Pub Date : 2022-11-02DOI: 10.1080/01468030.2022.2150588
Jianqiang Hui, C. Gan, Xuefeng Liu, Nianfei Zhan
ABSTRACT In this paper, a dynamic bandwidth allocation (DBA) algorithm based on differentiated service cycle (DSC) in multiple service (multi-service) hybrid Virtual Passive Optical Network (VPON) is proposed. The DSC algorithm introduces neural network prediction and improves the polling mechanism between Optical Network Unit (ONU) and Optical Line Terminal (OLT). DSC can be applied to multi-service VPON scenarios. By introducing neural network, the problem that traditional prediction methods can only predict one polling cycle service traffic will be solved. By establishing the separation mechanism of report cycle and prediction cycle, the idle time in multi-wavelength VPON is eliminated, and the bandwidth consumption caused by a large number of REPORT messages is reduced. By proposing differentiated service cycle polling mechanism, the transmission delay of high priority service traffic caused by the simultaneous interpreting of multiple services in offline DBA algorithm can be reduced. Finally, by the simulation and analysis, the effectiveness of the proposed model is demonstrated.
{"title":"A Dynamic Bandwidth Allocation Algorithm Based on Differentiated Service Cycle in Multi-Service Hybrid VPON","authors":"Jianqiang Hui, C. Gan, Xuefeng Liu, Nianfei Zhan","doi":"10.1080/01468030.2022.2150588","DOIUrl":"https://doi.org/10.1080/01468030.2022.2150588","url":null,"abstract":"ABSTRACT In this paper, a dynamic bandwidth allocation (DBA) algorithm based on differentiated service cycle (DSC) in multiple service (multi-service) hybrid Virtual Passive Optical Network (VPON) is proposed. The DSC algorithm introduces neural network prediction and improves the polling mechanism between Optical Network Unit (ONU) and Optical Line Terminal (OLT). DSC can be applied to multi-service VPON scenarios. By introducing neural network, the problem that traditional prediction methods can only predict one polling cycle service traffic will be solved. By establishing the separation mechanism of report cycle and prediction cycle, the idle time in multi-wavelength VPON is eliminated, and the bandwidth consumption caused by a large number of REPORT messages is reduced. By proposing differentiated service cycle polling mechanism, the transmission delay of high priority service traffic caused by the simultaneous interpreting of multiple services in offline DBA algorithm can be reduced. Finally, by the simulation and analysis, the effectiveness of the proposed model is demonstrated.","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"92 1","pages":"113 - 130"},"PeriodicalIF":1.7,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84108612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-04DOI: 10.1080/01468030.2022.2145530
Jing Gao, J. Ma
ABSTRACT A photonic scheme for simultaneously measuring both the Doppler frequency shift (DFS) and angle of arrival (AOA) of a microwave signal based on a polarization division multiplexing dual-parallel Mach-Zehnder modulator (PDM-DPMZM) is proposed. In our scheme, the single-sideband (SSB) modulated signals via PDM-DPMZM are divided into two branches, and so two ac power-phase mapping functions with higher slopes are formed by different polarization processing. Since one ac power-phase curve serves as a calibration line, the system can realize unambiguous AOA measurement with the phase range of −180°~180°. The value and direction of DFS can only be determined using an electrical spectrum analyzer (ESA). In addition, the scheme has a larger operating bandwidth because no filter is required. Simulation results show that the AOA from −83.92° to 83.92° is measured with an error of ±0.9°, and the DFS measurement within ±100 KHz is realized with an error less than ±5 × 10−3 Hz. The characteristics of low error, high precision, and wide bandwidth are important for microwave signal detection.
