Pub Date : 2000-09-10DOI: 10.1109/CLEOE.2000.910244
G. D’Alessandro, A. Scroggie, G. Oppo
Summary form only given. The use of synchronously pumped optical parametric oscillators (SPOPOs), as sources of both tunable laser radiation and short pulses, is becoming more and more widespread. It has been found that for suitable mismatch between the pump repetition period and the resonated pulse cavity round trip time, the resonated pulse can be considerably (up to 20 times) shorter than the pump pulse. We present numerical results on the quality and stability of pulses generated in this pulse compression regime.
{"title":"Suppression of pulse jitter in synchronously pumped optical parametric oscillators","authors":"G. D’Alessandro, A. Scroggie, G. Oppo","doi":"10.1109/CLEOE.2000.910244","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910244","url":null,"abstract":"Summary form only given. The use of synchronously pumped optical parametric oscillators (SPOPOs), as sources of both tunable laser radiation and short pulses, is becoming more and more widespread. It has been found that for suitable mismatch between the pump repetition period and the resonated pulse cavity round trip time, the resonated pulse can be considerably (up to 20 times) shorter than the pump pulse. We present numerical results on the quality and stability of pulses generated in this pulse compression regime.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"48 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":"130443729","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.2000.910302
G. Bellomonte, A. Grisard, L. Bécouarn, E. Lallier
Summary form only given. Owing to its nonlinear optical properties, periodically poled lithium niobate (PPLN) has recently attracted attention. Most results dealt with 500 /spl mu/m thick substrates, but several applications demand higher apertures to get high energy mid-IR pulses. However, few reports on thicker PPLN have been published. In the present work, high quality 1 mm-thick and 20 mm-long samples have been fabricated with grating periods ranging from 27 to 30 /spl mu/m due to ferroelectric domain inversion under high electric field. Once polished and AR-coated, those crystals have been used to demonstrate room temperature optical parametric oscillation.
{"title":"High efficiency mid-infrared optical parametric oscillation in thick periodically poled lithium niobate","authors":"G. Bellomonte, A. Grisard, L. Bécouarn, E. Lallier","doi":"10.1109/CLEOE.2000.910302","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910302","url":null,"abstract":"Summary form only given. Owing to its nonlinear optical properties, periodically poled lithium niobate (PPLN) has recently attracted attention. Most results dealt with 500 /spl mu/m thick substrates, but several applications demand higher apertures to get high energy mid-IR pulses. However, few reports on thicker PPLN have been published. In the present work, high quality 1 mm-thick and 20 mm-long samples have been fabricated with grating periods ranging from 27 to 30 /spl mu/m due to ferroelectric domain inversion under high electric field. Once polished and AR-coated, those crystals have been used to demonstrate room temperature optical parametric oscillation.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"42 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":"127877344","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.2000.910059
Q. Cao, H. Baker, D. Hall
Summary form only given. Using pulse widths between 1 and 20 /spl mu/s and materials which are strongly absorbing at the 10.6 /spl mu/m wavelength, the penetration depth of heating can be minimised whilst avoiding the severe plasma screening effects associated with sub-microsecond irradiation. We present development of the RF excited planar waveguide technology to produce sealed-off, static gas sources for this intermediate processing window. We have developed a 7-pass CO/sub 2/ planar waveguide amplifier system aimed at providing high peak power, short duration laser pulses of good beam quality.
