Guoli Liu, S. Lehkonen, Zuntu Xu, Jingwei Li, H. Winhold, S. Govorkov, H. Kissel, J. Biesenbach
We present recent progress of high power 808nm to 1060 nm laser bar operating at both CW and QCW operation. At CW operation, we demonstrate 50FF4.0 mm 940nm to 1060 nm bar can achieve up to 300W output power at 300A with high TE purity on MCCP package. At QCW operation, the 808nm 80FF1.5 mm bar can achieve 600W output power at both 25oC and 75oC on standard CCP; and the 75FF3.0 mm 940nm and 970nm bar can achieve 1KW at 1KA. We will also present results of our 808nm ~ 970nm QCW bar at ns region up to multi KA drive.
本文介绍了808nm ~ 1060nm高功率连续波和连续波激光器的最新进展。在连续工作中，我们证明了50FF4.0 mm 940nm至1060nm棒在MCCP封装上可以在300A下实现高达300W的输出功率，并且具有高TE纯度。在QCW工作时，808nm 80FF1.5 mm棒在标准CCP上在25℃和75℃下均可实现600W输出功率;而75FF3.0 mm 940nm和970nm棒在1KA时可以达到1KW。我们还将展示我们的808nm ~ 970nm QCW棒在ns区域的结果，直到多KA驱动。
{"title":"High power 808nm to 1060nm CW and QCW laser diode bars (Conference Presentation)","authors":"Guoli Liu, S. Lehkonen, Zuntu Xu, Jingwei Li, H. Winhold, S. Govorkov, H. Kissel, J. Biesenbach","doi":"10.1117/12.2523782","DOIUrl":"https://doi.org/10.1117/12.2523782","url":null,"abstract":"We present recent progress of high power 808nm to 1060 nm laser bar operating at both CW and QCW operation. At CW operation, we demonstrate 50FF4.0 mm 940nm to 1060 nm bar can achieve up to 300W output power at 300A with high TE purity on MCCP package. At QCW operation, the 808nm 80FF1.5 mm bar can achieve 600W output power at both 25oC and 75oC on standard CCP; and the 75FF3.0 mm 940nm and 970nm bar can achieve 1KW at 1KA. We will also present results of our 808nm ~ 970nm QCW bar at ns region up to multi KA drive.","PeriodicalId":136614,"journal":{"name":"High-Power Diode Laser Technology XVII","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126595464","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}
GaAs-based high-power diode lasers are the world’s most efficient light sources and generate the optical energy for the largest and fastest growing laser market: material processing. The performance of these key components is improving dramatically, driven by advances in material quality, process technology and design capability. FBH’s studies to improve the understanding of the physics and material properties that limit performance are an essential part of this development. An overview will be presented, detailing how power, efficiency and beam quality have been improved over the past 20 years, and showing the path to further performance scaling.
{"title":"High Power Laser Diodes: Improvements in Power, Efficiency, and Brilliance (Conference Presentation)","authors":"G. Tränkle","doi":"10.1117/12.2517037","DOIUrl":"https://doi.org/10.1117/12.2517037","url":null,"abstract":"GaAs-based high-power diode lasers are the world’s most efficient light sources and generate the optical energy for the largest and fastest growing laser market: material processing. The performance of these key components is improving dramatically, driven by advances in material quality, process technology and design capability. FBH’s studies to improve the understanding of the physics and material properties that limit performance are an essential part of this development. An overview will be presented, detailing how power, efficiency and beam quality have been improved over the past 20 years, and showing the path to further performance scaling.","PeriodicalId":136614,"journal":{"name":"High-Power Diode Laser Technology XVII","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116303981","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}
Jung-Tack Yang, Young Hyun Kim, Jae Bong Lee, D. Bang, Tae-Kyung Kim, W. Choi
{"title":"Dependence of high-power laser diode performance on emitter width (Conference Presentation)","authors":"Jung-Tack Yang, Young Hyun Kim, Jae Bong Lee, D. Bang, Tae-Kyung Kim, W. Choi","doi":"10.1117/12.2507712","DOIUrl":"https://doi.org/10.1117/12.2507712","url":null,"abstract":"","PeriodicalId":136614,"journal":{"name":"High-Power Diode Laser Technology XVII","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123171375","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}
M. Riva, G. Rossi, F. Pescarmona, A. Braglia, G. Perrone
Efficient laser processing of high reflective materials, such as copper and gold, requires shorter wavelengths than those currently used for high power industrial applications, with blue being the optimal choice. However, the limited power of currently available blue laser chips poses important challenges in scaling the power to the required hundreds of watts while preserving the highest possible beam quality. The paper presents a new proprietary patent-pending architecture that allows achieving world record blue laser brilliance using commercially available high power lasers in TO9 package. The developed architecture is based on single emitters for best flexibility and reliability, which are organized in rows staggered along the fast axis; each row can then be placed side by side to other rows in order to spatially multiplex also along the slow axis. The optimized design gave a final architecture based on 3 rows for a total of 36 emitters that could be coupled into a 105 µm / 0.22 NA. Exploiting also polarization multiplexing and using commercially available 3.5 W diodes it is possible to obtain 220 W of coupled power into a 105 µm / 0.22 NA fiber, for a record brilliance of 150 GW/(ster m2). Following an accurate design phase some prototypes have been fabricated and characterized. Detailed results are presented at the Conference.
