Pub Date : 2001-11-12DOI: 10.1109/LEOS.2001.969084
D. Panasenko, Y. Fainman
We present an experimental setup capable of performing single-shot interferometric correlation of infrared femtosecond pulses using two-photon conductivity in a standard silicon CCD. We demonstrate the operation of the apparatus using 100 fsec pulses from the optical parametric amplifier (OPA) operating at 1.4 /spl mu/m.
{"title":"Single-shot interferometric correlator for ultrashort laser pulses based on nonlinear absorption in a silicon CCD","authors":"D. Panasenko, Y. Fainman","doi":"10.1109/LEOS.2001.969084","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969084","url":null,"abstract":"We present an experimental setup capable of performing single-shot interferometric correlation of infrared femtosecond pulses using two-photon conductivity in a standard silicon CCD. We demonstrate the operation of the apparatus using 100 fsec pulses from the optical parametric amplifier (OPA) operating at 1.4 /spl mu/m.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"17 1","pages":"853-854 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84218251","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.2001.968883
K. M. Patel, S. E. Ralph
We have developed a detection technique to reduce the effect of DMD without sacrificing the advantages, such as alignment tolerance and ease of manufacturing, related to the use of multimode fiber. Our method is a simple implementation of spatially resolved equalization (SRE) that doubles the bandwidth of MMF links. Using an overfilled launch condition, we exploit the spatial diversity of the optical signal emitted from the MMF. We use a SRE detector, an InGaAs metal-semiconductor-metal (MSM) device placed 400 /spl mu/m from the fiber end.
{"title":"Spatially resolved detection for enhancement of multimode-fiber-link performance","authors":"K. M. Patel, S. E. Ralph","doi":"10.1109/LEOS.2001.968883","DOIUrl":"https://doi.org/10.1109/LEOS.2001.968883","url":null,"abstract":"We have developed a detection technique to reduce the effect of DMD without sacrificing the advantages, such as alignment tolerance and ease of manufacturing, related to the use of multimode fiber. Our method is a simple implementation of spatially resolved equalization (SRE) that doubles the bandwidth of MMF links. Using an overfilled launch condition, we exploit the spatial diversity of the optical signal emitted from the MMF. We use a SRE detector, an InGaAs metal-semiconductor-metal (MSM) device placed 400 /spl mu/m from the fiber end.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"16 1","pages":"483-484 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84903411","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.2001.969109
S. Cundiff, Jun Ye, J. L. Hall
Recently there has been a remarkable convergence between ultrafast laser technology and precision optical frequency metrology, two fields that at first glance seem very disparate. This has led to a paradigm shift in optical frequency metrology by replacing complex frequency chains with a single modelocked laser. It has also enabled the first generation of optical clocks. It promises to have future impact on ultrafast physics, particularly extreme nonlinear optics and coherent control. The basic concepts for self-reference detection and stabilization of modelocked lasers are presented. Recent measurements using this technique are reviewed and the time domain implications demonstrated.
{"title":"Time meets frequency: phase stabilization of ultrafast pulses and optical frequency metrology with modelocked lasers","authors":"S. Cundiff, Jun Ye, J. L. Hall","doi":"10.1109/LEOS.2001.969109","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969109","url":null,"abstract":"Recently there has been a remarkable convergence between ultrafast laser technology and precision optical frequency metrology, two fields that at first glance seem very disparate. This has led to a paradigm shift in optical frequency metrology by replacing complex frequency chains with a single modelocked laser. It has also enabled the first generation of optical clocks. It promises to have future impact on ultrafast physics, particularly extreme nonlinear optics and coherent control. The basic concepts for self-reference detection and stabilization of modelocked lasers are presented. Recent measurements using this technique are reviewed and the time domain implications demonstrated.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"2 1","pages":"903 vol.2-"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84906411","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.2001.969187
Y. Wen, H. Liu, D. Novak, A. Nirmalathas
Summary form only given. We propose and demonstrate all optical clock recovery at line rates by narrowband modulation of a single mode monolithic laser diode. This scheme does not require an intracavity saturable absorber, and the recovered clock signal exhibits a large locking range and large tolerance to variations in operating parameters.
