Pub Date : 2001-11-12DOI: 10.1109/LEOS.2001.968938
J. Coleman, T. Yeoh
A method of maskless selective area epitaxy of InAs quantum dots using underlying InGaAs is presented. By using standard lithography techniques, selective area epitaxy of quantum dots was achieved on In/sub 0.20/Ga/sub 0.80/As layers with a QD density exceeding 3/spl times/10/sup 10/ cm/sup 2/. The advantage of this method lies in the lack of oxide or nitride mask material, allowing for a single regrowth process that is not complicated by any additional thermal dose or growth rate enhancement.
{"title":"Metalorganic vapor phase epitaxy of quantum dots","authors":"J. Coleman, T. Yeoh","doi":"10.1109/LEOS.2001.968938","DOIUrl":"https://doi.org/10.1109/LEOS.2001.968938","url":null,"abstract":"A method of maskless selective area epitaxy of InAs quantum dots using underlying InGaAs is presented. By using standard lithography techniques, selective area epitaxy of quantum dots was achieved on In/sub 0.20/Ga/sub 0.80/As layers with a QD density exceeding 3/spl times/10/sup 10/ cm/sup 2/. The advantage of this method lies in the lack of oxide or nitride mask material, allowing for a single regrowth process that is not complicated by any additional thermal dose or growth rate enhancement.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"13 1","pages":"560-561 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78435956","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 : 2001-11-12DOI: 10.1109/LEOS.2001.968876
D. Zhou, Tae-woo Lee, N. Tansu, S. Hagness, L. Mawst
To obtain a large near-field spot-size (i.e. narrow far-field FWHM), a narrow waveguide design is utilized in edge-emitting lasers to expand the transverse mode. A similar situation was observed for the lateral VCSEL mode for a very small aperture oxide-define waveguide structure. A narrow-waveguide VCSEL design incorporating a separate current confinement aperture is shown schematically. This design then allows one to adjust the optical overlap with the gain region by choosing the current aperture. The device is fabricated by two-step MOCVD growth.
{"title":"Large spot-size narrow waveguide VCSEL","authors":"D. Zhou, Tae-woo Lee, N. Tansu, S. Hagness, L. Mawst","doi":"10.1109/LEOS.2001.968876","DOIUrl":"https://doi.org/10.1109/LEOS.2001.968876","url":null,"abstract":"To obtain a large near-field spot-size (i.e. narrow far-field FWHM), a narrow waveguide design is utilized in edge-emitting lasers to expand the transverse mode. A similar situation was observed for the lateral VCSEL mode for a very small aperture oxide-define waveguide structure. A narrow-waveguide VCSEL design incorporating a separate current confinement aperture is shown schematically. This design then allows one to adjust the optical overlap with the gain region by choosing the current aperture. The device is fabricated by two-step MOCVD growth.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"26 1","pages":"469-470 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74899145","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 : 2001-11-12DOI: 10.1109/LEOS.2001.968896
K. Djordjev, S. Choi, S. Choi, P. Dapkus
Summary form only given. We demonstrate high Q vertically coupled passive microdisk resonators based on the InP material system as a first step towards utilizing active devices, and to understand the parameters limiting their performance. Vertical coupling is chosen because it exhibits two major advantages compared to the lateral geometry, namely: i) precise control of the coupling coefficient by epitaxial growth; ii) the material composition of the waveguides and resonator can be optimized and grown independently, which facilitates the design of active microdisk devices - ON/OFF switches, modulators and microdisk lasers.