高效激光加工高反射材料，如铜和金，需要比目前用于高功率工业应用的波长更短的波长，蓝色是最佳选择。然而，目前可用的蓝色激光芯片的有限功率对将功率扩展到所需的数百瓦同时保持尽可能高的光束质量提出了重要挑战。本文提出了一种正在申请专利的新专利架构，该架构允许在TO9封装中使用市售的高功率激光器实现世界纪录的蓝色激光亮度。开发的架构是基于单一发射器，以获得最佳的灵活性和可靠性，这些发射器沿着快速轴错开排列;然后，每一行可以与其他行并排放置，以便沿着慢轴进行空间复用。优化后的设计给出了基于3排共36个发射器的最终架构，这些发射器可以耦合到105 μ m / 0.22 NA中。利用极化多路复用技术并使用市上可用的3.5 W二极管，可以在105 μ m / 0.22 NA的光纤中获得220 W的耦合功率，达到150 GW/(ster m2)的创纪录亮度。在精确的设计阶段之后，一些原型被制造出来并进行了表征。会议将介绍详细的结果。
{"title":"High-power and brightness 105-micron fiber coupled blue laser diode modules (Conference Presentation)","authors":"M. Riva, G. Rossi, F. Pescarmona, A. Braglia, G. Perrone","doi":"10.1117/12.2510535","DOIUrl":"https://doi.org/10.1117/12.2510535","url":null,"abstract":"Efficient laser processing of high reflective materials, such as copper and gold, requires shorter wavelengths than those currently used for high power industrial applications, with blue being the optimal choice. However, the limited power of currently available blue laser chips poses important challenges in scaling the power to the required hundreds of watts while preserving the highest possible beam quality. The paper presents a new proprietary patent-pending architecture that allows achieving world record blue laser brilliance using commercially available high power lasers in TO9 package. The developed architecture is based on single emitters for best flexibility and reliability, which are organized in rows staggered along the fast axis; each row can then be placed side by side to other rows in order to spatially multiplex also along the slow axis. The optimized design gave a final architecture based on 3 rows for a total of 36 emitters that could be coupled into a 105 µm / 0.22 NA. Exploiting also polarization multiplexing and using commercially available 3.5 W diodes it is possible to obtain 220 W of coupled power into a 105 µm / 0.22 NA fiber, for a record brilliance of 150 GW/(ster m2). Following an accurate design phase some prototypes have been fabricated and characterized. Detailed results are presented at the Conference.","PeriodicalId":136614,"journal":{"name":"High-Power Diode Laser Technology XVII","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123178325","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}
S. Sauer, T. Müller, D. Zontar, M. Hoeren, M. Berger, C. Brecher
Fast axis collimator (FAC) to Chip in the assembly of High Power Diode Lasers (HPDL) systems is state of the art done in active alignment. Micro manipulators and (semi-) automated machines are available for purchase on the market. Neither the precision of the manipulation tools (step resolution < 10 nm) nor the measurement systems utilized in active alignment algorithms (alignment precision of ~50 nm) are the quality limiting factors but the bonding process is. This is due to the volumetric shrinkage of fast curing UV-adhesives in the curing process. The objective of this work is to reduce the absolute volume of adhesives in optical systems by smart design of the glue glap so no significant misalignment while curing is expected. The assertion is that the overall system quality is improved with the implementation of additional adhesive gaps if the amount of adhesive is reduced in this way. In high quality systems as HPDL this approach is state of the art with the implementation of FAC lens on Bottom tab. In other industries as automotive sensors that are drastically reducing component tolerances and improving system quality this approach is rather unknown. Results of glue gap reduction for HPDL assembly is described in this work by combining active alignment of FAC to edge emitter with a tolerance compensated individualized FAC on bottom tab subassembly in a fully automated production process. The approach was described in the papers [SPIE 10086-28] and [SPIE 10514-38]. Furthermore the approach of systemizing the smart glue gap design is done.
