Pub Date : 2000-05-23DOI: 10.1109/LFNM.2000.854038
I. V. Gerasimchuk, A. Kovalev
In one of our recent papers (see Radiotekhnika, vol. 110, p. 134, 1999) we described the propagation of the optical flux in the system of two coupled parallel plane waveguides in a nonlinear optical medium. We obtained the value of the light beam interaction in the optical waveguides and the set of the discrete nonlinear equations supposing that waveguides and environment differ in the linear refractive indexes. We demonstrated the possibility of the localization of the nonlinear light flux only on one waveguide. We took into account only the nonlinear Kerr terms inside the waveguides. We used the restriction of a linear optical medium between the waveguides. The equation which describes the slow varying of the envelope of the complex field is directed perpendicularly to the planes of the parallel waveguides.
在我们最近的一篇论文中(见Radiotekhnika, vol. 110, p. 134, 1999)，我们描述了在非线性光学介质中两个耦合平行平面波导系统中光通量的传播。在光波导与环境线性折射率不同的情况下，得到了光束在光波导中的相互作用值和离散非线性方程组。我们证明了非线性光通量仅在一个波导上定位的可能性。我们只考虑了波导内部的非线性克尔项。我们利用了波导之间线性光介质的限制。描述复场包络缓慢变化的方程垂直于平行波导的平面。
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Pub Date : 2000-05-23DOI: 10.1109/LFNM.2000.854029
V. M. Babich, Y. Machekhin
We summarise some preliminary research and considerations on design of semiconductor frequency stabilized lasers for application in the coherent fiber optic communications as a reference laser. Semiconductor lasers applied to fiber optic communications have to meet several specific requirements such as narrow line width of the radiation, broad frequency range of the continuous tuning without mode hopping, capability to be stabilized upon natural references in a wide wavelength range up to 15 nm. The natural references can be found in the absorption bands of the different gases and vapors covering a wide spectral range around 1.5 /spl mu/m.
{"title":"Frequency stabilized lasers for coherent optical communications","authors":"V. M. Babich, Y. Machekhin","doi":"10.1109/LFNM.2000.854029","DOIUrl":"https://doi.org/10.1109/LFNM.2000.854029","url":null,"abstract":"We summarise some preliminary research and considerations on design of semiconductor frequency stabilized lasers for application in the coherent fiber optic communications as a reference laser. Semiconductor lasers applied to fiber optic communications have to meet several specific requirements such as narrow line width of the radiation, broad frequency range of the continuous tuning without mode hopping, capability to be stabilized upon natural references in a wide wavelength range up to 15 nm. The natural references can be found in the absorption bands of the different gases and vapors covering a wide spectral range around 1.5 /spl mu/m.","PeriodicalId":265943,"journal":{"name":"Proceedings of LFNM'2000. 2nd International Workshop on Laser and Fiber-Optical Networks Modeling (Cat. No.00EX419)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122408350","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 : 2000-05-23DOI: 10.1109/LFNM.2000.854049
S. Nikolaev, V. Pozhar
The possible using of the coaxial cell for solid-state lasers and dye laser fabrication were previously investigated. The emission characteristics of such lasers were studied in detail by previous authors. The formation and evolution regularities of the directional diagram conditioned by the pumping mode of the coaxial cell were particularly investigated. It is found that the cavity of the dye laser with the internally excited coaxial cell (DLIECC) becomes similar to an unsteady one and therefore the directional diagram of its radiation is very narrow. In comparison with the dye lasers with external excitation of the cell (DLEEC) the radiation spatial brightness of the DLIECC is increased by more than 20 times.