{"title":"High-Q vertically-coupled microresonators built by wafer-bonding technique","authors":"K. Djordjev, S. Choi, S. Choi, P. Dapkus","doi":"10.1109/LEOS.2001.968896","DOIUrl":"https://doi.org/10.1109/LEOS.2001.968896","url":null,"abstract":"Summary form only given. We demonstrate high Q vertically coupled passive microdisk resonators based on the InP material system as a first step towards utilizing active devices, and to understand the parameters limiting their performance. Vertical coupling is chosen because it exhibits two major advantages compared to the lateral geometry, namely: i) precise control of the coupling coefficient by epitaxial growth; ii) the material composition of the waveguides and resonator can be optimized and grown independently, which facilitates the design of active microdisk devices - ON/OFF switches, modulators and microdisk lasers.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"30 1","pages":"509-510 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74996382","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 : 2001-11-12DOI: 10.1109/LEOS.2001.968966
Z. Yaqoob, J. Steedle, N.A. Riza
We have successfully designed and demonstrated a novel wide angular scan range, large diameter aperture optical beam scanner for ultrafast nanosecond scan setting speeds. The free-space wavelength multiplexed optical scanner (W-MOS) offers powerful scanner features in a compact and simple to build and control package leading to potentially wide spread use of this technology.
{"title":"Wide angle high speed large aperture optical scanner","authors":"Z. Yaqoob, J. Steedle, N.A. Riza","doi":"10.1109/LEOS.2001.968966","DOIUrl":"https://doi.org/10.1109/LEOS.2001.968966","url":null,"abstract":"We have successfully designed and demonstrated a novel wide angular scan range, large diameter aperture optical beam scanner for ultrafast nanosecond scan setting speeds. The free-space wavelength multiplexed optical scanner (W-MOS) offers powerful scanner features in a compact and simple to build and control package leading to potentially wide spread use of this technology.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"11 1","pages":"616-617 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76049494","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 : 2001-11-12DOI: 10.1109/LEOS.2001.969246
W. Kim, J. O'Brien
We report the use of the FEM to calculate the dispersion relation for a 2D photonic crystal lattice in a dielectric slab. Because it is difficult to build periodic structures in three dimensions, the lower dimensional slab structures are preferred and fabricated to demonstrate various types of photonic crystal devices such as a defect cavity laser and waveguide.
{"title":"A full vectorial finite element analysis of 2-D photonic crystal slabs","authors":"W. Kim, J. O'Brien","doi":"10.1109/LEOS.2001.969246","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969246","url":null,"abstract":"We report the use of the FEM to calculate the dispersion relation for a 2D photonic crystal lattice in a dielectric slab. Because it is difficult to build periodic structures in three dimensions, the lower dimensional slab structures are preferred and fabricated to demonstrate various types of photonic crystal devices such as a defect cavity laser and waveguide.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"11 1","pages":"208-209 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76227707","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 : 2001-11-12DOI: 10.1109/LEOS.2001.968995
S. Ryu, M. Yagi
The effectiveness of all-optical 2R-repeaters using optical limiters for DPSK WDM transmission systems is shown for alleviating the effect of the cross-phase modulation. It is confirmed that the scheme is effective for long-haul systems.
{"title":"Transmission performance improvement in differential phase-shift keying wavelength-division multiplexed transmission systems using all-optical 2R repeaters","authors":"S. Ryu, M. Yagi","doi":"10.1109/LEOS.2001.968995","DOIUrl":"https://doi.org/10.1109/LEOS.2001.968995","url":null,"abstract":"The effectiveness of all-optical 2R-repeaters using optical limiters for DPSK WDM transmission systems is shown for alleviating the effect of the cross-phase modulation. It is confirmed that the scheme is effective for long-haul systems.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"169 1","pages":"677-678 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75704167","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 : 2001-11-12DOI: 10.1109/LEOS.2001.969170
S. Owa, M. Doi, H. Kawai, H. Kitano, S. Miwa, H. Matsuura, A. Tokuhisa
One approach to compact UV light sources is an all-solid-state 193 nm laser system, which utilizes an Er-doped fiber amplifier (EDFA) of 1547 nm wavelength as part of the fundamental light source, and five-stage frequency conversion optics for generating the eighth harmonic of 193 nm light. We propose the use of Gd/sub x/Y/sub 1-x/Ca/sub 4/O(BO/sub 3/)/sub 3/ as the fourth-harmonic crystal to improve the wavelength conversion optics, and report the results of durability tests up to 500 hours.
