Pub Date : 2019-12-01DOI: 10.1109/ICTP48844.2019.9041698
Mohammad Ali Kawser, H. Nyeem
While a higher embedding capacity of an RDH scheme is a timely need for the recent imaging-based applications, it proportionately degrades the visual quality of an embedded image. Existing RDH schemes have no separate consideration of improving the embedded image quality. This paper presents a new approach to improving the embedded image quality for a high capacity RDH scheme by utilizing a simple 2k -bit correction. A Pixel-Repetition (PR) is used to create an image block of 2 × 2 size for each of the original pixel (that we call a seed) of the image. Unlike the previous PR-based schemes, the embedding conditions are redefined to regenerate the seed pixel from the other 2 pixels of the block to embed additional k-bits in the seed pixel and apply the 2k -bit correction to ensure a better-embedded image quality. The preliminary results demonstrate that the proposed pixel correction significantly improves the embedded image quality at the higher embedding rate compared to the other promising RDH schemes.
{"title":"Image Quality Enhancement with 2k-bit Correction in Pixel Repetition Embedding","authors":"Mohammad Ali Kawser, H. Nyeem","doi":"10.1109/ICTP48844.2019.9041698","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041698","url":null,"abstract":"While a higher embedding capacity of an RDH scheme is a timely need for the recent imaging-based applications, it proportionately degrades the visual quality of an embedded image. Existing RDH schemes have no separate consideration of improving the embedded image quality. This paper presents a new approach to improving the embedded image quality for a high capacity RDH scheme by utilizing a simple 2k -bit correction. A Pixel-Repetition (PR) is used to create an image block of 2 × 2 size for each of the original pixel (that we call a seed) of the image. Unlike the previous PR-based schemes, the embedding conditions are redefined to regenerate the seed pixel from the other 2 pixels of the block to embed additional k-bits in the seed pixel and apply the 2k -bit correction to ensure a better-embedded image quality. The preliminary results demonstrate that the proposed pixel correction significantly improves the embedded image quality at the higher embedding rate compared to the other promising RDH schemes.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121614141","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 : 2019-12-01DOI: 10.1109/ICTP48844.2019.9041733
Zayed Mohammad, Nayan Sarker, C. Das
This research work focuses on the design, analysis and simulation of a multiband Vivaldi antenna at unlicensed millimetre wave ISM band with resonance frequency-band of 55–66 GHz for high capacity 5G communication framework. The simulation of the proposed antenna is carried out using Rogers RT 5880 substrate. The modified noble design of the double-slotted Vivaldi antenna (DSVA) is proposed with few corrugations and grating elements in order to ameliorate the gain and directivity as well as −10 dB impedance bandwidth. The dimension of the proposed antenna is 70×40×1.07 mm3. This design is primarily focused in attaining a miniaturized antenna having good antenna characteristics with minimum weight and cost and simplicity of integration utilizing feed-networks. The proposed Vivaldi antenna provides excellent VSWR of less than 2 and the gain near about 13–15 dB of six obtained resonance frequencies in frequency-band 55–66 GHz which is very much suitable for high-speed 5G communication. The gain of this antenna is far better than some other recent conventional Vivaldi Antennas.
{"title":"Design and Analysis of a Double Slotted with Multiple Strips Vivaldi Antenna for High-Speed 5G Communications","authors":"Zayed Mohammad, Nayan Sarker, C. Das","doi":"10.1109/ICTP48844.2019.9041733","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041733","url":null,"abstract":"This research work focuses on the design, analysis and simulation of a multiband Vivaldi antenna at unlicensed millimetre wave ISM band with resonance frequency-band of 55–66 GHz for high capacity 5G communication framework. The simulation of the proposed antenna is carried out using Rogers RT 5880 substrate. The modified noble design of the double-slotted Vivaldi antenna (DSVA) is proposed with few corrugations and grating elements in order to ameliorate the gain and directivity as well as −10 dB impedance bandwidth. The dimension of the proposed antenna is 70×40×1.07 mm3. This design is primarily focused in attaining a miniaturized antenna having good antenna characteristics with minimum weight and cost and simplicity of integration utilizing feed-networks. The proposed Vivaldi antenna provides excellent VSWR of less than 2 and the gain near about 13–15 dB of six obtained resonance frequencies in frequency-band 55–66 GHz which is very much suitable for high-speed 5G communication. The gain of this antenna is far better than some other recent conventional Vivaldi Antennas.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126433233","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 : 2019-12-01DOI: 10.1109/ICTP48844.2019.9041823
Kazi Afsara Taher, Rafid Ur Rahman, Raina Iftekhar, Fardin Sabahat Khan, K. A. Taher
Optical dense wavelength division multiplexing (DWDM) system using erbium doped fiber amplifiers (EDFA) is getting popularity for communication networks due to its high information capacity, high channel count and low system costs. Nonlinear effects arise due to high transmitting power, which severely degrade the system performance EDFA. Cross phase modulation (XPM) is the most serious effect that affect the length of EDFA and due consideration should be given during design phase. The effect of XPM in an optical WDM system with EDFA is analysed and quantified in terms of realizable parameters. It is observed that in conventional DWDM system with standard operating parameters, the optimum length of the EDFA is 6 m.