{"title":"Simultaneous and Unambiguous Measurement for Doppler Frequency Shift and Angle of Arrival of a Microwave Signal with High Precision","authors":"Jing Gao, J. Ma","doi":"10.1080/01468030.2022.2145530","DOIUrl":"https://doi.org/10.1080/01468030.2022.2145530","url":null,"abstract":"ABSTRACT A photonic scheme for simultaneously measuring both the Doppler frequency shift (DFS) and angle of arrival (AOA) of a microwave signal based on a polarization division multiplexing dual-parallel Mach-Zehnder modulator (PDM-DPMZM) is proposed. In our scheme, the single-sideband (SSB) modulated signals via PDM-DPMZM are divided into two branches, and so two ac power-phase mapping functions with higher slopes are formed by different polarization processing. Since one ac power-phase curve serves as a calibration line, the system can realize unambiguous AOA measurement with the phase range of −180°~180°. The value and direction of DFS can only be determined using an electrical spectrum analyzer (ESA). In addition, the scheme has a larger operating bandwidth because no filter is required. Simulation results show that the AOA from −83.92° to 83.92° is measured with an error of ±0.9°, and the DFS measurement within ±100 KHz is realized with an error less than ±5 × 10−3 Hz. The characteristics of low error, high precision, and wide bandwidth are important for microwave signal detection.","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"128 1","pages":"96 - 112"},"PeriodicalIF":1.7,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82851560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT A slot microring resonator acoustic sensor (MRAS) using the PDMS package was proposed to achieve ultra-high sensitivity acoustic detection. The acoustic detection principle of the sensor is analyzed theoretically, the structural parameters are optimized and the performance of the sensor is verified by simulation. The simulation results show that the proposed slot MRAS has a high-quality factor of 1.49 × 106, the sensitivity of the sensor by intensity detection method is up to 3872 mV/kPa, and the 3 dB bandwidth is 210 MHz. The sensor designed in this paper has the advantages of ultra-high sensitivity and wide bandwidth range, which has important value in the field of acoustic detection.
{"title":"Design of Ultra-High Sensitivity Slot Micro-ring Resonator Acoustic Sensor","authors":"Xiaoxia Chu, Jiangong Cui, Min Zhu, Rongyu Zhao, Wendong Zhang, Guojun Zhang, Renxin Wang, Yuhua Yang, Yongfeng Ren","doi":"10.1080/01468030.2022.2145529","DOIUrl":"https://doi.org/10.1080/01468030.2022.2145529","url":null,"abstract":"ABSTRACT A slot microring resonator acoustic sensor (MRAS) using the PDMS package was proposed to achieve ultra-high sensitivity acoustic detection. The acoustic detection principle of the sensor is analyzed theoretically, the structural parameters are optimized and the performance of the sensor is verified by simulation. The simulation results show that the proposed slot MRAS has a high-quality factor of 1.49 × 106, the sensitivity of the sensor by intensity detection method is up to 3872 mV/kPa, and the 3 dB bandwidth is 210 MHz. The sensor designed in this paper has the advantages of ultra-high sensitivity and wide bandwidth range, which has important value in the field of acoustic detection.","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"445 1","pages":"83 - 95"},"PeriodicalIF":1.7,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78794916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-04DOI: 10.1080/01468030.2022.2111002
H. Hodara, P. Mock, E. Skaljo
ABSTRACT We review the latest developments in Fiber-optic Telecommunications and Networks presented at OFC 2022 and compare the progress accomplished since the previous year conference, OFC 2021. In particular, we note this year’s emphasis on the application of Neural Networks (NN) as part of Artificial Intelligence (AI) and Machine Learning (ML), as well as continued research in quantum communications and key distribution. We also expect future conferences to include papers about optical variants of quantum computers, a field of great interest that can exploit many quantum systems, as well as papers on continuing developments in High-Speed Communications beyond 800 Gb/s, and increased use of coherent modulation and detection in Data Centers Interconnect, Cloud and Edge computing, the latter in support of 5 G Internet Of Things (IOT).
{"title":"Review of OFC 2022 Optical Networks and Communications Conference Hybrid (Virtual/In-Person) Conference: 6–10 March 2022, San Diego, CA","authors":"H. Hodara, P. Mock, E. Skaljo","doi":"10.1080/01468030.2022.2111002","DOIUrl":"https://doi.org/10.1080/01468030.2022.2111002","url":null,"abstract":"ABSTRACT We review the latest developments in Fiber-optic Telecommunications and Networks presented at OFC 2022 and compare the progress accomplished since the previous year conference, OFC 2021. In particular, we note this year’s emphasis on the application of Neural Networks (NN) as part of Artificial Intelligence (AI) and Machine Learning (ML), as well as continued research in quantum communications and key distribution. We also expect future conferences to include papers about optical variants of quantum computers, a field of great interest that can exploit many quantum systems, as well as papers on continuing developments in High-Speed Communications beyond 800 Gb/s, and increased use of coherent modulation and detection in Data Centers Interconnect, Cloud and Edge computing, the latter in support of 5 G Internet Of Things (IOT).","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"41 1","pages":"63 - 82"},"PeriodicalIF":1.7,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82138458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1080/01468030.2022.2083532
A. Zhou, Huajie Wang, Yue Zhang, Chunyan Hu
ABSTRACT Nowadays, flexible organic light-emitting diodes (OLEDs) have been widely used in next-generation wearable electronics. Flexible electrodes, flexible substrates, and flexible encapsulation are indispensable components for the construction of flexible OLEDs. In this review, metal nanowires and graphene-based flexible electrodes, textile (fiber and fabric), novel polymer film-based flexible OLEDs, including the key process of planarization for flexible OLEDs fabrication on uneven surfaces are discussed. OLEDs cannot operate stably without encapsulation in an ambient atmosphere. Not only barrier performance but also mechanical properties are necessary for the encapsulation of flexible OLEDs. The encapsulation technologies for flexible OLEDs fabrication are also described.