只提供摘要形式。使用脉冲宽度在1到20 /spl μ m /s之间，材料在10.6 /spl μ m波长处具有强吸收，加热的穿透深度可以最小化，同时避免与亚微秒辐射相关的严重等离子体筛选效应。我们介绍了射频激发平面波导技术的发展，为这个中间处理窗口生产密封的静态气源。我们开发了一种7通CO/sub 2/平面波导放大器系统，旨在提供高峰值功率，短持续时间的高光束质量激光脉冲。
{"title":"High repetition rate microsecond pulse generation for material processing using a planar waveguide CO/sub 2/ MOPA system","authors":"Q. Cao, H. Baker, D. Hall","doi":"10.1109/CLEOE.2000.910059","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910059","url":null,"abstract":"Summary form only given. Using pulse widths between 1 and 20 /spl mu/s and materials which are strongly absorbing at the 10.6 /spl mu/m wavelength, the penetration depth of heating can be minimised whilst avoiding the severe plasma screening effects associated with sub-microsecond irradiation. We present development of the RF excited planar waveguide technology to produce sealed-off, static gas sources for this intermediate processing window. We have developed a 7-pass CO/sub 2/ planar waveguide amplifier system aimed at providing high peak power, short duration laser pulses of good beam quality.","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":"131313686","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.2000.909968
H. Baker, G. Markillie, F. Villarreal, Q. Cao, P. R. Murray, P. Field, K. Nowak, C. Janke, D. Hall
Summary form only given. This paper explores methods of improving the glass machining capabilities of sealed-off, pulsed RF, slab waveguide CO/sub 2/ lasers. Such devices offer a wide range of pulse durations (/spl tau//sub p/), pulse repetition frequencies (PRF's) and peak powers. In quartz and soda lime glass, the 10.6 /spl mu/m laser wavelength has an absorption depth of a few microns and a reflection coefficient of /spl sim/10%. This enables rapid prototyping of inexpensive refractive micro-optics with machining rates ranging from 10 to 50 /spl mu/m per shot. In a preliminary study, we successfully machined a cylindrical refractive micro-lens using a commercially available CO/sub 2/ slab waveguide laser.
{"title":"Rapid prototyping of refractive micro-optics using slab waveguide CO/sub 2/ lasers","authors":"H. Baker, G. Markillie, F. Villarreal, Q. Cao, P. R. Murray, P. Field, K. Nowak, C. Janke, D. Hall","doi":"10.1109/CLEOE.2000.909968","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909968","url":null,"abstract":"Summary form only given. This paper explores methods of improving the glass machining capabilities of sealed-off, pulsed RF, slab waveguide CO/sub 2/ lasers. Such devices offer a wide range of pulse durations (/spl tau//sub p/), pulse repetition frequencies (PRF's) and peak powers. In quartz and soda lime glass, the 10.6 /spl mu/m laser wavelength has an absorption depth of a few microns and a reflection coefficient of /spl sim/10%. This enables rapid prototyping of inexpensive refractive micro-optics with machining rates ranging from 10 to 50 /spl mu/m per shot. In a preliminary study, we successfully machined a cylindrical refractive micro-lens using a commercially available CO/sub 2/ slab waveguide laser.","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":"129033030","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.2000.909999
A. Zvyagin, J. B. Fitzgerald, K. Silva, D. Sampson
Summary form only. Colour Doppler optical coherence tomography (CDOCT) has recently shown great promise in two-dimensional, high-spatial-resolution (on the order of tens of microns) tomographic velocity mapping of blood in living tissue. CDOCT is based on optical interference in a scanning Michelson interferometer under broadband illumination. When a scattering object is in motion, it generates a signal in the detection circuit, an interferogram, the envelope of which gives the spatial reflectivity, and the frequency of which is proportional to the sum of the object's velocity and that of the reference arm scatter. In this paper, we present a novel detection scheme, based on an electronic phase-locked loop (PLL).