{"title":"Effect of Cross Phase Modulation in Wavelength Division Multiplexing Optical System with EDFA","authors":"Kazi Afsara Taher, Rafid Ur Rahman, Raina Iftekhar, Fardin Sabahat Khan, K. A. Taher","doi":"10.1109/ICTP48844.2019.9041823","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041823","url":null,"abstract":"Optical dense wavelength division multiplexing (DWDM) system using erbium doped fiber amplifiers (EDFA) is getting popularity for communication networks due to its high information capacity, high channel count and low system costs. Nonlinear effects arise due to high transmitting power, which severely degrade the system performance EDFA. Cross phase modulation (XPM) is the most serious effect that affect the length of EDFA and due consideration should be given during design phase. The effect of XPM in an optical WDM system with EDFA is analysed and quantified in terms of realizable parameters. It is observed that in conventional DWDM system with standard operating parameters, the optimum length of the EDFA is 6 m.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133696399","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 : 2019-12-01DOI: 10.1109/ICTP48844.2019.9041775
C. M. A. Rahman, H. Nyeem
This paper reports an improved Active Contour Model (ACM) for image segmentation. Despite the significant development of the ACMs, their performances for the noisy and intensity-inhomogeneous images are still deficient. To tackle the intensity-inhomogeneity and noises in segmentation, new construction of local pre-fitting for evolving active contours is proposed. Two locally pre-fitted images are constructed from the local intensity estimation, and the relative entropy measures are used to define the local energy functional that provides statistical information of these images with the original image. Thereby, the desired contour evolution of the proposed model is expedited, and its noise-immunity is increased. The proposed model has demonstrated more initialization robustness, faster contour evolution and higher segmentation accuracy over the prominent ACMs for all the test images both with and without noise and intensity-inhomogeneity.
{"title":"Relative Entropy Pre-Fitting Model for Noisy and Intensity Inhomogeneous Image Segmentation","authors":"C. M. A. Rahman, H. Nyeem","doi":"10.1109/ICTP48844.2019.9041775","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041775","url":null,"abstract":"This paper reports an improved Active Contour Model (ACM) for image segmentation. Despite the significant development of the ACMs, their performances for the noisy and intensity-inhomogeneous images are still deficient. To tackle the intensity-inhomogeneity and noises in segmentation, new construction of local pre-fitting for evolving active contours is proposed. Two locally pre-fitted images are constructed from the local intensity estimation, and the relative entropy measures are used to define the local energy functional that provides statistical information of these images with the original image. Thereby, the desired contour evolution of the proposed model is expedited, and its noise-immunity is increased. The proposed model has demonstrated more initialization robustness, faster contour evolution and higher segmentation accuracy over the prominent ACMs for all the test images both with and without noise and intensity-inhomogeneity.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124875760","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 : 2019-12-01DOI: 10.1109/ICTP48844.2019.9041755
A. Galib, Nayan Sarker, M. Mondal
This paper presents the design of two multiband millimetre wave antennas for wireless communications. The design is performed using Computer Simulation Technology (CST) Microwave Studio tool. The performance of the antennas is evaluated in terms of gain, radiation efficiency and scattering parameter. The first one is a quad band antenna having a size of 5.2 mm by 5.5 mm and resonance frequencies at 35.68 GHz, 45.20 GHz, 55.42 GHz and 80.55 GHz. At the largest frequency of 80.55 GHz, the bandwidth, the gain and the directivity of this antenna are 3.5 GHz, 5.9662 dB and 6.353 dB, respectively. The second antenna is the array form of the first antenna. This penta band array antenna has resonance at 34.77 GHz, 47.23 GHz, 58.43 GHz, 69.63 GHz and 80.55 GHz. At the largest frequency of 80.55 GHz, the array antenna has a bandwidth, gain and directivity of 2.31 GHz, 13.792 dB and 15.14 dB, respectively. However, the array antenna has a larger size than the single antenna being 12.4 mm by 6.5 mm. Compared with the existing 80 GHz antennas, the proposed single and array antennas have compact size.
