Pub Date : 2013-12-19DOI: 10.1109/ICP.2013.6687097
A. Sulaiman, N. M. Yusoff, S. Hitam, A. Abas, M. Mahdi
We investigate a flat multiwavelength fiber laser (MWFL) with the extinction ratio (ER) is continuously adjustable at variation of either half wave plate (HWP) position or polarization maintaining fiber (PMF) length. The multiwavelength laser is generated from an intensity dependent transmission (IDT) effect which is induced from nonlinear polarization rotation (NPR), arising from a combination of a semiconductor optical amplifier (SOA), polarization controllers (PCs) and polarization beam splitter (PBS). The ER is continuously adjustable from 6 dB to 12 dB by rotating the HWP of a PC, as the same value of the minimum and the maximum ER can be obtained in every 45° of HWP position. The ER value is also adjustable at different length of PMF, as longer PMF is contributed to a flatter multiwavelength spectrum. The proposed MWFL design is simple, high number of lines, flat and able to adjust ER continuously.
{"title":"Investigation of continuously adjustable extinction ratio in a multiwavelength SOA fiber laser based on intensity dependent transmission effect","authors":"A. Sulaiman, N. M. Yusoff, S. Hitam, A. Abas, M. Mahdi","doi":"10.1109/ICP.2013.6687097","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687097","url":null,"abstract":"We investigate a flat multiwavelength fiber laser (MWFL) with the extinction ratio (ER) is continuously adjustable at variation of either half wave plate (HWP) position or polarization maintaining fiber (PMF) length. The multiwavelength laser is generated from an intensity dependent transmission (IDT) effect which is induced from nonlinear polarization rotation (NPR), arising from a combination of a semiconductor optical amplifier (SOA), polarization controllers (PCs) and polarization beam splitter (PBS). The ER is continuously adjustable from 6 dB to 12 dB by rotating the HWP of a PC, as the same value of the minimum and the maximum ER can be obtained in every 45° of HWP position. The ER value is also adjustable at different length of PMF, as longer PMF is contributed to a flatter multiwavelength spectrum. The proposed MWFL design is simple, high number of lines, flat and able to adjust ER continuously.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115182702","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 : 2013-12-19DOI: 10.1109/ICP.2013.6687104
Ngoc-Anh Tran, V. Mai, T. Thang, A. Pham
This paper analytically studies the performance of the most popular transport layer protocol, transmission control protocol (TCP), over VLC local networks employing automatic repeat-request/selective repeat (ARQ-SR) protocol in the link layer. We analytically derive the TCP throughput considering reflection, ISI and other VLC link conditions. We also confirm the improvement of TCP performance by selecting appropriate ARQ-SR parameters.
{"title":"Impact of reflections and ISI on the throughput of TCP over VLC networks with ARQ-SR protocol","authors":"Ngoc-Anh Tran, V. Mai, T. Thang, A. Pham","doi":"10.1109/ICP.2013.6687104","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687104","url":null,"abstract":"This paper analytically studies the performance of the most popular transport layer protocol, transmission control protocol (TCP), over VLC local networks employing automatic repeat-request/selective repeat (ARQ-SR) protocol in the link layer. We analytically derive the TCP throughput considering reflection, ISI and other VLC link conditions. We also confirm the improvement of TCP performance by selecting appropriate ARQ-SR parameters.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115016363","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 : 2013-12-19DOI: 10.1109/ICP.2013.6687103
A. Alhassan, N. Badruddin, N. Saad, S. Aljunid
This paper evaluates the performance of spatial multiplexing (SM) in beat noise mitigation in coherent spectral amplitude coding (SAC) OCDMA via the Optisystem software kit. We take into consideration two different laser source configurations; a centralized shared multi laser source and a precisely controlled multi laser source. For different performance merits, the results showed superiority of the SM SAC over the conventional SAC OCDMA. For example, an up to nine order of magnitude improvement in the bit error rate (BER) was reported for six users at 1.25 Gb/s.
