Components and Packaging for Laser Systems V最新文献

{"title":"Front Matter: Volume 10899","authors":"","doi":"10.1117/12.2531302","DOIUrl":"https://doi.org/10.1117/12.2531302","url":null,"abstract":"","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116723322","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}

{"title":"Glass optics on polymer cost level by scalable mass production process based on wafer processing (Conference Presentation)","authors":"D. Hauschild, Dirk W. Bogs","doi":"10.1117/12.2509618","DOIUrl":"https://doi.org/10.1117/12.2509618","url":null,"abstract":"The optical characteristics and long-term stability are the key criteria to select glass for a wide range of optical applications. Nevertheless, current challenges in e.g. smart consumer applications and autonomous transportation are cost driven and polymer optics are the first choice for ten to hundred million pieces applications, so far. In combination with diode laser sources polymer optics can be used only for low power and low value applications. For a few Watts CW or 100 Watts QCW and more the safe and reliable operation even in a harsh environment has still a need for optics made of glass. Therefore, LIMO developed a non-sequential cold processing and polishing technology for cylindrical lenses with glass wafer that can reduce cost per processed mm² down to the polymer optics level. Similar like in microelectronics production, the use of large glass wafer in combination with simultaneous processing of all cylinder lenses increases productivity and reduces cost per mm². Beam shaping and collimation optics for edge emitter diodes and VCSEL can be produced now on the generation 5 substrate size of 300mm x 300mm. In addition, the development of higher grinding rates with constant geometrical shape was the key to scale the wafer size and reducing the turnaround times simultaneously. The resulting productivity went up more than ten times in comparison with the current generation 4 wafer. LIMO will present the production flow and high-speed grinding and polishing process in combination with wafer level testing and quality mapping processes to confirm the optical performance.","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"87 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":"124965423","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}

{"title":"Beam shaping of high pulse energy lasers (Conference Presentation)","authors":"A. Laskin, V. Laskin, Aleksei Ostrun","doi":"10.1117/12.2507619","DOIUrl":"https://doi.org/10.1117/12.2507619","url":null,"abstract":"High-power pulsed lasers are widely used in scientific and industrial applications, and control of irradiance distribution using beam shaping optics is important to increase efficiency of laser techniques. A popular approach of building optical systems is use of a refractive beam shaper and imaging optics afterwards to create resulting spot of required intensity profile and size in a working plane. Important feature of imaging optical systems is creating the image after the paraxial focal plane – this means focusing of a high energy pulse before the image plane and probable air break down disturbing the intensity distribution in image and reducing performance of entire system. This problem becomes especially actual with modern ultrashort pulse lasers which pulse energy is constantly rising. Specific requirements to beam shaping optics in these laser systems are providing variable irradiance distributions, saving of beam consistency and flatness of phase front, capability to work with TEM00 and multimode lasers, resistance to high peak power radiation. Among various refractive and diffractive beam shaping techniques only refractive field mapping beam shapers like piShaper meet these requirements. The operational principle of these devices presumes almost lossless transformation of laser beam irradiance from Gaussian to flat-top, super-Gauss or inverse-Gauss through controlled wavefront manipulation inside a beam shaper using lenses with smooth optical surfaces. To overcome the problem of eventual air break down by imaging after a beam shaper it is suggested to apply optical systems with field lenses, which main function is changing the focusing conditions without change of the system transverse magnification. This approach allows to “move” the point of pulse energy concentration from the image zone and increase the focus spot size in order to reduce probability of air break down or avoid it at all.\u0000This paper will describe some design basics of refractive beam shapers of the field mapping type and optical layouts of their applying in optical systems of high-power lasers. Examples of real implementations and experimental results will be presented as well.","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"43 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":"122607657","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}

