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2019 IEEE High Power Diode Lasers and Systems Conference (HPD)最新文献

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Measurement of facet optical absorption in high power diode lasers using thermoreflectance 利用热反射率测量高功率二极管激光器的表面光吸收
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938681
A. Jha, P. Leisher, Chen Li, K. Pipe, M. Crowley, D. Fullager, J. Helmrich, P. Thiagarajan, R. Deri, R. Swertfeger
{"title":"Measurement of facet optical absorption in high power diode lasers using thermoreflectance","authors":"A. Jha, P. Leisher, Chen Li, K. Pipe, M. Crowley, D. Fullager, J. Helmrich, P. Thiagarajan, R. Deri, R. Swertfeger","doi":"10.1109/hpd48113.2019.8938681","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938681","url":null,"abstract":"Severe heating due to partial absorption of outcoupled emission at the facet of a high-power diode laser can lead to catastrophic optical damage. The degree of absorption and subsequent heating at the facet is a function of the emission wavelength, the absorption properties of facet coatings and passivation layers, and the age of the device. The ability to quantify facet absorption is an essential step toward improving the reliability of diode laser systems and rapid development of passivation technologies. In this work, we have developed a technique to measure facet absorption in diode lasers using a combination of facet thermoreflectance imaging and a heat transport model. The approach can be used for a wide range of both coated and uncoated diode lasers.","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"111 3S 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123998741","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}
引用次数: 1
Applications of thermoreflectance imaging to high-power diode laser diagnostics 热反射成像在大功率二极管激光诊断中的应用
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938679
K. Pipe, R. Swertfeger, P. Leisher, A. Jha, Chen Li, M. Crowley, D. Fullager, J. Helmrich, P. Thiagarajan, R. Deri, E. Feigenbaum
{"title":"Applications of thermoreflectance imaging to high-power diode laser diagnostics","authors":"K. Pipe, R. Swertfeger, P. Leisher, A. Jha, Chen Li, M. Crowley, D. Fullager, J. Helmrich, P. Thiagarajan, R. Deri, E. Feigenbaum","doi":"10.1109/hpd48113.2019.8938679","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938679","url":null,"abstract":"Thermoreflectance imaging enables noncontact mapping of surface temperature with high spatial resolution and high temperature resolution in electronic and optoelectronic devices. Recently we have applied charge-coupled device (CCD) based thermoreflectance imaging to study facet heating in high-power diode lasers. Sources of facet heating we have examined include back-irradiance as well as optical absorption of laser light at the outcoupling facet prior to emission. For the latter we have combined temperature measurements with a thermal model to derive facet optical absorption and have studied its evolution as the device ages.","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114638088","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}
引用次数: 2
Microscopic degradation and failure processes in high-power diode lasers 高功率二极管激光器的微观退化和失效过程
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938678
J. Souto, J. L. Pura, J. Jiménez
{"title":"Microscopic degradation and failure processes in high-power diode lasers","authors":"J. Souto, J. L. Pura, J. Jiménez","doi":"10.1109/hpd48113.2019.8938678","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938678","url":null,"abstract":"In this work we analyse the microscopic issues of the catastrophic optical damage (COD) of high power laser diodes. The COD is studied in terms of local heating of the active zone of the laser, which becomes an internal heat source fed by the absorption of the laser radiation generated in the cold cavity. The root causes of the formation of the hot spot in the QW are discussed, distinguishing between the COD induced by step tests and the long term COD. The role of the physical properties, optical absorption, thermal conductivity, mechanical strength and refractive index are considered in relation to the occurrence of COD. Also a comment about the reasons for the higher strength of the strained QWs is included. The analysis of the process is based in the thermomechanical modeling developed in the last years.","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133882954","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}
引用次数: 0
Traveling-wave simulations of broad-area lasers 广域激光的行波模拟
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938680
A. Zeghuzi, H. Wünsche, H. Wenzel, J. Koester, M. Radziunas, U. Bandelow, A. Knigge
{"title":"Traveling-wave simulations of broad-area lasers","authors":"A. Zeghuzi, H. Wünsche, H. Wenzel, J. Koester, M. Radziunas, U. Bandelow, A. Knigge","doi":"10.1109/hpd48113.2019.8938680","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938680","url":null,"abstract":"We present a physics-based tool for the numerical simulation of high-power broad-area edge-emitting diode lasers that self consistently couples heat transport to a dynamic electro-optical model. Due to the different time scales, an iterative coupling scheme is used. A good qualitative agreement between simulated and measured beam parameters is obtained.","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123805332","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}
引用次数: 0
Thermal boundary resistance between GaAs and p-side metal as limit to high power diode lasers 砷化镓与p侧金属之间的热边界电阻是高功率二极管激光器的限制
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938674
J. Rieprich, G. Blume, A. Ginolas, S. Arslan, R. Kernke, J. Tomm, K. Paschke, P. Crump