{"title":"All optical clock recovery at line rates by narrowband modulation of a single mode laser diode","authors":"Y. Wen, H. Liu, D. Novak, A. Nirmalathas","doi":"10.1109/LEOS.2001.969187","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969187","url":null,"abstract":"Summary form only given. We propose and demonstrate all optical clock recovery at line rates by narrowband modulation of a single mode monolithic laser diode. This scheme does not require an intracavity saturable absorber, and the recovered clock signal exhibits a large locking range and large tolerance to variations in operating parameters.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"3 1","pages":"89-90 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84925205","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.2001.969214
A. Yokoo, M. Notomi, H. Suzuki, M. Nakao, T. Tamamura, H. Masuda
An alumina nanohole array is composed of highly ordered nanoholes with a high aspect ratio (Masuda et al, 1997). The array is considered to be two-dimensional (2D) photonic crystal, and a photonic band gap has been confirmed (Masuda et al, 1999 and 2000). Fabrication of point defects or line defects in an alumina nanohole array is an attractive approach to achieve a functional photonic crystal-like photonic band-gap laser. Selective injection of nanoholes with functional polymer enables us to obtain such point defects. In this paper, we demonstrate the fabrication of functional defects in an alumina nanohole array by selective polymer injection and emission from the defect level in the photonic band gap.
氧化铝纳米孔阵列由高纵横比的高度有序的纳米孔组成(Masuda et al, 1997)。该阵列被认为是二维(2D)光子晶体，并且已经证实存在光子带隙(Masuda et al, 1999和2000)。在氧化铝纳米孔阵列中制造点缺陷或线缺陷是实现功能光子晶体类光子带隙激光器的一种有吸引力的方法。选择性注入功能聚合物的纳米孔使我们能够获得这样的点缺陷。在本文中，我们展示了在氧化铝纳米孔阵列中通过选择性聚合物注入和从光子带隙中的缺陷水平发射来制造功能缺陷。
{"title":"Emission from the defect level in alumina nanohole array photonic crystal with selective injection of functional polymer","authors":"A. Yokoo, M. Notomi, H. Suzuki, M. Nakao, T. Tamamura, H. Masuda","doi":"10.1109/LEOS.2001.969214","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969214","url":null,"abstract":"An alumina nanohole array is composed of highly ordered nanoholes with a high aspect ratio (Masuda et al, 1997). The array is considered to be two-dimensional (2D) photonic crystal, and a photonic band gap has been confirmed (Masuda et al, 1999 and 2000). Fabrication of point defects or line defects in an alumina nanohole array is an attractive approach to achieve a functional photonic crystal-like photonic band-gap laser. Selective injection of nanoholes with functional polymer enables us to obtain such point defects. In this paper, we demonstrate the fabrication of functional defects in an alumina nanohole array by selective polymer injection and emission from the defect level in the photonic band gap.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"1 1","pages":"145-146 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85648771","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.2001.969172
J. Mackenzie, S. Mitchell, R. Beach, C. Li, H. Meissner, D. Shepherd
Summary form only given. We present results for a planar direct-bonded double-clad waveguide comprised of a Tm:YAG core, undoped YAG inner-cladding, and sapphire outer-cladding layers. The YAG/sapphire numerical aperture is sufficient to capture most of the highly divergent radiation of a laser diode, thus allowing a side-pumped arrangement with two proximity-coupled /spl lambda//sub p/=785 nm, 20 W diode bars. This simple and efficient pumping scheme, combined with the thin waveguide dimension, leads to a high pumping intensity, as required for efficient operation of quasi-three-level laser systems.
{"title":"15 W diode-pumped Tm:YAG double-clad waveguide laser","authors":"J. Mackenzie, S. Mitchell, R. Beach, C. Li, H. Meissner, D. Shepherd","doi":"10.1109/LEOS.2001.969172","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969172","url":null,"abstract":"Summary form only given. We present results for a planar direct-bonded double-clad waveguide comprised of a Tm:YAG core, undoped YAG inner-cladding, and sapphire outer-cladding layers. The YAG/sapphire numerical aperture is sufficient to capture most of the highly divergent radiation of a laser diode, thus allowing a side-pumped arrangement with two proximity-coupled /spl lambda//sub p/=785 nm, 20 W diode bars. This simple and efficient pumping scheme, combined with the thin waveguide dimension, leads to a high pumping intensity, as required for efficient operation of quasi-three-level laser systems.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"280 1","pages":"60-61 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77131868","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.2001.968961
C.J. Mackechnie, S. Ferretti, A. Barlow
This paper has suggested that the standard method of measuring PMD by interferometry is inadequate. In particular it fails to address the presence of both random and deterministic PMD in a fibre. Such a situation can lead to erroneous results. This paper has shown that one method of detecting this situation is by use of the FT properties of convolution.
