Pub Date : 2013-12-19DOI: 10.1109/ICP.2013.6687055
R. Ramirez-Iniguez, F. Muhammad-Sukki, Siti Rawa Abu-Bakar, S. McMeekin, B. Stewart, N. Sarmah, T. Mallick, A. Munir, Siti Rajar Mohd Yasin, R. Abdul Rahim
Building Integrated Concentrated Photovoltaic (BICPV) systems are one of the options to reduce the dependency on fossil fuels and minimise energy consumption in buildings. These systems not only contribute to the generation of electricity, but also to the reduction of energy consumption by allowing the passage of ambient light and by making use of the cogenerated heat for indoor heating and/or cooling. This paper presents a novel optical concentrator called Rotationally Asymmetric Dielectric Totally Internally Reflecting Concentrator (RADTIRC) for use in BICPV systems. The RADTIRC-PV structure is capable of providing a maximum power concentration of 4.2x. Key benefits of this technology include: reduction of cost of BICPV systems, flexibility of design, and higher electrical power outputs.
{"title":"Rotationally asymmetric optical concentrators for solar PV and BIPV systems","authors":"R. Ramirez-Iniguez, F. Muhammad-Sukki, Siti Rawa Abu-Bakar, S. McMeekin, B. Stewart, N. Sarmah, T. Mallick, A. Munir, Siti Rajar Mohd Yasin, R. Abdul Rahim","doi":"10.1109/ICP.2013.6687055","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687055","url":null,"abstract":"Building Integrated Concentrated Photovoltaic (BICPV) systems are one of the options to reduce the dependency on fossil fuels and minimise energy consumption in buildings. These systems not only contribute to the generation of electricity, but also to the reduction of energy consumption by allowing the passage of ambient light and by making use of the cogenerated heat for indoor heating and/or cooling. This paper presents a novel optical concentrator called Rotationally Asymmetric Dielectric Totally Internally Reflecting Concentrator (RADTIRC) for use in BICPV systems. The RADTIRC-PV structure is capable of providing a maximum power concentration of 4.2x. Key benefits of this technology include: reduction of cost of BICPV systems, flexibility of design, and higher electrical power outputs.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"17 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":"116785504","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.2013.6687113
Aliaa Mamoun Kabbour, A. Amphawan, H. Fadhil, S. Aljunid
A six-channel 2.4GHz subcarrier multiplexing - optical code division multiple access (SCM-OCDMA) system in conjunction with the selective excitation of LP01 and LP02 modes is presented for a multimode fiber Local Area Network. Simulation results demonstrate that mode selectivity increases the bandwidth-distance product and improves the BER performance of the channel.
{"title":"Selective mode excitation in SCM-OCDMA","authors":"Aliaa Mamoun Kabbour, A. Amphawan, H. Fadhil, S. Aljunid","doi":"10.1109/ICP.2013.6687113","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687113","url":null,"abstract":"A six-channel 2.4GHz subcarrier multiplexing - optical code division multiple access (SCM-OCDMA) system in conjunction with the selective excitation of LP01 and LP02 modes is presented for a multimode fiber Local Area Network. Simulation results demonstrate that mode selectivity increases the bandwidth-distance product and improves the BER performance of the channel.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"7 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":"134559612","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.2013.6687126
P. Teh, S. Alam, Ho-Yin Chan, D. Shepherd, D. Richardson
We report the generation of short, transform-limited, ~18 ps optical pulses from an external fiber Bragg grating (FBG) stabilized semiconductor laser diode. Up to 7.2 pJ of pulse energy and a peak power of 400mW were achieved when operating at a repetition frequency of 832.6 MHz, a multiples of the cavity round trip frequency. A small detuning in the repetition frequency resulted in broader optical pulses. We have shown experimentally that an active mode-locking rather than gain switching mechanism is behind the generation of transform limited optical pulses at the optimum operating frequency.