{"title":"Method for real time colour Doppler optical coherence tomography","authors":"A. Zvyagin, J. B. Fitzgerald, K. Silva, D. Sampson","doi":"10.1109/CLEOE.2000.909999","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909999","url":null,"abstract":"Summary form only. Colour Doppler optical coherence tomography (CDOCT) has recently shown great promise in two-dimensional, high-spatial-resolution (on the order of tens of microns) tomographic velocity mapping of blood in living tissue. CDOCT is based on optical interference in a scanning Michelson interferometer under broadband illumination. When a scattering object is in motion, it generates a signal in the detection circuit, an interferogram, the envelope of which gives the spatial reflectivity, and the frequency of which is proportional to the sum of the object's velocity and that of the reference arm scatter. In this paper, we present a novel detection scheme, based on an electronic phase-locked loop (PLL).","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"69 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":"129258055","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.2000.909765
G. Cheriaus, J. Rousseau, J. P. Chumbaret, P. Balcou, V. Laude, L. Vigroux
Summary form only given. The increasing peak power of laser chains based on the chirped pulse amplification leads to the use of a compressor or a part of the compressor under vacuum in order to avoid the nonlinear effect when the pulse has been fully recompressed. We propose an alternative solution that is to replace the compressor under vacuum by a compressor in the air combined with a set of chirped mirrors that is under vacuum. The "air-compressor" will be aligned such that the residual spectral phase after the chirped mirror's set will be minimized in order to obtain the optimal pulse duration.
{"title":"Hybrid compressor for terawatt level laser chain","authors":"G. Cheriaus, J. Rousseau, J. P. Chumbaret, P. Balcou, V. Laude, L. Vigroux","doi":"10.1109/CLEOE.2000.909765","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909765","url":null,"abstract":"Summary form only given. The increasing peak power of laser chains based on the chirped pulse amplification leads to the use of a compressor or a part of the compressor under vacuum in order to avoid the nonlinear effect when the pulse has been fully recompressed. We propose an alternative solution that is to replace the compressor under vacuum by a compressor in the air combined with a set of chirped mirrors that is under vacuum. The \"air-compressor\" will be aligned such that the residual spectral phase after the chirped mirror's set will be minimized in order to obtain the optimal pulse duration.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"52 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":"125482959","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.2000.909661
S. Chénais, F. Druon, F. Balembois, P. Georges, A. Brun, M. Zavelani‐Rossi, F. Augé, J. Chambaret, F. Mougel, D. Vivien
Summary form only given. We present diode-pumped Yb:GdCOB laser producing 3.2 W CW at 1043 nm with a slope efficiency of 68% and an optical-to-optical conversion efficiency of 36%.
{"title":"3-W, diode-pumped, tunable, CW Yb:GdCOB laser","authors":"S. Chénais, F. Druon, F. Balembois, P. Georges, A. Brun, M. Zavelani‐Rossi, F. Augé, J. Chambaret, F. Mougel, D. Vivien","doi":"10.1109/CLEOE.2000.909661","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.909661","url":null,"abstract":"Summary form only given. We present diode-pumped Yb:GdCOB laser producing 3.2 W CW at 1043 nm with a slope efficiency of 68% and an optical-to-optical conversion efficiency of 36%.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"372 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":"126711606","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.2000.910290
J. McInersey, P. O'Brien, P. Skovgaard, J. Houlihan, E. O'Neill, J. O'Callaghan
Summary form only given. High power semiconductor lasers have applications in spectroscopy, telecommunications, manufacturing and materials processing medicine, free space communication or energy transfer. Powers of /spl sim/1 W or more require large apertures /spl sim/100 pm which lead to high order transverse modes, filamentation and spatio-temporal instabilities, all of which degrade spatial coherence and therefore brightness. In this paper we describe recent theoretical and experimental research to develop laser structures and resonators to suppress filamentation and high order transverse mode oscillation. We have fabricated and analysed broad area lasers, unstable resonators, and flared lasers.
