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10月16日外宾 ：Optical metrology for space-grade optics at UME

来源： 发布时间：2023-10-08【字体：大 中 小】

报告人：Prof. Humbet NASIBLI，TÜBİTAK National Metrology Institute, Gebze, Turkey

会议时间：2023年10月16日（周一）下午14：00

会议地点：溢智厅

报告内容：

Over the past decade, the Turkish government has launched various projects with a significant emphasis on space research. Within this context, projects related to different fields of space exploration have been initiated at TÜBİTAK UME. These projects encompass the development of atomic clocks suitable for deployment in space vehicles, as well as the establishment of a foundation for the metrological characterization of space-qualified optics. In this presentation, we will present the measurement test systems employed for assessing the optical absorption and laser damage threshold values of space-qualified optics in both atmospheric and vacuum environments. Additionally, we will present select measurement results obtained from these test systems. We conduct traceable optical absorption measurements at various wavelengths (490 nm, 532 nm, 640 nm, 1064 nm, 1070 nm) per ISO 11551 standards. Our Laser Calorimetry system operates with 1 ppm precision in vacuum and atmospheric conditions. Additionally, Photothermal Common-Path Interferometry assesses ultra-weak absorption (< 1 ppm) at the same wavelengths. Results will cover optical components like Fused Silica, BK7, SF11, zerodur, and dielectric coated mirrors. Our Laser Damage Threshold (LIDT) system follows ISO 21254 standards, assessing coatings at 1064 nm, 532 nm, 355 nm, and 266 nm. LIDT measurements for uncoated space optics will also be presented. Lastly, we'll introduce aging and conditioning protocols to evaluate space optics, especially thin film-coated ones, in the challenging ultraviolet (UV) region.

报告人简介：

Prof. Humbet Nasibli received the M.Sc. degree in physics from Baku State University, in 1992, and the Ph.D. degree in experimental physics and scientific instrumentation from the Institute of Photoelectronics (IoPh), Academy of Sciences of Azerbaijan, in 2000. From 1992 to 2001, he was an Optical Engineer with the Laser Spectroscopy division of IoPh. In 2001, he joined the Scientific and Technological Research Council of Turkey (TÜBİTAK), where from 2001 to 2004, he was a Senior Researcher with the National Metrology Institute of Turkey (UME), and from 2004 to 2016, a Chief Senior Researcher with the TUBITAK-UEKAE. He is currently a Chief Senior Researcher with the Temperature Standards Laboratory, UME, Gebze, Turkey. His current research interests include applied laser physics and infrared technologies, optical and thermal image processing, instrumentation and sensors for temperature and optical metrology.

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