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/PN52152.2021.9597913
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/PN52152.2021.9597954
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/PN52152.2021.9597965
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/PN52152.2021.9597943
Zhenguo Lu, Jiaren Liu, Y. Mao, Guocheng Liu, P. Poole, P. Barrios, M. Rahim, G. Pakulski, Weihong Jiang, D. Poitras, Chunying Song, M. Vachon, J. Weber, Shurui Wang, P. Zhao, C. Storey, K. Zeb, Xiupu Zhang, J. Yao, K. Wu
In order to achieve ultrahigh data capacity and to overcome the wireless spectrum crunch, 5G is going to adopt millimeter-wave (mmW) frequencies (30 GHz - 300 GHz). To generate high-quality mm W signals by lasers, it requires optical sources with ultra-narrow optical linewidth and low relative intensity noise (RIN). In this paper, we have developed InAs/InP quantum dot (QD) multi-wavelength lasers (MWLs) around 1550 nm with the frequency spacing from 10 GHz to 1000 GHz. Those QD MWLs have very low RIN, ultra-narrow optical linewidth, small timing jitters, compact size, low power consumption and the ability for hybrid integration with silicon substrates. As an example, we present a buried heterostructure (BH) QD dual-wavelength (DW) DFB laser as an optical beat source for mmW generation. The BH QD DW-DFB laser with the optical linewidth of 16 KHz and the RIN of -158 dB/Hz is capable of generating spectrally pure mm W signals between 46 GHz and 48 GHz. By using it, we have demonstrated a real time 24-Gbit/s (64QAM x 4Gbaud) data bandwidth wireless transmission operating at 47.2-GHz carrier over 25-km SSMF.
{"title":"Quantum-Dot Multi-Wavelength Lasers for Millimeter Wave Generation and Transmission","authors":"Zhenguo Lu, Jiaren Liu, Y. Mao, Guocheng Liu, P. Poole, P. Barrios, M. Rahim, G. Pakulski, Weihong Jiang, D. Poitras, Chunying Song, M. Vachon, J. Weber, Shurui Wang, P. Zhao, C. Storey, K. Zeb, Xiupu Zhang, J. Yao, K. Wu","doi":"10.1109/PN52152.2021.9597943","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597943","url":null,"abstract":"In order to achieve ultrahigh data capacity and to overcome the wireless spectrum crunch, 5G is going to adopt millimeter-wave (mmW) frequencies (30 GHz - 300 GHz). To generate high-quality mm W signals by lasers, it requires optical sources with ultra-narrow optical linewidth and low relative intensity noise (RIN). In this paper, we have developed InAs/InP quantum dot (QD) multi-wavelength lasers (MWLs) around 1550 nm with the frequency spacing from 10 GHz to 1000 GHz. Those QD MWLs have very low RIN, ultra-narrow optical linewidth, small timing jitters, compact size, low power consumption and the ability for hybrid integration with silicon substrates. As an example, we present a buried heterostructure (BH) QD dual-wavelength (DW) DFB laser as an optical beat source for mmW generation. The BH QD DW-DFB laser with the optical linewidth of 16 KHz and the RIN of -158 dB/Hz is capable of generating spectrally pure mm W signals between 46 GHz and 48 GHz. By using it, we have demonstrated a real time 24-Gbit/s (64QAM x 4Gbaud) data bandwidth wireless transmission operating at 47.2-GHz carrier over 25-km SSMF.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"137 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":"79759143","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/PN52152.2021.9597927
R. Shrestha, H. Guerboukha, J. Neronha, O. Ryan, M. Hornbuckle, Z. Fang, D. Mittleman
We study the radiation properties of conventional rectangular slots for leaky-wave antennas at terahertz frequencies. We introduce a novel trapezoidal aperture design that increase the efficiency and directionality of the generated beams for THz communications.
{"title":"Highly Directional Antennas for Terahertz Communications","authors":"R. Shrestha, H. Guerboukha, J. Neronha, O. Ryan, M. Hornbuckle, Z. Fang, D. Mittleman","doi":"10.1109/PN52152.2021.9597927","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597927","url":null,"abstract":"We study the radiation properties of conventional rectangular slots for leaky-wave antennas at terahertz frequencies. We introduce a novel trapezoidal aperture design that increase the efficiency and directionality of the generated beams for THz communications.","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":"83000699","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/PN52152.2021.9597953
S. Schaefer, Ras-Jeevan K. Obhi, C. Valdivia, K. Hinzer, P. Poole, Jiaren Liu, Zhenguo Lu
As quantum dash laser designs gain technological maturity, there is a need to investigate performance limiting factors. We simulate monolithic ridge waveguide quantum dash (QDash) and quantum well (QW) lasers in the InGaAsP/InP-system to investigate the mechanisms limiting device performance at elevated temperatures. Our findings are compared to experimental data obtained for representative devices. We quantify dominant loss mechanisms as a function of injection current density at different temperatures and compare results for QW and QDash structures. We find a variation in relative loss contribution between devices. At higher temperatures we find Auger recombination emerging as the dominant loss mechanism.
