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- Jul 3010:30 AMCREOL Seminar: Paul Leisher, Luminar TechnologiesTitle: Progress in brightness, power, and efficiency of semiconductor lasers for high power applicationsAbstract: Semiconductor lasers are a key component in numerous emerging photonics-enabled technologies, including additive manufacturing, data centers for artificial intelligence, inertial navigation, optical power beaming, photon sail propulsion for interstellar probes, autonomous vehicles, rapid biomedical diagnostics, laser wakefield acceleration, fusion energy, and directed energy systems. In many of these applications, the laser is the most expensive, power-hungry, and failure-prone component. Engineering solutions to these challenges and driving continuous improvement are the keys to unlocking many photonics-enabled applications. Modern high power semiconductor lasers are extremely good at converting electricity into light (>70% wallplug efficiency) and are very cheap (<$1/watt), but these devices are fundamentally limited by low coherence and poor beam quality, which arise from effects such as thermal- and carrier-induced lensing. As a result, they are commonly used as pumps for solid-state and fiber lasers, rather than as direct sources. These systems could be greatly improved and simplified if semiconductor lasers could be directly utilized, but this can only be made possible by addressing the fundamental physical limitations of beam quality and coherence in a manner that does not compromise the semiconductor laser's inherent ability to scale power and brightness with high efficiency. This talk explores recent progress in the development of high performance semiconductor lasers. We will examine the physical mechanisms that limit power scalability, coherence, beam quality, and efficiency, and review semiconductor laser architectures designed to mitigate these effects. By pushing the limits of brightness and coherence, this research opens the door to more simplified, efficient, and robust laser systems to accelerate their deployment into next-generation technologies and enable new frontiers.About the Speaker: Paul Leisher is Vice President of Research and a Fellow at Luminar Technologies Inc. in Orlando, FL, where he is responsible for leading the company's research and development of laser sources for LIDAR. Prior to its acquisition by Luminar, he served as Vice President of Research at Freedom Photonics in Santa Barbara, CA where he was focused on the development of the world's highest brightness laser diodes. From 2017 to 2019, Dr. Leisher was Chief Engineer for Diode Lasers at Lawrence Livermore National Laboratory (Livermore, CA). From 2011-2017, Dr. Leisher served as Associate Professor of Physics and Optical Engineering at Rose-Hulman Institute of Technology (Terre Haute, IN) and as the Manager of Advanced Technology at nLight Corporation (Vancouver, WA) from 2007-2011. Dr. Leisher has worked as a consultant for numerous companies ranging from small domestic photonics startups to large multinational corporations in the automotive and industrial manufacturing fields. He received his B.S. degree in electrical engineering from Bradley University (Peoria, Illinois) in 2002, and M.S. and Ph.D. in electrical and computer engineering from the University of Illinois at Urbana-Champaign in 2004 and 2007, respectively.Dr. Leisher's research interests include the design, fabrication, characterization, and analysis of high-power semiconductor lasers and other photonic devices. He has served as principal investigator / principal business official on over $43M in research programs to date and authored/co-authored over 300 technical patents, journal articles, and conference presentations. Dr. Leisher developed and taught numerous university courses in optics and photonics. Dr. Leisher serves on the technical committee of many conferences and is an active reviewer for most journals in the field. He served as co-chair of the SPIE Components and Packaging for Laser Systems Conference for ten years, the program track chair for the SPIE LASE Symposium Nonlinear Optics and Beam Guiding conferences for five years, and the program chair and general chair of the International Semiconductor Laser Conference (ISLC) in 2022 and 2024, respectively. Dr. Leisher is a senior member of SPIE and IEEE.Virtual Location URL: https://ucf.zoom.us/j/94674435922?pwd=HGZ6wLdPUc1EkeWbLJww2bieeNNzke.1
- Jul 3011:00 AMAce your InterviewsIn this week's Workshop Wednesday with Career Services:Learn how to communicate your qualifications for an interview whether it be for a job, internship, research assistant, graduate school or other position. Be prepared with your laptop, a mobile device, tell a friend to join the session and be ready to learn how to prepare for your next interview.Register to attend in person or get the zoom link to attend virtually on Handshake: [bit.ly/UCFhandshake](bit.ly/UCFhandshake)[career.ucf.edu ](career.ucf.edu)Virtual Location URL: https://ucf.joinhandshake.com/events/1730072/share_preview Registration Link: https://ucf.joinhandshake.com/events/1730072/share_preview
- Jul 3011:00 AMBig Red Bus - Donate Blood or Platelets Today!Help us maintain a safe and ready blood supply for cancer patients, trauma patients, or when unexpected tragedies occur. The OneBlood bus will park on Memory Mall near the Veterans Memorial.Walk-ups are welcomed, and appointments are appreciated!Appointments for Blood Donation:Appointments for Platelet Donation: Registration Link: https://donor.oneblood.org/donor/schedules/drive_schedule/1632766 Registration Info: Save time - Schedule your appointment now!