{"title":"A 193 nm light source using fiber amplifier and nonlinear wavelength conversion","authors":"S. Owa, M. Doi, H. Kawai, H. Kitano, S. Miwa, H. Matsuura, A. Tokuhisa","doi":"10.1109/LEOS.2001.969170","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969170","url":null,"abstract":"One approach to compact UV light sources is an all-solid-state 193 nm laser system, which utilizes an Er-doped fiber amplifier (EDFA) of 1547 nm wavelength as part of the fundamental light source, and five-stage frequency conversion optics for generating the eighth harmonic of 193 nm light. We propose the use of Gd/sub x/Y/sub 1-x/Ca/sub 4/O(BO/sub 3/)/sub 3/ as the fourth-harmonic crystal to improve the wavelength conversion optics, and report the results of durability tests up to 500 hours.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"18 1","pages":"56-57 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74343454","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 : 2001-11-12DOI: 10.1109/LEOS.2001.969328
S. Cao, J. Cartledge
The experimental results are obtained using an integrated all-active three-port semiconductor optical amplifier Mach Zehnder interferometric (SOA-MZI) wavelength converter. An advantage of using counter-propagating signals is that an optical filter is not required at the output of the wavelength converter. Based on a detailed experimental characterization of the modulated ASE, it has been shown that any subsequent filtering that takes place must be considered in setting the operating point of the wavelength converter.
{"title":"Characterization of the modulated ASE noise in an SOA-MZI wavelength converter","authors":"S. Cao, J. Cartledge","doi":"10.1109/LEOS.2001.969328","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969328","url":null,"abstract":"The experimental results are obtained using an integrated all-active three-port semiconductor optical amplifier Mach Zehnder interferometric (SOA-MZI) wavelength converter. An advantage of using counter-propagating signals is that an optical filter is not required at the output of the wavelength converter. Based on a detailed experimental characterization of the modulated ASE, it has been shown that any subsequent filtering that takes place must be considered in setting the operating point of the wavelength converter.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"27 1","pages":"368-369 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74402531","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 : 2001-11-12DOI: 10.1109/LEOS.2001.969294
J. Ashcom, E. Mazur
After reviewing some of the fundamentals of surface and bulk damage in transparent materials, this talk will present an overview of work being done in our laboratory on tightly focusing femtosecond pulses into the bulk of transparent materials with an emphasis on materials processing and micromachining.
{"title":"Femtosecond laser-induced microexplosions in transparent materials","authors":"J. Ashcom, E. Mazur","doi":"10.1109/LEOS.2001.969294","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969294","url":null,"abstract":"After reviewing some of the fundamentals of surface and bulk damage in transparent materials, this talk will present an overview of work being done in our laboratory on tightly focusing femtosecond pulses into the bulk of transparent materials with an emphasis on materials processing and micromachining.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"1 1","pages":"300-301 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74858081","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 : 2001-11-12DOI: 10.1109/LEOS.2001.968881
W. Fischler, A. Richter, H. Bock, J. Elbers, C. Glingener
We report on experimental results of optical performance monitoring (OPM) in a transparent optical network transmitting channels modulated at 10 Gb/s. This experiment was performed in an entirely field installed DWDM ring network (DWDM ring capacity: 80/spl times/10 Gb/s) with configurable optical add drop multiplexers (OADMs) at different locations within the city of Berlin, Germany.
{"title":"Monitoring the optical performance in a transparent and configurable metro area network","authors":"W. Fischler, A. Richter, H. Bock, J. Elbers, C. Glingener","doi":"10.1109/LEOS.2001.968881","DOIUrl":"https://doi.org/10.1109/LEOS.2001.968881","url":null,"abstract":"We report on experimental results of optical performance monitoring (OPM) in a transparent optical network transmitting channels modulated at 10 Gb/s. This experiment was performed in an entirely field installed DWDM ring network (DWDM ring capacity: 80/spl times/10 Gb/s) with configurable optical add drop multiplexers (OADMs) at different locations within the city of Berlin, Germany.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"39 1","pages":"479-480 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79101284","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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