Pub Date : 2000-09-10DOI: 10.1109/CLEOE.2000.910210
T. Symul, K. Bencheikh, D. Eger, M. Oron, J. Levenson
Summary form only given. We propose and demonstrate a travelling-wave nonlinear device for optical signal processing. It is based on the sequential use of a nonlinear phase shift (Kerr-like effect) and a phase sensitive parametric amplification (PSA). Even though it is under first step investigations, this arrangement has already featured interesting optical proprieties, among which: (1) amplification of a weak modulation encoded on a strong optical signal, better than the usual gain of the bare PSA. (2) Sign inversion of the weak modulation with absolute gain greater than unity. (3) Complete suppression of classical noise. For these demonstrations, the processed signal is generated by a pulsed frequency doubled Nd:YLF laser.
{"title":"Combined optical nonlinearities for travelling-wave signal processing","authors":"T. Symul, K. Bencheikh, D. Eger, M. Oron, J. Levenson","doi":"10.1109/CLEOE.2000.910210","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910210","url":null,"abstract":"Summary form only given. We propose and demonstrate a travelling-wave nonlinear device for optical signal processing. It is based on the sequential use of a nonlinear phase shift (Kerr-like effect) and a phase sensitive parametric amplification (PSA). Even though it is under first step investigations, this arrangement has already featured interesting optical proprieties, among which: (1) amplification of a weak modulation encoded on a strong optical signal, better than the usual gain of the bare PSA. (2) Sign inversion of the weak modulation with absolute gain greater than unity. (3) Complete suppression of classical noise. For these demonstrations, the processed signal is generated by a pulsed frequency doubled Nd:YLF laser.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"39 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120896442","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909989
P. Glas, D. Fischer, M. Leitner, T. Sandrock, M. Wrage, T. Pertsch, A. P. Napartovich, N. N. Elkin, A. G. Sukharev, V. N. Troshchieva, D. V. Vysotsky
Summary form only. The development of high power diode-pumped fiber lasers for cw or pulsed applications requires a good transfer of pump-to-fiber laser radiation, a high slope efficiency and management of thermal problems. For high power solitary femtosecond fiber lasers the chirp parameter should be small combined with a proper value of the group velocity dispersion. To have decided to use a multitude of doped monomode fibers (61) confined within a common pump core of large diameter (multicore fiber). We show that using a multimode interference device (MMI) being made up of a step index multimode fiber coupled to the multicore fiber the uncorrelated emission may be influenced via field reconstruction.
{"title":"Improvement of the emission characteristics of a multicore fiber laser using self reproduction in a multimode interference device (MMI)","authors":"P. Glas, D. Fischer, M. Leitner, T. Sandrock, M. Wrage, T. Pertsch, A. P. Napartovich, N. N. Elkin, A. G. Sukharev, V. N. Troshchieva, D. V. Vysotsky","doi":"10.1109/CLEOE.2000.909989","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909989","url":null,"abstract":"Summary form only. The development of high power diode-pumped fiber lasers for cw or pulsed applications requires a good transfer of pump-to-fiber laser radiation, a high slope efficiency and management of thermal problems. For high power solitary femtosecond fiber lasers the chirp parameter should be small combined with a proper value of the group velocity dispersion. To have decided to use a multitude of doped monomode fibers (61) confined within a common pump core of large diameter (multicore fiber). We show that using a multimode interference device (MMI) being made up of a step index multimode fiber coupled to the multicore fiber the uncorrelated emission may be influenced via field reconstruction.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121218345","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909669
M. Leitner, P. Glas, M. Wrage, T. Sandrock, H. Legall, A. Heuer, G. Apostolopoulos, J. Herfort, L. Daweritz
Summary form only given. In recent years the development of semiconductor devices like SESAMs has led to a substantial progress in the generation of ultrashort pulses in solid-state lasers. The use of semiconductor materials makes it possible to combine strong nonlinear properties with short recombination times. In this work we describe a novel mode locking device based on low-temperature-grown GaAs (LT-GaAs) combined with a double-clad silica fiber laser being doped with Nd/sub 2/O/sub 3/ (1300 ppm) emitting at 1.06 /spl mu/m. The mode locking mechanism is based on the intensity dependent defocusing in the LT-GaAs.
