly focused laser beams excited by the modes of resonator of a THz laser based on a hollow circular dielectric waveguide was studied theoretically and experimentally. In the experiment, the focusing system was a short-focus lens with the central region covered by absorbing masks. The focal area parameters were changed by varying the size of the masks. The electric field components of the modes under study were theoretically calculated using the integral Rayleigh-Sommerfeld transformations under the non-paraxial approximation. The use of absorbing masks made it possible to reduce the beam diameter in the focal region and increase the depth of focus of the linearly polarized EH11-mode and azimuthally polarized TE01-mode.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"39 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89867706","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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