{"title":"Beat noise mitigation through spatial multiplexing in spectral amplitude coding OCDMA networks","authors":"A. Alhassan, N. Badruddin, N. Saad, S. Aljunid","doi":"10.1109/ICP.2013.6687103","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687103","url":null,"abstract":"This paper evaluates the performance of spatial multiplexing (SM) in beat noise mitigation in coherent spectral amplitude coding (SAC) OCDMA via the Optisystem software kit. We take into consideration two different laser source configurations; a centralized shared multi laser source and a precisely controlled multi laser source. For different performance merits, the results showed superiority of the SM SAC over the conventional SAC OCDMA. For example, an up to nine order of magnitude improvement in the bit error rate (BER) was reported for six users at 1.25 Gb/s.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"90 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127421746","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 : 2013-12-19DOI: 10.1109/ICP.2013.6687066
S. Verma, S. Mukherjee
The Auger recombination is considered to be one of the reasons for the origin of efficiency droop in InGaN-based light-emitting diodes (LEDs). We discuss, through numerical simulation, the impact of Auger recombination on internal quantum efficiency (IQE), luminous power and electroluminescence intensity of hybrid green light-emitting diode. The simulation results indicate that large values of Auger recombination coefficient decreases IQE greatly. Also, electron leakage is found to be a contributing factor towards efficiency droop at high injection current.
{"title":"Impact of Auger recombination on hybrid green light-emitting diode","authors":"S. Verma, S. Mukherjee","doi":"10.1109/ICP.2013.6687066","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687066","url":null,"abstract":"The Auger recombination is considered to be one of the reasons for the origin of efficiency droop in InGaN-based light-emitting diodes (LEDs). We discuss, through numerical simulation, the impact of Auger recombination on internal quantum efficiency (IQE), luminous power and electroluminescence intensity of hybrid green light-emitting diode. The simulation results indicate that large values of Auger recombination coefficient decreases IQE greatly. Also, electron leakage is found to be a contributing factor towards efficiency droop at high injection current.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128623565","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 : 2013-12-19DOI: 10.1109/ICP.2013.6687120
N. Tamchek, S. Siti, Y. M. Amin, R. Nor, K. A. Mat-Sharif, H. Abdul-Rashid
Germanium doped silica optical preform fabricated using standard MCVD has been studied in terms of the effect of germanium-oxygen deficient defect using optical characterization techniques to investigate the effect of preform process temperature. The preforms are fabricated using standard MCVD process using SiCl4 and GeCl4 vapor precursor and their collapse temperature varies between 2100°C and 2200 °C. The absorption spectra of the preform at UV region is used to identify the Ge concentrations in the sample and the background loss. From the absorption result, two peaks can be observed at 5.1eV and 6.7eV. By using Raman and Photoluminescence spectroscopy, the effect of the temperature to the Ge concentration can also be quantify.
{"title":"Optical properties of GeO2-doped silica preform from absorption and vibrational spectroscopy","authors":"N. Tamchek, S. Siti, Y. M. Amin, R. Nor, K. A. Mat-Sharif, H. Abdul-Rashid","doi":"10.1109/ICP.2013.6687120","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687120","url":null,"abstract":"Germanium doped silica optical preform fabricated using standard MCVD has been studied in terms of the effect of germanium-oxygen deficient defect using optical characterization techniques to investigate the effect of preform process temperature. The preforms are fabricated using standard MCVD process using SiCl4 and GeCl4 vapor precursor and their collapse temperature varies between 2100°C and 2200 °C. The absorption spectra of the preform at UV region is used to identify the Ge concentrations in the sample and the background loss. From the absorption result, two peaks can be observed at 5.1eV and 6.7eV. By using Raman and Photoluminescence spectroscopy, the effect of the temperature to the Ge concentration can also be quantify.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131851611","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 : 2013-12-19DOI: 10.1109/ICP.2013.6687109
M. Ali, F. Abdullah, M. Z. Jamaludin, M. Al-Mansoori, T. F. Al-Mashhadani, A. Abass
The effect of the location of the Erbium-doped fiber (EDF) on the performance of the hybrid dispersion compensation of Raman/EDF amplifier is discussed in this study. Two different configuration set-ups were determined according to the position of the EDF amplifier. The setup in which EDF A is positioned before is denoted by type A, while type B denotes the setup in which EDFA is positioned after. In these two amplifier configurations, the Raman gain saturation due to the Stimulated Brillouin scattering (SBS) effect is included. Type B shows a better hybrid fiber amplifier (HF A) performance in terms of overall gain, noise figure (NF), and flatness gain profile. A small signal gain of 33 and 35 dB with a flat gain bandwidth of 40 nm is achieved for types A and B, respectively. In addition, type B exhibits a high peak gain of 23 dB, with gain variation of 3 dB along 70 nm bandwidth for large input signal compared with the 17 dB peak gain of type A with gain variation of 4.4 dB along the same bandwidth.
