Pub Date : 2000-06-05DOI: 10.1109/ICTON.2000.874120
W. Bala
Epitaxial films of Zn1-xMgxSe have been grown with thicknesses up to 2 micrometers on GaAs [100] oriented substrates at different temperatures by MBE method. The growth of a range of epitaxial zinc sulphoselenide alloys and the growth of zinc selenide on [111] zinc telluride crystals are also reported and the significance of such films for applications in integrated optics is discussed. The refractive indices are determined experimentally by photoreflectance spectroscopy and prism-coupler method as a function of their composition. The refractive index of thin film zinc selenide alloys, determined from the measured effective indices of guided modes excited by a prism coupler, is shown to be reproducible and close to values measured for bulk material.
{"title":"Characterization of II-VI alloy semiconductor layers by photoreflectance spectroscopy and prism-coupler method","authors":"W. Bala","doi":"10.1109/ICTON.2000.874120","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874120","url":null,"abstract":"Epitaxial films of Zn1-xMgxSe have been grown with thicknesses up to 2 micrometers on GaAs [100] oriented substrates at different temperatures by MBE method. The growth of a range of epitaxial zinc sulphoselenide alloys and the growth of zinc selenide on [111] zinc telluride crystals are also reported and the significance of such films for applications in integrated optics is discussed. The refractive indices are determined experimentally by photoreflectance spectroscopy and prism-coupler method as a function of their composition. The refractive index of thin film zinc selenide alloys, determined from the measured effective indices of guided modes excited by a prism coupler, is shown to be reproducible and close to values measured for bulk material.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114198713","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874130
V. Katok, M. Kotenko, O. Ometsinska
We suggest ways of raising the effectiveness and of evaluating the exactitude of the method of stratification for the analysis of inhomogeneous dielectric waveguides. We will use the example of the symmetrical planar waveguide with dielectric boundaries. It is necessary to mention that the suggested method is valid both for the asymmetric planar optical waveguides, including those with reflecting metal boundaries, and for the optical fibers with diverse cross-sections.
{"title":"Ways of raising the effectiveness and evaluating the exactitude of the stratification method of analysis of inhomogeneous dielectric waveguides","authors":"V. Katok, M. Kotenko, O. Ometsinska","doi":"10.1109/ICTON.2000.874130","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874130","url":null,"abstract":"We suggest ways of raising the effectiveness and of evaluating the exactitude of the method of stratification for the analysis of inhomogeneous dielectric waveguides. We will use the example of the symmetrical planar waveguide with dielectric boundaries. It is necessary to mention that the suggested method is valid both for the asymmetric planar optical waveguides, including those with reflecting metal boundaries, and for the optical fibers with diverse cross-sections.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132619376","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874149
Yunfeng Shen, Chao Lu
The effect of homodyne crosstalk, including both coherent and incoherent crosstalk, introduced by optical add/drop multiplexers in wavelength division multiplexing ring/bus networks is studied. It is found that the effect of coherent crosstalk cumulates quickly as the number of nodes through which an optical signal passes increases, while the effect of incoherent crosstalk remains the same. Our results show that coherent crosstalk is the main source of signal degradation when the number of passed nodes is large.
{"title":"Effect of homodyne crosstalk in WDM ring/bus networks","authors":"Yunfeng Shen, Chao Lu","doi":"10.1109/ICTON.2000.874149","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874149","url":null,"abstract":"The effect of homodyne crosstalk, including both coherent and incoherent crosstalk, introduced by optical add/drop multiplexers in wavelength division multiplexing ring/bus networks is studied. It is found that the effect of coherent crosstalk cumulates quickly as the number of nodes through which an optical signal passes increases, while the effect of incoherent crosstalk remains the same. Our results show that coherent crosstalk is the main source of signal degradation when the number of passed nodes is large.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"211 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122605978","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874107
A. Nerukh, N. Sakhnenko, I.V. Schebatko
Green's function for the Maxwell's equations in a flat waveguide in which a homogeneous cold time-varying plasma is created at zero moment of time is derived. By virtue of the obtained Green's function the four-dimensional integral equation for an electromagnetic field is presented. This equation resolvent for the case of axial symmetric problems is obtained that allows to present the exact and explicit expressions for an axial symmetric distribution of an electromagnetic field.