{"title":"Smart adhesive gap design to minimize volumetric shrinkage misalignment effects in the automated assembly of FAC to Bottom Tab subassemblies (Conference Presentation)","authors":"S. Sauer, T. Müller, D. Zontar, M. Hoeren, M. Berger, C. Brecher","doi":"10.1117/12.2511050","DOIUrl":"https://doi.org/10.1117/12.2511050","url":null,"abstract":"Fast axis collimator (FAC) to Chip in the assembly of High Power Diode Lasers (HPDL) systems is state of the art done in active alignment. Micro manipulators and (semi-) automated machines are available for purchase on the market. Neither the precision of the manipulation tools (step resolution < 10 nm) nor the measurement systems utilized in active alignment algorithms (alignment precision of ~50 nm) are the quality limiting factors but the bonding process is. This is due to the volumetric shrinkage of fast curing UV-adhesives in the curing process.\u0000The objective of this work is to reduce the absolute volume of adhesives in optical systems by smart design of the glue glap so no significant misalignment while curing is expected.\u0000The assertion is that the overall system quality is improved with the implementation of additional adhesive gaps if the amount of adhesive is reduced in this way. In high quality systems as HPDL this approach is state of the art with the implementation of FAC lens on Bottom tab. In other industries as automotive sensors that are drastically reducing component tolerances and improving system quality this approach is rather unknown.\u0000Results of glue gap reduction for HPDL assembly is described in this work by combining active alignment of FAC to edge emitter with a tolerance compensated individualized FAC on bottom tab subassembly in a fully automated production process. The approach was described in the papers [SPIE 10086-28] and [SPIE 10514-38].\u0000Furthermore the approach of systemizing the smart glue gap design is done.","PeriodicalId":136614,"journal":{"name":"High-Power Diode Laser Technology XVII","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125714169","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}
A. Hanafi, H. Erdl, P. Rudy, J. Raring, Julian A. Carey
Modern vehicle lighting systems are intended to improve safety on the road by providing the adequate visibility to the drivers under different driving conditions from within a compact housing. Using a high-power semipolar GaN-based blue laser diode (>3W) that pumps a yellow phosphor in a remote position, BMW and SLD co-developed a new high-luminance white point-like source having a peak brightness of over 1000 cd/mm², which is 10 times than that of high-power white LEDs. This results in extending the range of the visibility to the maximum regulatory photometric values (~600m) and in enhancing the contrast of different light distributions in the far-field. New lighting functions, devoted to guiding, assistance and communication, for example between self-driving vehicles and pedestrians, require variable, free patterned light distributions that are clearly perceivable by the driver and/or pedestrians. One way to achieve them is through the use of high-luminance, dynamic light sources with a higher luminous flux and a higher “automotive” lifetime. Such sources should enable a relatively high resolution in the far-field. Multiple efficient, high-power semi-polar blue laser emitters have therefore to be integrated in a thermo-optically stable package. Different patterns are generated on an optimized structured phosphor that is excited by a moving blue laser spot. This dynamic is enabled by a robust, compact, fast beam steering MEMS mirror. The pattern is projected in the far-field using a customized secondary optical system. Eye safety measures that ensure a safe usage in the vehicle and in the manufacturing sites, have to be implemented in such sources.
{"title":"High-brightness laser-based White light sources for automotive lighting applications (Conference Presentation)","authors":"A. Hanafi, H. Erdl, P. Rudy, J. Raring, Julian A. Carey","doi":"10.1117/12.2513381","DOIUrl":"https://doi.org/10.1117/12.2513381","url":null,"abstract":"Modern vehicle lighting systems are intended to improve safety on the road by providing the adequate visibility to the drivers under different driving conditions from within a compact housing. Using a high-power semipolar GaN-based blue laser diode (>3W) that pumps a yellow phosphor in a remote position, BMW and SLD co-developed a new high-luminance white point-like source having a peak brightness of over 1000 cd/mm², which is 10 times than that of high-power white LEDs. This results in extending the range of the visibility to the maximum regulatory photometric values (~600m) and in enhancing the contrast of different light distributions in the far-field. New lighting functions, devoted to guiding, assistance and communication, for example between self-driving vehicles and pedestrians, require variable, free patterned light distributions that are clearly perceivable by the driver and/or pedestrians. One way to achieve them is through the use of high-luminance, dynamic light sources with a higher luminous flux and a higher “automotive” lifetime. Such sources should enable a relatively high resolution in the far-field. Multiple efficient, high-power semi-polar blue laser emitters have therefore to be integrated in a thermo-optically stable package. Different patterns are generated on an optimized structured phosphor that is excited by a moving blue laser spot. This dynamic is enabled by a robust, compact, fast beam steering MEMS mirror. The pattern is projected in the far-field using a customized secondary optical system. Eye safety measures that ensure a safe usage in the vehicle and in the manufacturing sites, have to be implemented in such sources.","PeriodicalId":136614,"journal":{"name":"High-Power Diode Laser Technology XVII","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131593612","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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