{"title":"Effect of EDF position on the performance of hybrid dispersion-compensating Raman/EDF amplifier","authors":"M. Ali, F. Abdullah, M. Z. Jamaludin, M. Al-Mansoori, T. F. Al-Mashhadani, A. Abass","doi":"10.1109/ICP.2013.6687109","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687109","url":null,"abstract":"The effect of the location of the Erbium-doped fiber (EDF) on the performance of the hybrid dispersion compensation of Raman/EDF amplifier is discussed in this study. Two different configuration set-ups were determined according to the position of the EDF amplifier. The setup in which EDF A is positioned before is denoted by type A, while type B denotes the setup in which EDFA is positioned after. In these two amplifier configurations, the Raman gain saturation due to the Stimulated Brillouin scattering (SBS) effect is included. Type B shows a better hybrid fiber amplifier (HF A) performance in terms of overall gain, noise figure (NF), and flatness gain profile. A small signal gain of 33 and 35 dB with a flat gain bandwidth of 40 nm is achieved for types A and B, respectively. In addition, type B exhibits a high peak gain of 23 dB, with gain variation of 3 dB along 70 nm bandwidth for large input signal compared with the 17 dB peak gain of type A with gain variation of 4.4 dB along the same bandwidth.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134183506","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 : 2013-12-19DOI: 10.1109/ICP.2013.6687086
H. J. Abd, N. M. Din, M. Al-Mansoori, Fairuz Abdullah, Hilal A. Fadhil
In long-haul transmission systems, optical transmission characteristics are degraded by four-wave mixing (FWM) generated in optical fibers. This paper presents a new approach to reduce the four wave mixing crosstalk based on polarization interleaving is presented. The FWM behavior and the performance of WDM systems were analyzed using the proposed technique. The simulation was performed using different power values with 100 GHz channel spacing, and at a data rate of 60Gbs. It was found that the FWM power was drastically reduced to -64 dBm when the polarization technique was used. In addition, the WDM system performance showed that at the sixth channel (192 THz), the suggested approach incurred a BER of 4.86×10-21, in comparison with the absence of the approach where the BER was 4.3×10-10 at the same received power. The results prove that the proposed system is superior in mitigating FWM crosstalk.
{"title":"Mitigation of FWM crosstalk in WDM system using polarization interleaving technique","authors":"H. J. Abd, N. M. Din, M. Al-Mansoori, Fairuz Abdullah, Hilal A. Fadhil","doi":"10.1109/ICP.2013.6687086","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687086","url":null,"abstract":"In long-haul transmission systems, optical transmission characteristics are degraded by four-wave mixing (FWM) generated in optical fibers. This paper presents a new approach to reduce the four wave mixing crosstalk based on polarization interleaving is presented. The FWM behavior and the performance of WDM systems were analyzed using the proposed technique. The simulation was performed using different power values with 100 GHz channel spacing, and at a data rate of 60Gbs. It was found that the FWM power was drastically reduced to -64 dBm when the polarization technique was used. In addition, the WDM system performance showed that at the sixth channel (192 THz), the suggested approach incurred a BER of 4.86×10-21, in comparison with the absence of the approach where the BER was 4.3×10-10 at the same received power. The results prove that the proposed system is superior in mitigating FWM crosstalk.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117028487","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 : 2013-12-19DOI: 10.1109/ICP.2013.6687094
J. Coronel, M. Varón, A. Rissons, S. Chaudron
This article presents the architecture for an optoelectronic oscillator using the properties of an injection locked VCSEL in order to improve the quality and frequency of the generated signals. The main advantage of this configuration is that the VCSEL is injection locked using another VCSEL. The use of this Injection-locked VCSEL-by-VCSEL source reduces the cost, complexity and power consumption of the system.