{"title":"Generation of transfonn-limited picosecond pulses at 1.0 µm from a gain switched semiconductor laser diode","authors":"P. Teh, S. Alam, Ho-Yin Chan, D. Shepherd, D. Richardson","doi":"10.1109/ICP.2013.6687126","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687126","url":null,"abstract":"We report the generation of short, transform-limited, ~18 ps optical pulses from an external fiber Bragg grating (FBG) stabilized semiconductor laser diode. Up to 7.2 pJ of pulse energy and a peak power of 400mW were achieved when operating at a repetition frequency of 832.6 MHz, a multiples of the cavity round trip frequency. A small detuning in the repetition frequency resulted in broader optical pulses. We have shown experimentally that an active mode-locking rather than gain switching mechanism is behind the generation of transform limited optical pulses at the optimum operating frequency.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"380 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":"122855781","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.2013.6687098
M. Omar, H. Ley, J. Zainal, A. Ismail, R. K. Raja Ibrahim, S. Sakrani
Optical emission spectroscopy (OES) is applied to monitor the plasma behaviour during the deposition process of silicon carbide films in a very high frequency plasma enhanced chemical vapour deposition. The OES intensities for molecular radicals such as SiH*, CH* and atomic hydrogen lines were monitored throughout the process. By varying the discharge power, increasing power shows increasing OES intensities for aU species. The intensity ratio ISiH*/ICH* were found to have similar trend with crystalline volume fraction Xc of the films which suggest an influence of OES intensities with the output Xc of the films.
{"title":"Optical emission spectroscopy study on deposition process of silicon carbide thin films","authors":"M. Omar, H. Ley, J. Zainal, A. Ismail, R. K. Raja Ibrahim, S. Sakrani","doi":"10.1109/ICP.2013.6687098","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687098","url":null,"abstract":"Optical emission spectroscopy (OES) is applied to monitor the plasma behaviour during the deposition process of silicon carbide films in a very high frequency plasma enhanced chemical vapour deposition. The OES intensities for molecular radicals such as SiH*, CH* and atomic hydrogen lines were monitored throughout the process. By varying the discharge power, increasing power shows increasing OES intensities for aU species. The intensity ratio ISiH*/ICH* were found to have similar trend with crystalline volume fraction Xc of the films which suggest an influence of OES intensities with the output Xc of the films.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"13 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":"128759181","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.2013.6687124
A. Mansoor, Phua Yeong Nan, H. A. Abdul Rashid, Z. Yusoff, M. Othman
We have investigated the self-lasing effect of the linear multiwavelength Brillouin-Erbium fiber laser with different tunable bandpass filter's bandwidth. Two 3dB bandwidth of 1 nm and 3 nm filter were used in this study. The experimental results show that the width of the TBF bandwidth plays an important role in shaping the self-lasing effect. By using the tunable bandpass filter with a broader bandwidth, the self-lasing effect can be suppressed efficiently thus producing higher Brillouin Stokes lines. At 0 dBm Brillouin pump power, up to 11 stable output laser channels can be obtained with the utilization of the 3 nm TBF as compared to only 5 output channels with the utilization of 1 nm TBF.
{"title":"Effect of bandpass filter bandwidth on the performance of linear cavity multiwavelength BEFL","authors":"A. Mansoor, Phua Yeong Nan, H. A. Abdul Rashid, Z. Yusoff, M. Othman","doi":"10.1109/ICP.2013.6687124","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687124","url":null,"abstract":"We have investigated the self-lasing effect of the linear multiwavelength Brillouin-Erbium fiber laser with different tunable bandpass filter's bandwidth. Two 3dB bandwidth of 1 nm and 3 nm filter were used in this study. The experimental results show that the width of the TBF bandwidth plays an important role in shaping the self-lasing effect. By using the tunable bandpass filter with a broader bandwidth, the self-lasing effect can be suppressed efficiently thus producing higher Brillouin Stokes lines. At 0 dBm Brillouin pump power, up to 11 stable output laser channels can be obtained with the utilization of the 3 nm TBF as compared to only 5 output channels with the utilization of 1 nm TBF.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"104 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":"114186593","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.2013.6687141
K. P. W. Dissanayakel, S. D. Emami, H. A. Abdul-Rashidi, S. M. Aljamimi, Z. Yusoff, M. I. Zulkifli, S. Z. Muhamad-Yassin, K. A. Mat-Sharif, N. Tamchek
A new design of an S-band Thulium-doped modified Silica fiber co-doped with aluminum is presented. The design goal is high gain and low noise figure in the wavelength range of 1450 - 1520 nm. The optimization considers design parameters such as the cut-off wavelength, dopant concentration, waveguide structure, index profile and numerical aperture. These design parameters are optimized to achieve long fluorescence lifetime, high overlap factor and selected mode excitation. The amplifier performance is theoretically modelled and simulated considering the proposed design optimization. We show that the amplifier can achieve a gain of 16 dB and 3dB noise figure.