- Jul 302:00 PMStaying Anchored, Soaring Higher: Get Ready for Fall/Spring Registration with Us!Staying Anchored, Soaring Higher is a workshop aimed at helping students get grounded at UCF and charge on to new heights! This workshop, Getting Ready for Fall Registration, will leave students confident and prepared to register for classes come their enrollment appointment, setting them up for another semester of success. Registration Link: https://linktr.ee/ucftransfercenter
- Jul 304:00 PMUCF Admissions Information SessionLed by an undergraduate admission counselor, this 45-minute information session will provide a broad introduction to UCF, explain the undergraduate application process and cover topics like admission requirements and merit scholarships. Prospective students and family members are welcome to attend. Questions are encouraged during and after the presentation.Virtual Location URL: https://ucf.zoom.us/meeting/register/tJIkc-GgqjIsHNbAlPka7izBp7xWPlCLEeKh Registration Link: https://ucf.zoom.us/meeting/register/tJIkc-GgqjIsHNbAlPka7izBp7xWPlCLEeKh Registration Info: This is a virtual information session hosted in Zoom. Registration is required.
- Jul 307:00 PMNarcotics AnonymousThis group meets every Wednesday. May meet outdoors during building closures for holidays.NA is a non-profit fellowship of men and women for whom drugs have become a major problem. We meet regularly to help each other live drug-free. There are no dues or fees, the only requirement for membership is a desire to stop using. Our fellowship focuses primarily on recovery from the disease of addiction. Anyone may join us regardless of age, race, sexual identity, creed, religion, or lack of religion.For more information about this meeting visit [studenthealth.ucf.edu/recovery/](https://studenthealth.ucf.edu/recovery/) or call the NA Helpline at 407-425-5157.
- Jul 3110:00 AMCritiques & Career Express In-Person Drop-In'sEvery Thursday during Summer B, you can stop by the Dixon Career Center and meet with a career peer advisor to help you with your resume, cover letter, linked in or professional profile or ask any quick career questions - no appointment needed.Just head inside and check in at the front desk any time 10 am - 1 pm!
- Aug 11:00 PMRosen College Virtual Visit DayGet a real-time look at what makes Rosen College so special, from our learning spaces to the incredible opportunities just steps away.You'll hear from current students, find out what's happening in the hospitality industry around us and see why we were ranked #1 in the world for hospitality and hotel management by CEOWorld Magazine.Join us for a virtual visit via Zoom on select Mondays and Fridays at 1 pm EST.Virtual Location URL: https://futureknight.apply.ucf.edu/portal/rosenvirtual Registration Link: https://futureknight.apply.ucf.edu/portal/rosenvirtual
- Aug 16:00 PMSummer 2025 Commencement | College of Arts and HumanitiesThe Summer 2025 Commencement Ceremony for the College of Arts and Humanities will take place on Friday, August 1, 2025, at 6:00 p.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 16:00 PMSummer 2025 Commencement | College of SciencesThe Summer 2025 Commencement Ceremony for the College of Sciences will take place on Friday, August 1, 2025, at 6:00 p.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 16:00 PMSummer 2025 Commencement | College of Undergraduate StudiesThe Summer 2025 Commencement Ceremony for the College of Undergraduate Studies will take place on Friday, August 1, 2025, at 6:00 p.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 29:00 AMSummer 2025 Commencement: College of Business AdministrationThe Summer 2025 Commencement Ceremony for the College of Business Administration will take place on Saturday, August 2, 2025, at 9:00 a.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 29:00 AMSummer 2025 Commencement | College of Engineering and Computer ScienceThe Summer 2025 Commencement Ceremony for the College of Engineering and Computer Science will take place on Saturday, August 2, 2025, at 9:00 a.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 29:00 AMSummer 2025 Commencement | College of Optics and PhotonicsThe Summer 2025 Commencement Ceremony for the College of Optics and Photonics will take place on Saturday, August 2, 2025, at 9:00 a.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 29:00 AMSummer 2025 Commencement | Rosen College of Hospitality ManagementThe Summer 2025 Commencement Ceremony for the Rosen College of Hospitality Management will take place on Saturday, August 2, 2025, at 9:00 a.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 22:30 PMSummer 2025 Commencement | College of Community Innovation and EducationThe Summer 2025 Commencement Ceremony for the College of Community Innovation and Education will take place on Saturday, August 2, 2025, at 2:30 p.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 22:30 PMSummer 2025 Commencement | College of Graduate StudiesThe Summer 2025 Commencement Ceremony for the College of Graduate Studies will take place on Saturday, August 2, 2025, at 2:30 p.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 22:30 PMSummer 2025 Commencement | College of Health Professions and SciencesThe Summer 2025 Commencement Ceremony for the College of Health Professions and Sciences will take place on Saturday, August 2, 2025, at 2:30 p.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 22:30 PMSummer 2025 Commencement | College of MedicineThe Summer 2025 Commencement Ceremony for the College of Medicine will take place on Saturday, August 2, 2025, at 2:30 p.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
- Aug 22:30 PMSummer 2025 Commencement | College of NursingThe Summer 2025 Commencement Ceremony for the College of Nursing will take place on Saturday, August 2, 2025, at 2:30 p.m. EDT. This commencement ceremony will take place in the [Addition Financial Arena](https://www.additionfiarena.com/).Visit our [Graduation Celebration website](https://www.ucf.edu/graduation/) and learn more about our spring ceremonies.
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