{"title":"Recent Progress of Flexible OLEDs for Wearable Devices","authors":"A. Zhou, Huajie Wang, Yue Zhang, Chunyan Hu","doi":"10.1080/01468030.2022.2083532","DOIUrl":"https://doi.org/10.1080/01468030.2022.2083532","url":null,"abstract":"ABSTRACT Nowadays, flexible organic light-emitting diodes (OLEDs) have been widely used in next-generation wearable electronics. Flexible electrodes, flexible substrates, and flexible encapsulation are indispensable components for the construction of flexible OLEDs. In this review, metal nanowires and graphene-based flexible electrodes, textile (fiber and fabric), novel polymer film-based flexible OLEDs, including the key process of planarization for flexible OLEDs fabrication on uneven surfaces are discussed. OLEDs cannot operate stably without encapsulation in an ambient atmosphere. Not only barrier performance but also mechanical properties are necessary for the encapsulation of flexible OLEDs. The encapsulation technologies for flexible OLEDs fabrication are also described.","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"27 1","pages":"1 - 25"},"PeriodicalIF":1.7,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81632318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-25DOI: 10.1080/01468030.2022.2042626
Xiaojun Zhu, Wen Liu, Dan Sun, Guoan Zhang, Li Zou, Zhipeng Liang, Zhanghua Han, Yue-chun Shi
ABSTRACT We propose a high sensitive acoustic sensor based on a microfiber Mach-Zehnder interferometer (MMZI) with tapered polarization-maintaining fiber (PMF). The optical tapering technology is used to taper the PMF. Then, the MMZI is attached to a wood pulp diaphragm (WPD) to form an acoustic sensor, whose curvature will change with the vibration of the diaphragm. Two sensors with different waist diameters are made for performance comparison. Experimental results show that the acoustic sensor can achieve a wideband frequency response range from 200 Hz to 4000 Hz. The responses are flat at frequencies ranging from 200 Hz to 1500 Hz. Moreover, we find that the sensing performance of the acoustic sensor improves with the decrease in its waist diameter. When the waist diameter is 25.72 μm, the response sensitivity of the sensor can reach 42.4 mV/kPa at 2000 Hz, and the minimum detection pressure is 1.24 Pa/√Hz. It provides an effective way to fabricate an acoustic sensor, with low cost, easy integration, and high sensitivity.
{"title":"High-Sensitive Acoustic Sensor Based on Microfiber Mach–Zehnder Interferometer with Tapered Polarization-Maintaining Fiber","authors":"Xiaojun Zhu, Wen Liu, Dan Sun, Guoan Zhang, Li Zou, Zhipeng Liang, Zhanghua Han, Yue-chun Shi","doi":"10.1080/01468030.2022.2042626","DOIUrl":"https://doi.org/10.1080/01468030.2022.2042626","url":null,"abstract":"ABSTRACT We propose a high sensitive acoustic sensor based on a microfiber Mach-Zehnder interferometer (MMZI) with tapered polarization-maintaining fiber (PMF). The optical tapering technology is used to taper the PMF. Then, the MMZI is attached to a wood pulp diaphragm (WPD) to form an acoustic sensor, whose curvature will change with the vibration of the diaphragm. Two sensors with different waist diameters are made for performance comparison. Experimental results show that the acoustic sensor can achieve a wideband frequency response range from 200 Hz to 4000 Hz. The responses are flat at frequencies ranging from 200 Hz to 1500 Hz. Moreover, we find that the sensing performance of the acoustic sensor improves with the decrease in its waist diameter. When the waist diameter is 25.72 μm, the response sensitivity of the sensor can reach 42.4 mV/kPa at 2000 Hz, and the minimum detection pressure is 1.24 Pa/√Hz. It provides an effective way to fabricate an acoustic sensor, with low cost, easy integration, and high sensitivity.","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"8 1","pages":"41 - 61"},"PeriodicalIF":1.7,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78792728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-09DOI: 10.1080/01468030.2021.2018070
Y. Yap, W. Chong, S. A. Razgaleh, Nayming Huang, C. Ong, H. Ahmad
ABSTRACT Graphene is one of the most attractive two-dimensional nanomaterials widely used as saturable absorber for pulsing laser, owing to its unique non-linear optical responses. However, fabrication and integration of graphene saturable absorber into a laser cavity involves complex processes and procedures. Mass production of graphene-based saturable absorbers requires simplification of the fabrication process with minimum material wastage. Reduced graphene oxide, a functionalized graphene, is found to have saturable absorption property as well. Comparatively, it is easier and more cost-effective to produce. On the other hand, optical deposition is a saturable absorber deposition technique that maximizes material utilization. In this work, commercially available reduced graphene oxide in N-methyl-2-pyrrolidone was used to fabricate a saturable absorber device via optical deposition, due to its simplicity and high efficacy. Optical pulse generation via Q-switching were successfully demonstrated with the optically deposited rGO-SA incorporated into a ring erbium-doped fiber laser. Pulse repetition rate of up to ~85.0 kHz and pulse durations as short as ~2.0 μs were achieved. Its performance as a saturable absorber in a Q-switched fiber laser is then compared with previous works. Comparatively, optically deposited rGO has a much lower Q-switched threshold and holds huge potential for mass production with maximum material utilization.