{"title":"High brightness semiconductor lasers by inhomogeneous pumping","authors":"J. McInersey, P. O'Brien, P. Skovgaard, J. Houlihan, E. O'Neill, J. O'Callaghan","doi":"10.1109/CLEOE.2000.910290","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910290","url":null,"abstract":"Summary form only given. High power semiconductor lasers have applications in spectroscopy, telecommunications, manufacturing and materials processing medicine, free space communication or energy transfer. Powers of /spl sim/1 W or more require large apertures /spl sim/100 pm which lead to high order transverse modes, filamentation and spatio-temporal instabilities, all of which degrade spatial coherence and therefore brightness. In this paper we describe recent theoretical and experimental research to develop laser structures and resonators to suppress filamentation and high order transverse mode oscillation. We have fabricated and analysed broad area lasers, unstable resonators, and flared lasers.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"40 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":"126814373","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.2000.910340
A. Boudrioua, J. Loulergue, P. Moretti, B. Jacquier, G. Aka, D. Vivien
Summary form only. In this paper we report on detailed studies of cw blue laser beam generation in Ca/sub 4/GdO(BO/sub 3/)/sub 3/ (GdCOB) waveguides using type I non critical phase matching. The GdCOB waveguides are produced by using a triple-energy He+-implant. In these conditions low-loss waveguides are obtained.
{"title":"CW blue-light second-harmonic generation from Ti:sapphire pumping in ion-implanted Ca/sub 4/GdO(BO/sub 3/)/sub 3/ (GdCOB) waveguides","authors":"A. Boudrioua, J. Loulergue, P. Moretti, B. Jacquier, G. Aka, D. Vivien","doi":"10.1109/CLEOE.2000.910340","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910340","url":null,"abstract":"Summary form only. In this paper we report on detailed studies of cw blue laser beam generation in Ca/sub 4/GdO(BO/sub 3/)/sub 3/ (GdCOB) waveguides using type I non critical phase matching. The GdCOB waveguides are produced by using a triple-energy He+-implant. In these conditions low-loss waveguides are obtained.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"2 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":"123340842","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.2000.910194
E. Hasman, V. Kleiner, N. Davidson, A. Friesem
Summary form only. Light stripe triangulation configuration based on a color-coded arrangement allows parallel, fast, real-time 3-D surface profilometry with an extended depth-measuring range and high axial and lateral resolution. The method exploits polychromatic illumination and a cylindrical element that disperses the incident light along the axis, leading to an increased depth-measuring range without any decrease in the axial or the lateral resolution. In our recent experiments the cylindrical element was a combined diffractive-refractive optical element in which many light stripes, each of a different wavelength, are simultaneously focused at different focal lengths, forming a rainbow light sheet. The discrimination of each color stripe was further improved by a color decoding technique, in which a spectral filter simultaneously matched the entire wavelength distribution of the light sheet during detection. A 20-fold increase in the depth of focus was experimentally obtained, while diffraction-limited light stripes with extremely small sidelobes were completely maintained.
{"title":"Color-coded optical profilometry with >10/sup 6/ optically resolved depth steps","authors":"E. Hasman, V. Kleiner, N. Davidson, A. Friesem","doi":"10.1109/CLEOE.2000.910194","DOIUrl":"https://doi.org/10.1109/CLEOE.2000.910194","url":null,"abstract":"Summary form only. Light stripe triangulation configuration based on a color-coded arrangement allows parallel, fast, real-time 3-D surface profilometry with an extended depth-measuring range and high axial and lateral resolution. The method exploits polychromatic illumination and a cylindrical element that disperses the incident light along the axis, leading to an increased depth-measuring range without any decrease in the axial or the lateral resolution. In our recent experiments the cylindrical element was a combined diffractive-refractive optical element in which many light stripes, each of a different wavelength, are simultaneously focused at different focal lengths, forming a rainbow light sheet. The discrimination of each color stripe was further improved by a color decoding technique, in which a spectral filter simultaneously matched the entire wavelength distribution of the light sheet during detection. A 20-fold increase in the depth of focus was experimentally obtained, while diffraction-limited light stripes with extremely small sidelobes were completely maintained.","PeriodicalId":250878,"journal":{"name":"Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505)","volume":"11 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":"126560936","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：