{"title":"Two Compact Multiband Millimetre Wave Antennas for Wireless Communication","authors":"A. Galib, Nayan Sarker, M. Mondal","doi":"10.1109/ICTP48844.2019.9041755","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041755","url":null,"abstract":"This paper presents the design of two multiband millimetre wave antennas for wireless communications. The design is performed using Computer Simulation Technology (CST) Microwave Studio tool. The performance of the antennas is evaluated in terms of gain, radiation efficiency and scattering parameter. The first one is a quad band antenna having a size of 5.2 mm by 5.5 mm and resonance frequencies at 35.68 GHz, 45.20 GHz, 55.42 GHz and 80.55 GHz. At the largest frequency of 80.55 GHz, the bandwidth, the gain and the directivity of this antenna are 3.5 GHz, 5.9662 dB and 6.353 dB, respectively. The second antenna is the array form of the first antenna. This penta band array antenna has resonance at 34.77 GHz, 47.23 GHz, 58.43 GHz, 69.63 GHz and 80.55 GHz. At the largest frequency of 80.55 GHz, the array antenna has a bandwidth, gain and directivity of 2.31 GHz, 13.792 dB and 15.14 dB, respectively. However, the array antenna has a larger size than the single antenna being 12.4 mm by 6.5 mm. Compared with the existing 80 GHz antennas, the proposed single and array antennas have compact size.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126470763","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 : 2019-12-01DOI: 10.1109/ICTP48844.2019.9041808
Tauhidul Haque, H. Rouf
A performance enhanced surface plasmon resonance (SPR) sensor has been designed with a molybdenum disulfide (MoSr2/graphene hybrid layer. Atomically thin transition metal dichalcogenide (TMDC) nanomaterials like Mos2 have exhibited better optical and electronic properties in the two-dimensional (2D) scale. The MoS2/graphene hybrid overlayer protects the metal layer of the SPR sensor from undesired oxidation and retains higher sensitivity. As they have large surface to volume ratio and adjustable biocompatibility, the sensor performance increases several times than only graphene based configuration. The proposed SPR sensor includes a titanium (Ti) layer which enhances the adherence level between silver and prism glass. Sensitivity factor (SF), sensor merit (SM), full-width at half-maximum (FWHM) and combined sensitivity factor (CSF) have been used to measure the performance of the proposed sensor. The proposed sensor has the SF of 71.260/RIU and CSF of 372.72 RIU−1, which are much higher than the existing sensor configuration without MoS2 overlayer.
{"title":"Sensitivity Enhanced Surface Plasmon Resonance (SPR) Sensors with MoS2/Graphene Hybrid Overlayer","authors":"Tauhidul Haque, H. Rouf","doi":"10.1109/ICTP48844.2019.9041808","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041808","url":null,"abstract":"A performance enhanced surface plasmon resonance (SPR) sensor has been designed with a molybdenum disulfide (MoSr2/graphene hybrid layer. Atomically thin transition metal dichalcogenide (TMDC) nanomaterials like Mos2 have exhibited better optical and electronic properties in the two-dimensional (2D) scale. The MoS2/graphene hybrid overlayer protects the metal layer of the SPR sensor from undesired oxidation and retains higher sensitivity. As they have large surface to volume ratio and adjustable biocompatibility, the sensor performance increases several times than only graphene based configuration. The proposed SPR sensor includes a titanium (Ti) layer which enhances the adherence level between silver and prism glass. Sensitivity factor (SF), sensor merit (SM), full-width at half-maximum (FWHM) and combined sensitivity factor (CSF) have been used to measure the performance of the proposed sensor. The proposed sensor has the SF of 71.260/RIU and CSF of 372.72 RIU−1, which are much higher than the existing sensor configuration without MoS2 overlayer.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115907032","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 : 2019-12-01DOI: 10.1109/ICTP48844.2019.9041711
Tahia Tasnim, Arpita Das, N. S. Pathan, Q. D. Hossain
To reduce the burden of the analysts for visual inspection of a big data size for sleep-scoring, an automatic sleep surveillance system is a prerequisite. Computer-aided sleep-scoring will also accelerate broad-ranging sleep study for the analysis of data. As most of the current sleep-staging projects are on the basis of multi-channel or several physiological signals which are not comfortable for the user, so automatic sleep-staging on one single channel system being trustworthy is still to be successful. For this work, a method based on single channel Electrooculogram (EOG) signal for computerized sleep scoring is proposed. In the suggested method, EOG signal epochs are decomposed into three modes using Variational Mode Decomposition (VMD) and multiple features like statistical measures, spectral entropy measures, RCMDE and Autoregressive modelling (AR) coefficients from different modes are extracted. Different classification models are examined for evaluating the results and Random-Forest-Classifier (RF) demonstrates most accurate result employing 10 fold cross-validtion. The efficacy of our system's algorithm against existing works in the literature shows that the suggested approach is similar to or show higher performance than previous existed methods. For the 6-states to 2-states sleep classification, the proposed algorithm provides 88.083%, 89.21 %, 90.57%, 93.05% and 96.537% overall accuracy respectively. In addition, the suggested algorithm for this work shows an accuracy of 65.092 % for the identification of sleep stage S1.