{"title":"Design and performance of an S-band Thulium doped modified silica fiber amplifier","authors":"K. P. W. Dissanayakel, S. D. Emami, H. A. Abdul-Rashidi, S. M. Aljamimi, Z. Yusoff, M. I. Zulkifli, S. Z. Muhamad-Yassin, K. A. Mat-Sharif, N. Tamchek","doi":"10.1109/ICP.2013.6687141","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687141","url":null,"abstract":"A new design of an S-band Thulium-doped modified Silica fiber co-doped with aluminum is presented. The design goal is high gain and low noise figure in the wavelength range of 1450 - 1520 nm. The optimization considers design parameters such as the cut-off wavelength, dopant concentration, waveguide structure, index profile and numerical aperture. These design parameters are optimized to achieve long fluorescence lifetime, high overlap factor and selected mode excitation. The amplifier performance is theoretically modelled and simulated considering the proposed design optimization. We show that the amplifier can achieve a gain of 16 dB and 3dB noise figure.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"19 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":"114671198","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.2013.6687135
S. M. Aljamimi, Z. Yusoff, H. Abdul-Rashid, M. S. Khairul Anuar, S. Z. Muhd-Yasin, M. I. Zulkifli, S. Hanif, N. Tamchek
This work is described for solution doping in Modified Chemical Vapor Deposition (MCVD) used for silica optical fiber fabrication. This paper will concentrate on aluminum solution doping and the effect of different solution concentrations. The effect of three different concentrations of aluminum (0.3M,0.7M and 1.2M) with the soot undergo heat treatment are studied while the other parameters of MCVD and solution doping are fixed such as deposition temperature, SiCl4 flow, and soaking time. The refractive index profile(RIP) of each doped preform is measured using preform analyzer to investigate aluminum distribution in the core region. Further investigation about Al distribution across the core sintered layer is also examined by EDX techniques.
{"title":"Aluminum doped silica preform fabrication using MCVD and solution doping technique: Effects of various aluminum solution concentrations","authors":"S. M. Aljamimi, Z. Yusoff, H. Abdul-Rashid, M. S. Khairul Anuar, S. Z. Muhd-Yasin, M. I. Zulkifli, S. Hanif, N. Tamchek","doi":"10.1109/ICP.2013.6687135","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687135","url":null,"abstract":"This work is described for solution doping in Modified Chemical Vapor Deposition (MCVD) used for silica optical fiber fabrication. This paper will concentrate on aluminum solution doping and the effect of different solution concentrations. The effect of three different concentrations of aluminum (0.3M,0.7M and 1.2M) with the soot undergo heat treatment are studied while the other parameters of MCVD and solution doping are fixed such as deposition temperature, SiCl4 flow, and soaking time. The refractive index profile(RIP) of each doped preform is measured using preform analyzer to investigate aluminum distribution in the core region. Further investigation about Al distribution across the core sintered layer is also examined by EDX techniques.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"11 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":"122152099","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.2013.6687080
S. Seyedzadeh, R. Sahbudin, A. Abas, S. Anas
Triple-play services including video, voice and data demand service differentiation to provide end-users quality-of-service (QoS) requirements. Optical Code Division Multiple Access (OCMDA) systems have emerged as suitable solution to provide such QoS differentiation by varying the code weight. In this paper, the effect of choosing different code weight sets on the system capacity of a Variable-Weight OCDMA (VW-OCDMA) system deploying different detection techniques is investigated. Mathematical analysis is used to drive the Bit-Error Rate (BER) of active users in the system.