{"title":"Performance of Q-Switched Fiber Laser Using Optically Deposited Reduced Graphene Oxide as Saturable Absorber","authors":"Y. Yap, W. Chong, S. A. Razgaleh, Nayming Huang, C. Ong, H. Ahmad","doi":"10.1080/01468030.2021.2018070","DOIUrl":"https://doi.org/10.1080/01468030.2021.2018070","url":null,"abstract":"ABSTRACT Graphene is one of the most attractive two-dimensional nanomaterials widely used as saturable absorber for pulsing laser, owing to its unique non-linear optical responses. However, fabrication and integration of graphene saturable absorber into a laser cavity involves complex processes and procedures. Mass production of graphene-based saturable absorbers requires simplification of the fabrication process with minimum material wastage. Reduced graphene oxide, a functionalized graphene, is found to have saturable absorption property as well. Comparatively, it is easier and more cost-effective to produce. On the other hand, optical deposition is a saturable absorber deposition technique that maximizes material utilization. In this work, commercially available reduced graphene oxide in N-methyl-2-pyrrolidone was used to fabricate a saturable absorber device via optical deposition, due to its simplicity and high efficacy. Optical pulse generation via Q-switching were successfully demonstrated with the optically deposited rGO-SA incorporated into a ring erbium-doped fiber laser. Pulse repetition rate of up to ~85.0 kHz and pulse durations as short as ~2.0 μs were achieved. Its performance as a saturable absorber in a Q-switched fiber laser is then compared with previous works. Comparatively, optically deposited rGO has a much lower Q-switched threshold and holds huge potential for mass production with maximum material utilization.","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"28 1","pages":"26 - 40"},"PeriodicalIF":1.7,"publicationDate":"2022-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82105947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-30DOI: 10.1080/01468030.2021.2005185
Mingwei Gao, Jianxin Ma
ABSTRACT
A linearization scheme for the microwave photonic link based on dual-parallel Mach–Zehnder modulator is proposed, which can suppress the third-order intermodulation distortion (IMD3) introduced by the nonlinearity of the electrooptical modulator and thus improve the spurious-free dynamic range (SFDR). By adjusting the optical power splitter, phase shifter, one of the three main factors that produce IMD3 can superimpose destructively with the other two. Theoretical analysis and simulation results show that our proposed scheme has a better electrical signal-to-interference ratio of 24.9 dB than the conventional scheme, and thus the SFDR has a 9 dB·Hz2/3 improvement. In addition, in the back-to-back system, the error vector magnitude of a 250-MSym/s 16-quadrature-amplitude-modulation is reduced to 2.98% in our proposed scheme compared with the conventional scheme of 14.17%.