{"title":"Sleep States Classification Based on Single Channel Electrooculogram Signal Using Variational Mode Decomposition","authors":"Tahia Tasnim, Arpita Das, N. S. Pathan, Q. D. Hossain","doi":"10.1109/ICTP48844.2019.9041711","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041711","url":null,"abstract":"To reduce the burden of the analysts for visual inspection of a big data size for sleep-scoring, an automatic sleep surveillance system is a prerequisite. Computer-aided sleep-scoring will also accelerate broad-ranging sleep study for the analysis of data. As most of the current sleep-staging projects are on the basis of multi-channel or several physiological signals which are not comfortable for the user, so automatic sleep-staging on one single channel system being trustworthy is still to be successful. For this work, a method based on single channel Electrooculogram (EOG) signal for computerized sleep scoring is proposed. In the suggested method, EOG signal epochs are decomposed into three modes using Variational Mode Decomposition (VMD) and multiple features like statistical measures, spectral entropy measures, RCMDE and Autoregressive modelling (AR) coefficients from different modes are extracted. Different classification models are examined for evaluating the results and Random-Forest-Classifier (RF) demonstrates most accurate result employing 10 fold cross-validtion. The efficacy of our system's algorithm against existing works in the literature shows that the suggested approach is similar to or show higher performance than previous existed methods. For the 6-states to 2-states sleep classification, the proposed algorithm provides 88.083%, 89.21 %, 90.57%, 93.05% and 96.537% overall accuracy respectively. In addition, the suggested algorithm for this work shows an accuracy of 65.092 % for the identification of sleep stage S1.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127933980","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 : 2019-12-01DOI: 10.1109/ICTP48844.2019.9041747
Shahba Tasmiya Mouna, A. Habib, M. S. Alam
In this work, a single mode hybrid polymer photonic crystal fiber (PCF) having triangular lattice structure is proposed for possible supercontinuum generation. The hybrid polymer PCF is comprised of thin silica glass layers of few nanometres at the outer surface of the air holes. This air-silica-polymer combination makes the PCF highly nonlinear with extremely high nonlinear parameter and smaller modal effective area. Results show that the supercontinuum generation ranges from 500nm to more than 2166nm, which may be useful in the field of high performance optical coherence tomography (OCT) imaging systems, where a coherent and broadband light source with sufficient brightness and penetration depth is required. The effects of pulse power, pulse duration, length of PCF, etc., on supercontinuum spectra are also analysed and reported here.
{"title":"Design and Analysis of Supercontinuum Generating Hybrid Polymer Photonic Crystal Fiber for Medical Imaging","authors":"Shahba Tasmiya Mouna, A. Habib, M. S. Alam","doi":"10.1109/ICTP48844.2019.9041747","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041747","url":null,"abstract":"In this work, a single mode hybrid polymer photonic crystal fiber (PCF) having triangular lattice structure is proposed for possible supercontinuum generation. The hybrid polymer PCF is comprised of thin silica glass layers of few nanometres at the outer surface of the air holes. This air-silica-polymer combination makes the PCF highly nonlinear with extremely high nonlinear parameter and smaller modal effective area. Results show that the supercontinuum generation ranges from 500nm to more than 2166nm, which may be useful in the field of high performance optical coherence tomography (OCT) imaging systems, where a coherent and broadband light source with sufficient brightness and penetration depth is required. The effects of pulse power, pulse duration, length of PCF, etc., on supercontinuum spectra are also analysed and reported here.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132940114","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 : 2019-12-01DOI: 10.1109/ICTP48844.2019.9041777
M. Karim, B. Rahman
We numerically study the mid-infrared supercon-tinuum generation employing a 5-cm-long dispersion-engineered all chalcogenide step-index fiber made using As2 Se3 glass as a core and Ge11.5As24Se64.5 glass for its outer cladding. An ultrawideband supercontinuum spanning up to $14mu m$ could be generated employing a pump source having 170-fs pulses at $5.5mu m$ with a peak power of 10 kW.