{"title":"High power, high efficiency diode laser pumps at 976 nm and 1532 nm for high energy laser applications (Conference Presentation)","authors":"Jenna Campbell, M. Woodson, D. Kebort, Y. Dora, I. González, K. Guinn, P. Leisher, M. Mashanovitch, D. Renner","doi":"10.1117/12.2510205","DOIUrl":"https://doi.org/10.1117/12.2510205","url":null,"abstract":"High power, high efficiency diode lasers operating in the 15xx nm wavelength range are required for many applications, both in the military and in the commercial domains. Applications include eye-safe infrared illuminators, free-space optical (FSO) communication transmitters, LIDAR and range finder sources, as well as resonant pumping of Erbium-doped fiber or solid-state lasers for high energy lasers. In this paper, we will discuss our recent progress in developing high power, high efficiency stripe geometry and Master Oscillator Power Amplifier (MOPA) lasers operating at 1550 nm. MOPA lasers are fabricated in a monolithic platform in which we have engineered the epitaxial structure to mitigate Auger and other loss mechanisms. This device structure includes a single mode seed laser that feeds a tapered power amplifier. We have demonstrated single spatial mode performance of over 1 W output power (CW) and Electro-Optic (EO) power conversion efficiency of 44%. This EO efficiency is significantly higher than what is available today for 15xx nm lasers. The single spatial mode nature of these lasers has been verified through M^2 measurements. The MOPA shows a small-signal bandwidth >2GHz under direct modulation, offering a unique capability for free-space optical link applications. Stripe geometry lasers have been demonstrated generating in excess of 3 W output power (CW) with high EO efficiency (36%). While custom packaging is available, the MOPA lasers have been packaged into TO cans with collimating optics to enable easy integration into existing system architectures.","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"23 2 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":"128786069","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}

{"title":"How the design concepts of high-NA beam splitters and diffusers, as well as of beam shapers by freeform surfaces are related (Conference Presentation)","authors":"Site Zhang, Roberto Knoth, C. Hellmann, F. Wyrowski","doi":"10.1117/12.2509580","DOIUrl":"https://doi.org/10.1117/12.2509580","url":null,"abstract":"Tailored laser illumination systems play a major role in various industrial applications, ranging from laser-beam splitting and diffusing to generate signal patterns with large fields of view for face and movement recognition, to shaping the wavefront of a laser beam using freeform surfaces. Several design concepts are based on topology control of the shaping element to avoid strong phase jumps or to minimize phase vortices and control the speckles of the illumination pattern at the signal plane. Other techniques follow a local shaping approach of the phase to control the wavefront, either over the whole element or in specific regions, with said regions arranged periodically to generate e.g. micro-lens arrays or randomly to generate diffusers of continuous surface topology. In particular, we show how these techniques are related to each other and how they can be used to improve maximum efficiency, uniformity of the intensity distribution and to minimize the zeroth order for non-paraxial illumination by laser beams.","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"75 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":"127400325","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}

{"title":"Does collimation reduce the lifetime of broad area diode laser pumps? (Conference Presentation)","authors":"P. Leisher, E. Feigenbaum, R. Swertfeger, M. Boisselle, S. Patra, R. Deri, A. Jha, Chen Li, K. Pipe, P. Thiagarajan","doi":"10.1117/12.2513331","DOIUrl":"https://doi.org/10.1117/12.2513331","url":null,"abstract":"","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"10 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":"128034136","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}

{"title":"Bidirectional ring amplifier with twin pulses for high-power lasers (Conference Presentation)","authors":"Xiao Yuan, Tiancheng Yu, Xiang Zhang, Fan Gao","doi":"10.1117/12.2509228","DOIUrl":"https://doi.org/10.1117/12.2509228","url":null,"abstract":"High-energy, high-power laser system for inertial confinement fusion (ICF), such as National Ignition Facility (NIF), is large in size and expensive in construction. The multi-pass amplifier (MA) with the large aperture amplifiers is widely used in high-power laser systems, such as ICF drivers. The systems with MA usually have four features: square beam, single aperture, single pulse and unidirectional propagation, and the expensive preamplifier systems are required to compensate for the limited gain of the main amplifiers. The gain and the extraction efficiency are limited in part by the number of passes that the beam can make through the amplifiers. Besides, the laser system in the multi-pass amplifier should operate at much higher fluence to achieve high extraction efficiency, which results in a technical challenge in the damage of optical components under high-power lasers irradiation. To efficiently extract the stored energy with low injection energy at low laser fluence operation and make the system compact and reliable, a bidirectional ring amplifier (BRA) with twin pulses is proposed and discussed. The structure of the bidirectional ring amplifier is described. The characteristics of the bidirectional ring amplifier on extraction efficiency and output energy capability are simulated and discussed. The simulation results show that an extraction efficiency of 62.3% and the output energy of 13.4 kJ per pulse at the B integral limit can be obtained at low average fluence of 10.3 J/cm2 and the low injection energy of 3.9 mJ in the bidirectional ring amplifier. Compared with the multi-pass amplifier, the bidirectional ring amplifier is more compact and the extraction efficiency is much higher at low laser fluence operation, which is beneficial to reduce the effects of nonlinear phase shift. Furthermore, the preamplifier system for the bidirectional ring amplifier is simple, only a fiber oscillator and a regenerative amplifier can work.","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"138 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":"124484005","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}