{"title":"Axial symmetric electromagnetic pulse excitation in a flat waveguide with a time-varying plasma","authors":"A. Nerukh, N. Sakhnenko, I.V. Schebatko","doi":"10.1109/ICTON.2000.874107","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874107","url":null,"abstract":"Green's function for the Maxwell's equations in a flat waveguide in which a homogeneous cold time-varying plasma is created at zero moment of time is derived. By virtue of the obtained Green's function the four-dimensional integral equation for an electromagnetic field is presented. This equation resolvent for the case of axial symmetric problems is obtained that allows to present the exact and explicit expressions for an axial symmetric distribution of an electromagnetic field.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131670812","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874100
M. Wichers, W. Kaiser, W. Rosenkranz
We consider the efficiency of dispersion compensation to optical duobinary transmission. Considering dispersion compensation of one span we study the influence of transmitter configuration and optical input power to the dispersion tolerance.
{"title":"Improved dispersion tolerance of duobinary optical transmission considering the influence of duobinary filters and optical input power","authors":"M. Wichers, W. Kaiser, W. Rosenkranz","doi":"10.1109/ICTON.2000.874100","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874100","url":null,"abstract":"We consider the efficiency of dispersion compensation to optical duobinary transmission. Considering dispersion compensation of one span we study the influence of transmitter configuration and optical input power to the dispersion tolerance.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124675542","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874141
Z. Mahmood, S. Ullah, J. Rahman
Formation of smooth-vertical mirrors on GaAs by wet etching and reactive ion etching has been investigated for the fabrication of oxide-isolated stripe geometry lasers. The wet etching was carried out by the solution H/sub 2/SO/sub 4/-H/sub 2/O/sub 2/-H/sub 2/O at 2/spl deg/C for 10 and 20 minutes. The dry etching was performed using SiCl/sub 4/ gas in a single chamber reactive ion etcher (RIE). The optimum values obtained for the RIE system to achieve a smooth and vertical profile were 25 mTorr, 25 seem and 50 W respectively for pressure of the etch gas, mass flow rate of the etch gas and power of the machine. The etch profiles obtained for both wet and dry etching were inspected in the scanning electron microscope (SEM). The etch rate for wet chemical etching was found 0.01 /spl mu/m/minute while it was 0.45 /spl mu/m/minute for dry etching.
{"title":"Etching of n-type GaAs for fabrication of semiconductor laser","authors":"Z. Mahmood, S. Ullah, J. Rahman","doi":"10.1109/ICTON.2000.874141","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874141","url":null,"abstract":"Formation of smooth-vertical mirrors on GaAs by wet etching and reactive ion etching has been investigated for the fabrication of oxide-isolated stripe geometry lasers. The wet etching was carried out by the solution H/sub 2/SO/sub 4/-H/sub 2/O/sub 2/-H/sub 2/O at 2/spl deg/C for 10 and 20 minutes. The dry etching was performed using SiCl/sub 4/ gas in a single chamber reactive ion etcher (RIE). The optimum values obtained for the RIE system to achieve a smooth and vertical profile were 25 mTorr, 25 seem and 50 W respectively for pressure of the etch gas, mass flow rate of the etch gas and power of the machine. The etch profiles obtained for both wet and dry etching were inspected in the scanning electron microscope (SEM). The etch rate for wet chemical etching was found 0.01 /spl mu/m/minute while it was 0.45 /spl mu/m/minute for dry etching.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134402912","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874126
T. Gerasimchuk, V. Katok, A. Manko
The construction and results of accounts of the optical filter consisting of the ring resonator coupled with optical waveguides are submitted in this work. The characteristics of filters for different values of its parameters are represented. The expediency of application of filters in systems with WDM and DWDM is noted.
{"title":"Optical filters for systems with wavelength division-multiplexing","authors":"T. Gerasimchuk, V. Katok, A. Manko","doi":"10.1109/ICTON.2000.874126","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874126","url":null,"abstract":"The construction and results of accounts of the optical filter consisting of the ring resonator coupled with optical waveguides are submitted in this work. The characteristics of filters for different values of its parameters are represented. The expediency of application of filters in systems with WDM and DWDM is noted.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133695465","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874145
H. Baghdasaryan, D. Meghavoryan, N. Uzunoglu
In the presented paper frequency encoded Fiber-Optic Code Division Multiple Access (FO-CDMA) technique with broadband sources is investigated. The results of computer modeling of amplifying fiber Bragg gratings and the possibility of their implementation by using of consequent connected gratings as a coder in transmitter and correlator in receiver sides are shown. By applying of numerical models the performance analysis of frequency encoded FO-CDMA system is presented. Calculations are carried out for M-sequences and Walsh codes. It is shown that the choice of code sequence inside of the same family of codes, in the case of coded spectrum non uniformity, is an important factor for signal to noise ratio evaluation. The evaluation of the network operation distances under the fiber dispersion impact is also presented.