{"title":"A method of distinguishing combined mode coupling regimes when polarisation mode dispersion is measured by the interference method","authors":"C.J. Mackechnie, S. Ferretti, A. Barlow","doi":"10.1109/LEOS.2001.968961","DOIUrl":"https://doi.org/10.1109/LEOS.2001.968961","url":null,"abstract":"This paper has suggested that the standard method of measuring PMD by interferometry is inadequate. In particular it fails to address the presence of both random and deterministic PMD in a fibre. Such a situation can lead to erroneous results. This paper has shown that one method of detecting this situation is by use of the FT properties of convolution.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"101 1","pages":"606-607 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80857512","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.2001.969279
N. Hatori, M. Sugawara, T. Akiyama, Y. Nakata
We measured and compared frequency chirp between a quantum dot laser and a quantum well laser. The chirp of the quantum dot laser was below 0.5 GHz, and it was much smaller than that of the quantum well laser. This is, to our knowledge, the first direct quantitative evaluation of frequency chirp in a quantum dot laser.
{"title":"Low frequency chirp self-assembled InGaAs/GaAs quantum dot lasers","authors":"N. Hatori, M. Sugawara, T. Akiyama, Y. Nakata","doi":"10.1109/LEOS.2001.969279","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969279","url":null,"abstract":"We measured and compared frequency chirp between a quantum dot laser and a quantum well laser. The chirp of the quantum dot laser was below 0.5 GHz, and it was much smaller than that of the quantum well laser. This is, to our knowledge, the first direct quantitative evaluation of frequency chirp in a quantum dot laser.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"18 1","pages":"271-272 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83589848","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.2001.969324
Jian He, Xu Wang, K. Chan
A novel scheme that can simultaneously realize all-optical tunable wavelength conversion (W-C) and re-amplifying and re-shaping (2R) regeneration has been proposed. Preliminary experimental results indicate that all-optical tunable W-C and re-shaping can be obtained in the above scheme within the gain spectrum of the SOA employed. Further improvements in the output power are desirable.
{"title":"Tunable all-optical wavelength conversion and 2R regeneration based on semiconductor-fiber ring laser","authors":"Jian He, Xu Wang, K. Chan","doi":"10.1109/LEOS.2001.969324","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969324","url":null,"abstract":"A novel scheme that can simultaneously realize all-optical tunable wavelength conversion (W-C) and re-amplifying and re-shaping (2R) regeneration has been proposed. Preliminary experimental results indicate that all-optical tunable W-C and re-shaping can be obtained in the above scheme within the gain spectrum of the SOA employed. Further improvements in the output power are desirable.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"65 1","pages":"360-361 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79518120","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.2001.969043
Y. Kang, P. Mages, A. Pauchard, A. Clawson, S. Lau, Y. Lo, P. Yu
Mesa type fused InGaAs/Si separated absorption and multiplication APDs with a diameter of 130 /spl mu/m have been fabricated on n-type Si substrate. Substantial dark current reduction has been achieved compared with the published data for fused InGaAs/Si APDs. Dark current densities as low as 0.23 mA/cm/sup 2/ at -5 V and 3 mA/cm/sup 2/ at a gain of 10 are reported. Our improved dark current even though is still 2 orders larger than the conventional mesa-structure InGaAs/InP APD lower excess noise level is expected due to the larger difference between the electron and hole ionization coefficients of Si.
{"title":"Dark current reduction in fused InGaAs/Si avalanche photodiode","authors":"Y. Kang, P. Mages, A. Pauchard, A. Clawson, S. Lau, Y. Lo, P. Yu","doi":"10.1109/LEOS.2001.969043","DOIUrl":"https://doi.org/10.1109/LEOS.2001.969043","url":null,"abstract":"Mesa type fused InGaAs/Si separated absorption and multiplication APDs with a diameter of 130 /spl mu/m have been fabricated on n-type Si substrate. Substantial dark current reduction has been achieved compared with the published data for fused InGaAs/Si APDs. Dark current densities as low as 0.23 mA/cm/sup 2/ at -5 V and 3 mA/cm/sup 2/ at a gain of 10 are reported. Our improved dark current even though is still 2 orders larger than the conventional mesa-structure InGaAs/InP APD lower excess noise level is expected due to the larger difference between the electron and hole ionization coefficients of Si.","PeriodicalId":18008,"journal":{"name":"LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242)","volume":"34 1","pages":"772-773 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84168468","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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