{"title":"Injection locked VCSEL based oscillator (ILVBO)","authors":"J. Coronel, M. Varón, A. Rissons, S. Chaudron","doi":"10.1109/ICP.2013.6687094","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687094","url":null,"abstract":"This article presents the architecture for an optoelectronic oscillator using the properties of an injection locked VCSEL in order to improve the quality and frequency of the generated signals. The main advantage of this configuration is that the VCSEL is injection locked using another VCSEL. The use of this Injection-locked VCSEL-by-VCSEL source reduces the cost, complexity and power consumption of the system.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114748558","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 : 2013-12-19DOI: 10.1109/ICP.2013.6687142
Mahfuza Begum, A. Rahman, H. Abdul-Rashid, W. S. wan Abdullah, N. Mohd Noor, M. I. Zulkifli, S. Z. Muhamad-Yasin, K. A. Mat-Sharif, N. Tamchek, S. N. Mat Nawi, N. Wahib, Y. M. Amin, D. Bradley
Thermoluminescence (TL) properties of five different core diameter of 6 mol% germanium (Ge) doped optical fibers have been investigated for the purpose of TL dosimetry. The optical fiber dosimeter TL properties is compared with commercially available TLD-100 chips (LiF:Mg,Ti). Samples were irradiated using Cobalt-60 standard radiation source ranging from 1Gy to 10 Gy. These fibers show good linear dose response up to 10 Gy. Highest core diameter of Ge doped optical fiber (core 100 μm) provides the best response among all fibers. We observe the larger core fiber show better response than smaller core fiber. The relative sensitivity of 100 μm core optical fiber is 0.26 ± 0.04 with respect to TLD-100 chip.
{"title":"Thermoluminescence response of Ge-doped optical fiber dosimeters with different core sizes","authors":"Mahfuza Begum, A. Rahman, H. Abdul-Rashid, W. S. wan Abdullah, N. Mohd Noor, M. I. Zulkifli, S. Z. Muhamad-Yasin, K. A. Mat-Sharif, N. Tamchek, S. N. Mat Nawi, N. Wahib, Y. M. Amin, D. Bradley","doi":"10.1109/ICP.2013.6687142","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687142","url":null,"abstract":"Thermoluminescence (TL) properties of five different core diameter of 6 mol% germanium (Ge) doped optical fibers have been investigated for the purpose of TL dosimetry. The optical fiber dosimeter TL properties is compared with commercially available TLD-100 chips (LiF:Mg,Ti). Samples were irradiated using Cobalt-60 standard radiation source ranging from 1Gy to 10 Gy. These fibers show good linear dose response up to 10 Gy. Highest core diameter of Ge doped optical fiber (core 100 μm) provides the best response among all fibers. We observe the larger core fiber show better response than smaller core fiber. The relative sensitivity of 100 μm core optical fiber is 0.26 ± 0.04 with respect to TLD-100 chip.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126365542","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 : 2013-12-19DOI: 10.1109/ICP.2013.6687111
S. Liaw, Pei-Shih Tsai, H. L. Minh, Zabih Ghassemlooy, Wen-Fang Wu
The paper presents a power-compensated, 3×3 reconfigurable, multiwavelength and bidirectional optical cross-connect (RMB-OXC) for all-optical communications networks. RMB-OXC characteristics and its performance are experimentally verified in a bidirectional 8-channel × 10 Gb/s capacity system. We have observed only ~0.5 dB power penalty in the bidirectional transmission in comparison to the unidirectional transmission. The proposed RMB-OXC can be utilised in many applications in high-speed wavelength division multiplexed (WDM) networks.
{"title":"BER evaluation/or 3×3 reconfigurable multiwavelength bidirectional optical cross-connect","authors":"S. Liaw, Pei-Shih Tsai, H. L. Minh, Zabih Ghassemlooy, Wen-Fang Wu","doi":"10.1109/ICP.2013.6687111","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687111","url":null,"abstract":"The paper presents a power-compensated, 3×3 reconfigurable, multiwavelength and bidirectional optical cross-connect (RMB-OXC) for all-optical communications networks. RMB-OXC characteristics and its performance are experimentally verified in a bidirectional 8-channel × 10 Gb/s capacity system. We have observed only ~0.5 dB power penalty in the bidirectional transmission in comparison to the unidirectional transmission. The proposed RMB-OXC can be utilised in many applications in high-speed wavelength division multiplexed (WDM) networks.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127065617","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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