{"title":"Mode locked Nd:glass fiber laser using intensity dependent defocusing by low-temperature-grown GaAs","authors":"M. Leitner, P. Glas, M. Wrage, T. Sandrock, H. Legall, A. Heuer, G. Apostolopoulos, J. Herfort, L. Daweritz","doi":"10.1109/CLEOE.2000.909669","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909669","url":null,"abstract":"Summary form only given. In recent years the development of semiconductor devices like SESAMs has led to a substantial progress in the generation of ultrashort pulses in solid-state lasers. The use of semiconductor materials makes it possible to combine strong nonlinear properties with short recombination times. In this work we describe a novel mode locking device based on low-temperature-grown GaAs (LT-GaAs) combined with a double-clad silica fiber laser being doped with Nd/sub 2/O/sub 3/ (1300 ppm) emitting at 1.06 /spl mu/m. The mode locking mechanism is based on the intensity dependent defocusing in the LT-GaAs.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121380930","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.910049
A. Zakery, A. Rode, B. Luther-Davies
Summary form only given. Chalcogenide glasses are low phonon energy materials and hence are transparent from the visible up to the infrared. These glasses are susceptible to electromagnetic radiation and show a wide variety of photoinduced effects as a result of illumination. These photoinduced effects can be used to fabricate diffractive as well as waveguide structures in these glasses. Up to now thermally evaporated and sputtered films have been mainly used for fabrication of these structures in chalcogenide glasses. We deposited up to 5 pm thick As/sub 2/S/sub 3/-glass films using high-repetition-rate laser ablation with the second harmonic of a Nd:YAG laser. The possibility of producing films by the laser ablation facilitates fabrication of devices with low scattering centres. Until now very little work has been done to fabricate structures in the pulsed laser deposited films and these works have been limited to films of Ga-La-S glasses. As a result of illumination photodarkening has been observed in the laser-deposited As/sub 2/S/sub 3/ films for the first time.
{"title":"Analysis of photodarkening kinetics in the pulsed laser deposited As/sub 2/S/sub 3/ films","authors":"A. Zakery, A. Rode, B. Luther-Davies","doi":"10.1109/CLEOE.2000.910049","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910049","url":null,"abstract":"Summary form only given. Chalcogenide glasses are low phonon energy materials and hence are transparent from the visible up to the infrared. These glasses are susceptible to electromagnetic radiation and show a wide variety of photoinduced effects as a result of illumination. These photoinduced effects can be used to fabricate diffractive as well as waveguide structures in these glasses. Up to now thermally evaporated and sputtered films have been mainly used for fabrication of these structures in chalcogenide glasses. We deposited up to 5 pm thick As/sub 2/S/sub 3/-glass films using high-repetition-rate laser ablation with the second harmonic of a Nd:YAG laser. The possibility of producing films by the laser ablation facilitates fabrication of devices with low scattering centres. Until now very little work has been done to fabricate structures in the pulsed laser deposited films and these works have been limited to films of Ga-La-S glasses. As a result of illumination photodarkening has been observed in the laser-deposited As/sub 2/S/sub 3/ films for the first time.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121406584","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909875
S. Falter, K. Du, P. Loosen, R. Poprawe, O. Baldus, R. Waser
Summary form only given. The concept of two laser sources has been developed whose pulse generation signals and light paths are synchronized. This can be realized with an accuracy in the nanosecond range, so the two temporally shifted pulses act onto the material with a separation significantly shorter than the thermal dissipation time of several microseconds, hence appearing to the target as one pulse but keeping the original pulse energies of the two given pulses. The acoustooptically Q-switched lasers consist of a double folded linear cavity, and are pumped from one side by a fiber-coupled diode laser module producing 20 W. The fundamental radiation is frequency doubled and tripled by two LBO crystals.
{"title":"UV beam sources for double pulse generation","authors":"S. Falter, K. Du, P. Loosen, R. Poprawe, O. Baldus, R. Waser","doi":"10.1109/CLEOE.2000.909875","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909875","url":null,"abstract":"Summary form only given. The concept of two laser sources has been developed whose pulse generation signals and light paths are synchronized. This can be realized with an accuracy in the nanosecond range, so the two temporally shifted pulses act onto the material with a separation significantly shorter than the thermal dissipation time of several microseconds, hence appearing to the target as one pulse but keeping the original pulse energies of the two given pulses. The acoustooptically Q-switched lasers consist of a double folded linear cavity, and are pumped from one side by a fiber-coupled diode laser module producing 20 W. The fundamental radiation is frequency doubled and tripled by two LBO crystals.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121483915","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.910403
G. Huber, V. Peters, K. Petermann
Summary form only given. The sesquioxide of yttrium is subject of interest to the fields of laser physics and spectroscopy since the early sixties. It exhibits a thermal conductivity that is higher than that of the well established laser host material Y/sub 3/Al/sub 5/O/sub 12/ (YAG). Similarly high thermal conductivities can also be found in the isostructural scandia (Sc/sub 2/O/sub 3/) and lutetia (Lu/sub 2/O/sub 3/). The thermal conductivities range between 12.5 W/mK in lutetia and 16.5 W/mK in scandia, measured at 50 C. Undoped YAG shows a thermal conductivity of 11 W/mK measured under the same conditions. This property makes the sesquioxides promising host materials for rare-earth based laser systems, especially for high power applications.
{"title":"New solid-state lasers based on rare-earth doped sesquioxide crystals","authors":"G. Huber, V. Peters, K. Petermann","doi":"10.1109/CLEOE.2000.910403","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910403","url":null,"abstract":"Summary form only given. The sesquioxide of yttrium is subject of interest to the fields of laser physics and spectroscopy since the early sixties. It exhibits a thermal conductivity that is higher than that of the well established laser host material Y/sub 3/Al/sub 5/O/sub 12/ (YAG). Similarly high thermal conductivities can also be found in the isostructural scandia (Sc/sub 2/O/sub 3/) and lutetia (Lu/sub 2/O/sub 3/). The thermal conductivities range between 12.5 W/mK in lutetia and 16.5 W/mK in scandia, measured at 50 C. Undoped YAG shows a thermal conductivity of 11 W/mK measured under the same conditions. This property makes the sesquioxides promising host materials for rare-earth based laser systems, especially for high power applications.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124073555","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909987
A. Grudinin, J. Nilsson, P. Turner
Summary form only. We discuss recent developments in high power fibre lasers and amplifiers. Particular attention is paid to pump launching schemes and methods to minimise nonlinear distortion in fibre amplifiers.