{"title":"Thermal boundary resistance between GaAs and p-side metal as limit to high power diode lasers","authors":"J. Rieprich, G. Blume, A. Ginolas, S. Arslan, R. Kernke, J. Tomm, K. Paschke, P. Crump","doi":"10.1109/hpd48113.2019.8938674","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938674","url":null,"abstract":"Studies are presented on the anomalously high thermal boundary resistance observed in efficient high power diode lasers between the p-side contact and metal submount. This barrier is responsible for a thermal resistance of around 1 K/W (around 40% of total) and its elimination would significantly improve the beam quality and power in high power devices. First, we show that no barrier is observed on the n-side even up to high CW heat flux levels (to $sim 2$ kW/cm$^{mathbf {2}}$), confirming a p-side effect. Second, a 10-fold variation in the thermal conductivity of the submount material (from CuW to CVD diamond) is shown to have minimal impact on the measured thermal barrier, thermal resistance and curvature in the thermal lens, confirming a chip-internal effect. The measured variation in thermal lens was reproduced in simulation only when a boundary resistance was included. These results are further evidence that the thermal boundary resistance is related to material limits on heat transport out of the p-side of the devices.","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130920570","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}
引用次数: 1
Double-asymmetric-structure 1.5 μ m high power laser diodes 双非对称结构1.5 μ m高功率激光二极管
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938671
L. Hallman, B. Ryvkin, E. Avrutin, A. Aho, J. Viheriälä, M. Guina, J. Kostamovaara
{"title":"Double-asymmetric-structure 1.5 μ m high power laser diodes","authors":"L. Hallman, B. Ryvkin, E. Avrutin, A. Aho, J. Viheriälä, M. Guina, J. Kostamovaara","doi":"10.1109/hpd48113.2019.8938671","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938671","url":null,"abstract":"Design considerations for high pulsed power and brightness 1.5 $mu$ m laser emitters for laser radar applications, based on comprehensive semi-analytical theory, are presented. A strongly asymmetric waveguide design with a bulk active layer positioned very near the p-emitter interface is chosen to minimize the current-induced losses at high power while maintaining a single, broad transverse mode. Moderate to high doping of the n-side of the Optical Confinement Layer and high p-doping of the p-cladding layer are used to reduce the residual current-induced losses and the electric resistance of the structure. For pulsed room-temperature operation, short laser resonators are found to be advantageous. First experimental results are presented. An as-cleaved sample with a stripe width of90 $mu$ m and a resonator2 mm long exhibits an output power of about 18 W at a pumping current amplitude of 80 A, with 1 mm long resonators showing higher power output. Further improvements are predicted by structure optimization as well as increase in internal quantum efficiency and thermal performance.","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124016095","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}
引用次数: 4
High-power 1.5μm laser diodes for LIDAR applications 用于激光雷达的高功率1.5μm激光二极管
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938669
J. Viheriälä, A. Aho, T. Uusitalo, J. Lyytikäinen, L. Hallman, B. Ryvkin, E. Avrutin, J. Kostamovaara, M. Guina
{"title":"High-power 1.5μm laser diodes for LIDAR applications","authors":"J. Viheriälä, A. Aho, T. Uusitalo, J. Lyytikäinen, L. Hallman, B. Ryvkin, E. Avrutin, J. Kostamovaara, M. Guina","doi":"10.1109/hpd48113.2019.8938669","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938669","url":null,"abstract":"We report on the development of high peak power laser diodes emitting in the $1.5 mu mathrm {m}$ wavelength band for eye-safe LIDAR applications. Different techniques for wavelength locking to and operation with a narrow emission spectrum are discussed. Furthermore, we review the strategies to increase the beam brightness. Recent progress in new epitaxial layer designs enabling high peak powers is also discussed. Finally, we discuss the performance of the laser diodes in terms of improvements they render possible for high-performance LIDAR systems.","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124036955","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}
引用次数: 2
HPD 2019 Conference Committee HPD 2019会议委员会
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938602
{"title":"HPD 2019 Conference Committee","authors":"","doi":"10.1109/hpd48113.2019.8938602","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938602","url":null,"abstract":"","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117352617","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}
引用次数: 0
HPD 2019 Programme HPD 2019计划
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938670
{"title":"HPD 2019 Programme","authors":"","doi":"10.1109/hpd48113.2019.8938670","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938670","url":null,"abstract":"","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"32 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134093156","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}
引用次数: 0
The requirements on pulsed laser diodes for use in atmospheric LiDAR 大气激光雷达对脉冲激光二极管的要求
2019 IEEE High Power Diode Lasers and Systems Conference (HPD) Pub Date : 2019-10-01 DOI: 10.1109/hpd48113.2019.8938672
S. Victori
{"title":"The requirements on pulsed laser diodes for use in atmospheric LiDAR","authors":"S. Victori","doi":"10.1109/hpd48113.2019.8938672","DOIUrl":"https://doi.org/10.1109/hpd48113.2019.8938672","url":null,"abstract":"Atmospheric LiDAR wavelength range covers from the UV to the thermal infrared. Depending on the main application, the specification in terms of power, repetition rate, spectral width, coherence length temperature dependence, peak power, pulse duration are very wide. This paper presents the different types of atmospheric LiDAR already existing with their sources. It emphasizes on the specifications of the laser sources and defines the specifications of laser diode in replacement of the standard laser sources.","PeriodicalId":384472,"journal":{"name":"2019 IEEE High Power Diode Lasers and Systems Conference (HPD)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133031541","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}
引用次数: 2
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