{"title":"Spectral characteristics of dye laser with coaxial cell pumped on inside","authors":"S. Nikolaev, V. Pozhar","doi":"10.1109/LFNM.2000.854049","DOIUrl":"https://doi.org/10.1109/LFNM.2000.854049","url":null,"abstract":"The possible using of the coaxial cell for solid-state lasers and dye laser fabrication were previously investigated. The emission characteristics of such lasers were studied in detail by previous authors. The formation and evolution regularities of the directional diagram conditioned by the pumping mode of the coaxial cell were particularly investigated. It is found that the cavity of the dye laser with the internally excited coaxial cell (DLIECC) becomes similar to an unsteady one and therefore the directional diagram of its radiation is very narrow. In comparison with the dye lasers with external excitation of the cell (DLEEC) the radiation spatial brightness of the DLIECC is increased by more than 20 times.","PeriodicalId":265943,"journal":{"name":"Proceedings of LFNM'2000. 2nd International Workshop on Laser and Fiber-Optical Networks Modeling (Cat. No.00EX419)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123215423","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 : 2000-05-23DOI: 10.1109/LFNM.2000.854045
A. Filipenko
High quality fiber optic connectors are a crucial part of any fiber optic system. Back reflection or return loss in fiber connectors is the amount of the light reflected back towards the source relative to the forward signal. The primary cause of the back reflection is a discontinuity in the refraction index of the fiber (Fresnel reflections). Changing the connector end face by polishing can control this effect. The grain of the end face of the physical contact connectors after polishing should not exceed 0.035mkm. We check this by using a microinterferometer in which the fringes and researched surface are observed simultaneously.
{"title":"Fiber connector end face analysis by interference method","authors":"A. Filipenko","doi":"10.1109/LFNM.2000.854045","DOIUrl":"https://doi.org/10.1109/LFNM.2000.854045","url":null,"abstract":"High quality fiber optic connectors are a crucial part of any fiber optic system. Back reflection or return loss in fiber connectors is the amount of the light reflected back towards the source relative to the forward signal. The primary cause of the back reflection is a discontinuity in the refraction index of the fiber (Fresnel reflections). Changing the connector end face by polishing can control this effect. The grain of the end face of the physical contact connectors after polishing should not exceed 0.035mkm. We check this by using a microinterferometer in which the fringes and researched surface are observed simultaneously.","PeriodicalId":265943,"journal":{"name":"Proceedings of LFNM'2000. 2nd International Workshop on Laser and Fiber-Optical Networks Modeling (Cat. No.00EX419)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131443093","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 : 2000-05-23DOI: 10.1109/LFNM.2000.854052
K.I. Muntean
The cardinal problem of modern precision interferometry is the increase in systematic errors of high stability laser wavelength measurement. The typical equipment for laser wavelength comparison includes two stabilized lasers whose wavelengths are compared, the telescoping Fabry-Perot interferometer, two local oscillators, servosystems and the beat frequency meter.
{"title":"Laser wavelength comparison optimization problem","authors":"K.I. Muntean","doi":"10.1109/LFNM.2000.854052","DOIUrl":"https://doi.org/10.1109/LFNM.2000.854052","url":null,"abstract":"The cardinal problem of modern precision interferometry is the increase in systematic errors of high stability laser wavelength measurement. The typical equipment for laser wavelength comparison includes two stabilized lasers whose wavelengths are compared, the telescoping Fabry-Perot interferometer, two local oscillators, servosystems and the beat frequency meter.","PeriodicalId":265943,"journal":{"name":"Proceedings of LFNM'2000. 2nd International Workshop on Laser and Fiber-Optical Networks Modeling (Cat. No.00EX419)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121391239","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 : 2000-05-23DOI: 10.1109/LFNM.2000.854051
K. Muntean, V. Svich
The laser source of radiation is precision interferometric equipment for high-resolution comparison of laser wavelengths. The phase shift of the electromagnetic wave in the resonant cavity of an interferometer is the basic source of the dominant systematic error of this comparison. Thus precision determination of the phase shift error is a necessary condition for using the modern method of the definition of the unit of the length.
{"title":"Influence of mode-mismatching on total phase shift of wave in cavity","authors":"K. Muntean, V. Svich","doi":"10.1109/LFNM.2000.854051","DOIUrl":"https://doi.org/10.1109/LFNM.2000.854051","url":null,"abstract":"The laser source of radiation is precision interferometric equipment for high-resolution comparison of laser wavelengths. The phase shift of the electromagnetic wave in the resonant cavity of an interferometer is the basic source of the dominant systematic error of this comparison. Thus precision determination of the phase shift error is a necessary condition for using the modern method of the definition of the unit of the length.","PeriodicalId":265943,"journal":{"name":"Proceedings of LFNM'2000. 2nd International Workshop on Laser and Fiber-Optical Networks Modeling (Cat. No.00EX419)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129466883","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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