{"title":"New generation of cladding pumped fibre lasers and amplifiers","authors":"A. Grudinin, J. Nilsson, P. Turner","doi":"10.1109/CLEOE.2000.909987","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909987","url":null,"abstract":"Summary form only. We discuss recent developments in high power fibre lasers and amplifiers. Particular attention is paid to pump launching schemes and methods to minimise nonlinear distortion in fibre amplifiers.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124084313","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909743
J. Knight, T. Birks, P. Russell
The enhanced optical response of two-dimensionally microstructured silica has enabled the development of a range of new optical waveguides-photonic crystal fibres. We describe some of the waveguiding characteristics and applications of these structures.
{"title":"Properties and applications of photonic crystal fibres","authors":"J. Knight, T. Birks, P. Russell","doi":"10.1109/CLEOE.2000.909743","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909743","url":null,"abstract":"The enhanced optical response of two-dimensionally microstructured silica has enabled the development of a range of new optical waveguides-photonic crystal fibres. We describe some of the waveguiding characteristics and applications of these structures.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124119695","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909782
R. Zaibel, Y. Glick, G. Bar-Tal, M. Winik, S. Tsadka
Summary form only given. Cross-wind speed was measured, using a one-station scheme, over a flat sandy beach strip, parallel to the Mediterranean seashore. A diffusive white target distanced 1.5 km away was illuminated with a 5 mJ, Q-switched Nd:YAG laser beam with a rep-rate of 500 Hz. The laser spot on the target had a diameter of about 50 cm. The reflected beam was imaged, near the laser, onto a linear array detector of 50/spl times/250 /spl mu/m element size by a f-1000 mm D=91 mm, Cassegrain lens.
{"title":"Remote cross-wind measurement using atmospheric turbulence","authors":"R. Zaibel, Y. Glick, G. Bar-Tal, M. Winik, S. Tsadka","doi":"10.1109/CLEOE.2000.909782","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909782","url":null,"abstract":"Summary form only given. Cross-wind speed was measured, using a one-station scheme, over a flat sandy beach strip, parallel to the Mediterranean seashore. A diffusive white target distanced 1.5 km away was illuminated with a 5 mJ, Q-switched Nd:YAG laser beam with a rep-rate of 500 Hz. The laser spot on the target had a diameter of about 50 cm. The reflected beam was imaged, near the laser, onto a linear array detector of 50/spl times/250 /spl mu/m element size by a f-1000 mm D=91 mm, Cassegrain lens.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124170595","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 : 2000-09-10DOI: 10.1109/CLEOE.2000.909773
C. Knoell, M. Goelles, Z. Bakonyi, G. Onishchoukov, F. Lederer
Summary form only given. Saturable absorbers (SA) are extensively used for passive mode locking in ultrashort pulse lasers. Their particular features can be likewise exploited for increasing the transmission capacity in long haul fiber networks where gain is provided by semiconductor optical amplifiers (SOA). An integrated single chip SOA-SA module (SOASA) is particularly useful and can be manufactured by ion-implantation through one facet of a bulk laser diode chip with antireflection coatings on both sides. In order to maximize the transmission capacity an analytical model is required that describes the SOASA single pulse response as a function of relevant system and signal parameters. To achieve this goal we used the model established previously. This SOASA module was likewise used in our experiments. The crucial system parameters of the model are recovery time, saturation energy, small signal gain and Henry factor of both the SOA and the SA section. Based on the analytical response function expressions for temporal walk off, energy gain and spectral shift can be obtained.
{"title":"Features of a semiconductor optical amplifier/saturable absorber module in signal transmission lines","authors":"C. Knoell, M. Goelles, Z. Bakonyi, G. Onishchoukov, F. Lederer","doi":"10.1109/CLEOE.2000.909773","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909773","url":null,"abstract":"Summary form only given. Saturable absorbers (SA) are extensively used for passive mode locking in ultrashort pulse lasers. Their particular features can be likewise exploited for increasing the transmission capacity in long haul fiber networks where gain is provided by semiconductor optical amplifiers (SOA). An integrated single chip SOA-SA module (SOASA) is particularly useful and can be manufactured by ion-implantation through one facet of a bulk laser diode chip with antireflection coatings on both sides. In order to maximize the transmission capacity an analytical model is required that describes the SOASA single pulse response as a function of relevant system and signal parameters. To achieve this goal we used the model established previously. This SOASA module was likewise used in our experiments. The crucial system parameters of the model are recovery time, saturation energy, small signal gain and Henry factor of both the SOA and the SA section. Based on the analytical response function expressions for temporal walk off, energy gain and spectral shift can be obtained.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126264850","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：