{"title":"Weight optimization of Variable Weight OCDMA for triple-play services","authors":"S. Seyedzadeh, R. Sahbudin, A. Abas, S. Anas","doi":"10.1109/ICP.2013.6687080","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687080","url":null,"abstract":"Triple-play services including video, voice and data demand service differentiation to provide end-users quality-of-service (QoS) requirements. Optical Code Division Multiple Access (OCMDA) systems have emerged as suitable solution to provide such QoS differentiation by varying the code weight. In this paper, the effect of choosing different code weight sets on the system capacity of a Variable-Weight OCDMA (VW-OCDMA) system deploying different detection techniques is investigated. Mathematical analysis is used to drive the Bit-Error Rate (BER) of active users in the system.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"125 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":"131275623","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.2013.6687075
M. Khazaali
Three optical filter types namely Bessel, Gaussian and Rectangular has been used to evaluate the performance of 16 channels WDM system transmitting over FSO. The best fitting band pass filter however is found Bessel according to the results revealed for transmitting 2.S Gbps bit rate in 2km distance. Moreover, based on various turbulences the effects of atmospheric attenuation were examined using a Bessel optical filter. The highest tolerable transmission interval however found for high, moderate and low turbulence is 1.2, 1.7 and 2 km, respectively. In the last-mile link span the eye diagrams demonstrated no detection at the receiver part for high turbulence. There is adequate eye opening with the Q factor of 14.6689 and 7.2420 respectively, for low and moderate turbulence.
{"title":"Performance of a 162.5 Gbps WDM system transmitting over FSO medium","authors":"M. Khazaali","doi":"10.1109/ICP.2013.6687075","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687075","url":null,"abstract":"Three optical filter types namely Bessel, Gaussian and Rectangular has been used to evaluate the performance of 16 channels WDM system transmitting over FSO. The best fitting band pass filter however is found Bessel according to the results revealed for transmitting 2.S Gbps bit rate in 2km distance. Moreover, based on various turbulences the effects of atmospheric attenuation were examined using a Bessel optical filter. The highest tolerable transmission interval however found for high, moderate and low turbulence is 1.2, 1.7 and 2 km, respectively. In the last-mile link span the eye diagrams demonstrated no detection at the receiver part for high turbulence. There is adequate eye opening with the Q factor of 14.6689 and 7.2420 respectively, for low and moderate turbulence.","PeriodicalId":308672,"journal":{"name":"2013 IEEE 4th International Conference on Photonics (ICP)","volume":"36 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":"132858120","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.2013.6687072
W. Wong, S. Sandoghchi, F. Adikan
Since its first use in a real-time analysis of a biological system in 1990s, surface plasmon resonance (SPR) has become an important optical biosensing technology for its real-time, label-free, and noninvasive nature. In this paper we review electromagnetic theory of surface plasmons in dielectric-metal-dielectric planar waveguides and verify capabilities of an emerging computational package, COMSOL, that uses finite element methods (FEM) for analysis of plasmonic phenomena. Results of analytical and numerical methods are compared and accuracy of FEM solver is discussed.
{"title":"Surface plasmon in slab waveguide: A verification test-bed","authors":"W. Wong, S. Sandoghchi, F. Adikan","doi":"10.1109/ICP.2013.6687072","DOIUrl":"https://doi.org/10.1109/ICP.2013.6687072","url":null,"abstract":"Since its first use in a real-time analysis of a biological system in 1990s, surface plasmon resonance (SPR) has become an important optical biosensing technology for its real-time, label-free, and noninvasive nature. In this paper we review electromagnetic theory of surface plasmons in dielectric-metal-dielectric planar waveguides and verify capabilities of an emerging computational package, COMSOL, that uses finite element methods (FEM) for analysis of plasmonic phenomena. Results of analytical and numerical methods are compared and accuracy of FEM solver is discussed.","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":"122212509","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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