{"title":"Optical CDMA system based on amplifying fiber Bragg gratings chain","authors":"H. Baghdasaryan, D. Meghavoryan, N. Uzunoglu","doi":"10.1109/ICTON.2000.874145","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874145","url":null,"abstract":"In the presented paper frequency encoded Fiber-Optic Code Division Multiple Access (FO-CDMA) technique with broadband sources is investigated. The results of computer modeling of amplifying fiber Bragg gratings and the possibility of their implementation by using of consequent connected gratings as a coder in transmitter and correlator in receiver sides are shown. By applying of numerical models the performance analysis of frequency encoded FO-CDMA system is presented. Calculations are carried out for M-sequences and Walsh codes. It is shown that the choice of code sequence inside of the same family of codes, in the case of coded spectrum non uniformity, is an important factor for signal to noise ratio evaluation. The evaluation of the network operation distances under the fiber dispersion impact is also presented.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128580934","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874142
K. Poturaj, J. Wojcik, B. Janoszczyk, P. Mergo, M. Makara, W. Spytek, A. Kowalski, K. Abramski, E. Pawlik
Extension of quantity of transmission channels quantities in wave division multiplexing (WDM) is possible by wide spectral range of erbium doped fiber amplifier (EDFA) work. In this paper we present description of preparation and results of measurements of optical and spectral property of optical fiber from silica glass, which was doped with erbium in core (erbium doped fiber-EDF). This is optical fiber about absorption and issue curves shifted in direction of longer waves with comparison to standard EDF uses for construction of EDFA on band C. Thanks to this, what is supposed, this fiber will be useful to construction of EDFA on band L.
{"title":"Erbium doped fiber for L-band EDFA","authors":"K. Poturaj, J. Wojcik, B. Janoszczyk, P. Mergo, M. Makara, W. Spytek, A. Kowalski, K. Abramski, E. Pawlik","doi":"10.1109/ICTON.2000.874142","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874142","url":null,"abstract":"Extension of quantity of transmission channels quantities in wave division multiplexing (WDM) is possible by wide spectral range of erbium doped fiber amplifier (EDFA) work. In this paper we present description of preparation and results of measurements of optical and spectral property of optical fiber from silica glass, which was doped with erbium in core (erbium doped fiber-EDF). This is optical fiber about absorption and issue curves shifted in direction of longer waves with comparison to standard EDF uses for construction of EDFA on band C. Thanks to this, what is supposed, this fiber will be useful to construction of EDFA on band L.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117034544","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 : 2000-06-05DOI: 10.1109/ICTON.2000.874152
I. Nefedov, Y. Morozov, V. Gusyatnikov, A. Zheltikov
The change in the refractive index of GaAs due to the light-induced generation of nonequilibrium charge carriers is shown to substantially change the transmission of a one-dimensional GaAs/GaAlAs photonic band-gap structure, allowing low-threshold photonic-crystal optical logic gates to be created. Elementary logic operations of the Boolean algebra performed with nonlinear PBG structures, including the biconditional implication, module-two addition, Peirce's arrow, and disjunction, are demonstrated. We show how different logic operations can be performed with the same GaAs/GaAlAs PBG structure at different power densities of logic pulses.
{"title":"Optically controlling photonic band gap logic elements","authors":"I. Nefedov, Y. Morozov, V. Gusyatnikov, A. Zheltikov","doi":"10.1109/ICTON.2000.874152","DOIUrl":"https://doi.org/10.1109/ICTON.2000.874152","url":null,"abstract":"The change in the refractive index of GaAs due to the light-induced generation of nonequilibrium charge carriers is shown to substantially change the transmission of a one-dimensional GaAs/GaAlAs photonic band-gap structure, allowing low-threshold photonic-crystal optical logic gates to be created. Elementary logic operations of the Boolean algebra performed with nonlinear PBG structures, including the biconditional implication, module-two addition, Peirce's arrow, and disjunction, are demonstrated. We show how different logic operations can be performed with the same GaAs/GaAlAs PBG structure at different power densities of logic pulses.","PeriodicalId":314041,"journal":{"name":"2000 2nd International Conference on Transparent Optical Networks. Conference Proceedings (Cat. No.00EX408)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116791527","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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