{"title":"Photonic crystal fiber-based components for high power industrial Fs laser applications (Conference Presentation)","authors":"J. Boullet, S. Boivinet, C. Pierre, G. Machinet, Hugo Lecommandoux, E. Chalumeau, C. Vinçont, Kévin Robin, Michael Bérisset","doi":"10.1117/12.2513525","DOIUrl":"https://doi.org/10.1117/12.2513525","url":null,"abstract":"ALPhANOV has developed expertise around the interfacing and integration of specialty optical fibers. We propose to present new developments concerning 100W-class fiber laser based on Yb-doped Large Mode Area fiber amplifier and a new plug-and-play connector for ultrashort pulse beam delivery by using Hollow Core Photonic Crystal Fibers.\u0000In terms of high power fiber amplifier, we recently developed a high performance, fully monolithic PCF amplifier module. The module is based on the DC-200/40-PZ-Yb of NKT Photonics and on a homemade fiber fused component allowing us to couple up to 6 pumps of 50 W at 976 nm together with 5 W of signal, leading to an achieved power of 210 W at 1064 nm, which is to the best of our knowledge the highest power ever delivered by a fully monolithic PCF amplifier. The module is entirely thermally controlled in a rugged package and has run more than 100 days at > 100W average power with an excellent power stability < 1%. \u0000Concerning fiber beam delivery solution, hollow core photonic crystal fiber has shown great potential for an industrial solution. To penetrate the industry, high power femtosecond lasers need low-loss stable and plug-and-play connectors to couple light into hollow-core single-mode fibers and carry it to the target. We recently developed such connector and tested it on different industrial femtosecond laser, 50W and 100W class. The new design of the connector compatible with vacuum or noble gas and 300W class femtosecond laser will also be presented.","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"22 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":"132250131","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}

{"title":"100 Hz repetition rate, >2 PW/sr-cm2 highly brightness micro-MOPA within the paper size A3 (Conference Presentation)","authors":"T. Kawasaki, V. Yahia, T. Taira","doi":"10.1117/12.2514237","DOIUrl":"https://doi.org/10.1117/12.2514237","url":null,"abstract":"","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"14 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":"124603527","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}

{"title":"Bonding strength analysis for curing-in-the-loop precision bonding (Conference Presentation)","authors":"D. Zontar, M. Hoeren, T. Müller, S. Sauer, C. Brecher","doi":"10.1117/12.2510679","DOIUrl":"https://doi.org/10.1117/12.2510679","url":null,"abstract":"In micro-assembly of optical systems, active alignment can help to relax tolerances and guarantee optimal results for individual units by evaluating the actual system performance or suitable key-performance-indicators. Combined with capable micromanipulator technology bonding becomes the limiting factor in the overall assembly process. Due to unpredictable properties of the individual adhesive gap, volumetric shrinkage during curing is not sufficiently predictable for a robust compensation. In the past, Fraunhofer IPT presented curing-in-the-loop as a solution for increased precision in the bonding process. The measurement information from a preceding active alignment control loop can also serve as input during the bonding process. The observed and quantified shrinkage in the first moments of the curing process allows predicting the entire displacement due to volumetric shrinkage. A last correction step before the final curing dose leads the remaining shrinkage to approach the target pose. This curing-in-the-loop-strategy provides several parameters for tuning, which directly affect the achievable bonding strength. The segmentation in initial and final curing phase, the UV-doses, the time window to measure and evaluate and the amount of correction are just some examples. In this paper, we will present the bonding strategy and its parameters in detail and investigate the effects on the bonding strength of UV-cured adhesives. Especially the amount of correction during the curing process is an unknown process parameter.","PeriodicalId":429615,"journal":{"name":"Components and Packaging for Laser Systems V","volume":"26 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":"131313103","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}