{"title":"Quantifying Loss Mechanisms in InGaAsP/InP Quantum Dash and Quantum Well Lasers","authors":"S. Schaefer, Ras-Jeevan K. Obhi, C. Valdivia, K. Hinzer, P. Poole, Jiaren Liu, Zhenguo Lu","doi":"10.1109/PN52152.2021.9597953","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597953","url":null,"abstract":"As quantum dash laser designs gain technological maturity, there is a need to investigate performance limiting factors. We simulate monolithic ridge waveguide quantum dash (QDash) and quantum well (QW) lasers in the InGaAsP/InP-system to investigate the mechanisms limiting device performance at elevated temperatures. Our findings are compared to experimental data obtained for representative devices. We quantify dominant loss mechanisms as a function of injection current density at different temperatures and compare results for QW and QDash structures. We find a variation in relative loss contribution between devices. At higher temperatures we find Auger recombination emerging as the dominant loss mechanism.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"4 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":"87948291","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/PN52152.2021.9597993
B. Galarreta, Yulán Hernández, Lorena Veliz, Mary Licuona, S. Córdova, Angeline S. Saldaña
Label-free SERS and LSPR gold nanosensors were developed for selective determination of mycotoxin content in grains and cereals down to ppb level. In this work, we discussed the results obtained in the development of these accessible assays.
{"title":"Plasmonic nanosensors for food mycotoxin screening: Developing safety assays for toxin detection and control in grains and cereals","authors":"B. Galarreta, Yulán Hernández, Lorena Veliz, Mary Licuona, S. Córdova, Angeline S. Saldaña","doi":"10.1109/PN52152.2021.9597993","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597993","url":null,"abstract":"Label-free SERS and LSPR gold nanosensors were developed for selective determination of mycotoxin content in grains and cereals down to ppb level. In this work, we discussed the results obtained in the development of these accessible assays.","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":"89682802","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/PN52152.2021.9598002
Tarni Aggarwal, S. Ganguly, D. Saha
Sub-bandgap states in GaN-based quantum confined structures are not always disadvantageous for efficient light emission. A novel intrinsic mechanism of carrier recovery from sub-bandgap states through Coulombic interaction is proven. Indium inhomogeneity is established as carrier reservoirs that can hold carriers for future recombination. There is a finite probability of electron de-trapping from these states, instead of recombining through opposite charge.
{"title":"Carrier De-trapping from the Sub-bandgap States: A novel mechanism in InGaN/GaN systems manifested by ultrafast pump-probe spectroscopy","authors":"Tarni Aggarwal, S. Ganguly, D. Saha","doi":"10.1109/PN52152.2021.9598002","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9598002","url":null,"abstract":"Sub-bandgap states in GaN-based quantum confined structures are not always disadvantageous for efficient light emission. A novel intrinsic mechanism of carrier recovery from sub-bandgap states through Coulombic interaction is proven. Indium inhomogeneity is established as carrier reservoirs that can hold carriers for future recombination. There is a finite probability of electron de-trapping from these states, instead of recombining through opposite charge.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"38 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":"77016470","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/PN52152.2021.9597940
Robi Kormokar, Md Hosne Mobarok Shamim, M. Rochette
We derive an analytical formulation of Raman-induced frequency shift experienced by a soliton. The resulting formulation is a high-order extension of Gordon's formula for soliton self-frequency shift that includes propagation losses, self-steepening, and dispersion slope.
{"title":"Soliton Self-Frequency Shift of High-Order","authors":"Robi Kormokar, Md Hosne Mobarok Shamim, M. Rochette","doi":"10.1109/PN52152.2021.9597940","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597940","url":null,"abstract":"We derive an analytical formulation of Raman-induced frequency shift experienced by a soliton. The resulting formulation is a high-order extension of Gordon's formula for soliton self-frequency shift that includes propagation losses, self-steepening, and dispersion slope.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"48 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":"73627288","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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