{"title":"Suppression of third-order intermodulation distortion in analog photonic link based on dual-parallel Mach-Zehnder modulators","authors":"Mingwei Gao, Jianxin Ma","doi":"10.1080/01468030.2021.2005185","DOIUrl":"https://doi.org/10.1080/01468030.2021.2005185","url":null,"abstract":"<p><b>ABSTRACT</b></p><p>A linearization scheme for the microwave photonic link based on dual-parallel Mach–Zehnder modulator is proposed, which can suppress the third-order intermodulation distortion (IMD3) introduced by the nonlinearity of the electrooptical modulator and thus improve the spurious-free dynamic range (SFDR). By adjusting the optical power splitter, phase shifter, one of the three main factors that produce IMD3 can superimpose destructively with the other two. Theoretical analysis and simulation results show that our proposed scheme has a better electrical signal-to-interference ratio of 24.9 dB than the conventional scheme, and thus the SFDR has a 9 dB·Hz<sup>2/3</sup> improvement. In addition, in the back-to-back system, the error vector magnitude of a 250-MSym/s 16-quadrature-amplitude-modulation is reduced to 2.98% in our proposed scheme compared with the conventional scheme of 14.17%.</p>","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"33 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138508561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-12DOI: 10.1080/01468030.2021.2001878
Ş. Hayber, T. Tabaru, Mehmet Güçyetmez
Observing the transformer oil quality is essential for the transformer’s health and system. The aging state of the transformer oils and the average remaining life accordingly can be determined using the breakdown voltage (BDV) test, ultraviolet-visible (UV-Vis) spectroscopy, and the refractive index (RI) standard methods. The subject of this study is to design and manufacture a much simpler and low-cost, evanescent field absorptionbased fiber optic sensor (EFA-FOS) compatible with these proven standard methods and to perform a comparative performance analysis by determining a critical voltage threshold. Apart from the expensive and cumbersome standard methods mentioned above, the usability of the oil is carried out, thanks to the online sensor system, with the pretest using this critical voltage value. EFA-FOS measurement results of oil samples can determine the samples’ aging degree with high accuracy. The samples’ RI is determined with EFA-FOS with a sensitivity of −70 V/RIU and a linearity of 0.98 (R). A strong relationship has also been determined between the sensor output and measured BDV with a regression constant of 0.86 (R). ARTICLE HISTORY Received 30 April 2021 Accepted 31 October 2021
{"title":"Evanescent Field Absorption-Based Fiber Optic Sensor for Detecting Power Transformer Oil Degradation","authors":"Ş. Hayber, T. Tabaru, Mehmet Güçyetmez","doi":"10.1080/01468030.2021.2001878","DOIUrl":"https://doi.org/10.1080/01468030.2021.2001878","url":null,"abstract":"Observing the transformer oil quality is essential for the transformer’s health and system. The aging state of the transformer oils and the average remaining life accordingly can be determined using the breakdown voltage (BDV) test, ultraviolet-visible (UV-Vis) spectroscopy, and the refractive index (RI) standard methods. The subject of this study is to design and manufacture a much simpler and low-cost, evanescent field absorptionbased fiber optic sensor (EFA-FOS) compatible with these proven standard methods and to perform a comparative performance analysis by determining a critical voltage threshold. Apart from the expensive and cumbersome standard methods mentioned above, the usability of the oil is carried out, thanks to the online sensor system, with the pretest using this critical voltage value. EFA-FOS measurement results of oil samples can determine the samples’ aging degree with high accuracy. The samples’ RI is determined with EFA-FOS with a sensitivity of −70 V/RIU and a linearity of 0.98 (R). A strong relationship has also been determined between the sensor output and measured BDV with a regression constant of 0.86 (R). ARTICLE HISTORY Received 30 April 2021 Accepted 31 October 2021","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"98 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91180855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-02DOI: 10.1080/01468030.2021.2013657
H. Hodara, P. Mock, C. Slemon
ABSTRACT This is a detailed review of the latest developments presented at the last OFC 2921 virtual conference. The review covers: Game-Changing developments, specifically Hollow Core Fibers (HCF), Neural Networks (NN) Applications, and Quantum Key Distribution (QKD); and Incremental developments, in particular, Sensors and Data Centers, High-Speed Coherent Optics Transmission, with the latter’s emphasis on Optical Switching.
{"title":"Review of OFC 2021: The future of optical networks and communications. Virtual conference 6–10 June 2021","authors":"H. Hodara, P. Mock, C. Slemon","doi":"10.1080/01468030.2021.2013657","DOIUrl":"https://doi.org/10.1080/01468030.2021.2013657","url":null,"abstract":"ABSTRACT This is a detailed review of the latest developments presented at the last OFC 2921 virtual conference. The review covers: Game-Changing developments, specifically Hollow Core Fibers (HCF), Neural Networks (NN) Applications, and Quantum Key Distribution (QKD); and Incremental developments, in particular, Sensors and Data Centers, High-Speed Coherent Optics Transmission, with the latter’s emphasis on Optical Switching.","PeriodicalId":50449,"journal":{"name":"Fiber and Integrated Optics","volume":"35 1","pages":"185 - 228"},"PeriodicalIF":1.7,"publicationDate":"2021-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74816184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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