{"title":"Mid-infrared wideband supercontinuum generation spanning up to 14 µm using dispersion-tailored all-chalcogenide step-index fiber","authors":"M. Karim, B. Rahman","doi":"10.1109/ICTP48844.2019.9041777","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041777","url":null,"abstract":"We numerically study the mid-infrared supercon-tinuum generation employing a 5-cm-long dispersion-engineered all chalcogenide step-index fiber made using As2 Se3 glass as a core and Ge<inf>11.5</inf>As<inf>24</inf>Se<inf>64.5</inf> glass for its outer cladding. An ultrawideband supercontinuum spanning up to <tex>$14mu m$</tex> could be generated employing a pump source having 170-fs pulses at <tex>$5.5mu m$</tex> with a peak power of 10 kW.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133225099","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 : 2019-01-16DOI: 10.1109/ICTP48844.2019.9041800
Md. Anwar Sadath, M. Faisal, Mohammad S. Islam
We proposed a novel Zeonex based ultra-high birefringent porous - core micro-structured fiber consisting of slotted cladding and hybrid core for THz wave guidance. FEM (Finite Element Method) is used with full-vector condition to investigate the wave guiding properties like birefringence, effective material loss, confinement loss, power fraction, dispersion, effective area and fiber nonlinearity having perfectly matched layer boundary. Addition of four circular holes (air) along with only three elliptical air holes in the core enhances the value of birefringence to 0.0818 with an effective material loss of only 0.0448 cm−1 and a confinement loss of 4×10−7 cm−1 at an operating frequency of 1 THz. Moreover, compact slotted geometry in the cladding imposes as high as 55.3% of total modal power to flow through the core air holes. Furthermore, a nearly flattened dispersion of 1.196±0.08 ps/THz/cm for a range of frequency (0.9-1.6THz) and fiber nonlinearity of 3.33×10−9 W−1 m−1 for an effective area of 1.32×105µm2 are obtained for x-polarized mode for the same operating frequency. This design can easily be fabricated exploiting the existing technology and would be suitable for polarization maintaining applications with a minimal absorption loss in the terahertz regime.
{"title":"Zeonex Based Polarization Maintaining Low Loss Porous Core Fiber for Terahertz Regime","authors":"Md. Anwar Sadath, M. Faisal, Mohammad S. Islam","doi":"10.1109/ICTP48844.2019.9041800","DOIUrl":"https://doi.org/10.1109/ICTP48844.2019.9041800","url":null,"abstract":"We proposed a novel Zeonex based ultra-high birefringent porous - core micro-structured fiber consisting of slotted cladding and hybrid core for THz wave guidance. FEM (Finite Element Method) is used with full-vector condition to investigate the wave guiding properties like birefringence, effective material loss, confinement loss, power fraction, dispersion, effective area and fiber nonlinearity having perfectly matched layer boundary. Addition of four circular holes (air) along with only three elliptical air holes in the core enhances the value of birefringence to 0.0818 with an effective material loss of only 0.0448 cm−1 and a confinement loss of 4×10−7 cm−1 at an operating frequency of 1 THz. Moreover, compact slotted geometry in the cladding imposes as high as 55.3% of total modal power to flow through the core air holes. Furthermore, a nearly flattened dispersion of 1.196±0.08 ps/THz/cm for a range of frequency (0.9-1.6THz) and fiber nonlinearity of 3.33×10−9 W−1 m−1 for an effective area of 1.32×105µm2 are obtained for x-polarized mode for the same operating frequency. This design can easily be fabricated exploiting the existing technology and would be suitable for polarization maintaining applications with a minimal absorption loss in the terahertz regime.","PeriodicalId":127575,"journal":{"name":"2019 IEEE International Conference on Telecommunications and Photonics (ICTP)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126624728","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：