汇报题目：参加OPTICS and PHOTONICS International Congress 2018参会报告

汇报时间：2018年5月3日(星期四) 19:00

汇报地点：曲江校区西五楼A424

汇报人：肖华攀

会议名称：OPTICS and PHOTONICS International Congress 2018

会议时间：23-28, 2018

会议地点：Yokohama, Japan.

会议简介：

The objective of OPIC2018 (OPTICS and PHOTONICS International Congress 2018) is to discuss the future of our society which will be realized by optics and photonics, based on the most updated knowledge and technologies worldwide, presented at OPIC2018 and OPIE’18 (OPTICS and PHOTONICS International Exhibition 2018).

OPIC was launched in April 2012 at Pacifico Yokohama, and is the only annual optics and photonics international congress in Japan held under close cooperation between academia and industry. OPIC2018 is the 7th Congress, comprised of Specialized International Conferences, covering a broad range of fields which are all very active at present.

The number of the Specialized International conferences held within OPIC, as well as the number of the participants, have been increasing each year since the start of OPIC. Most recently, OPIC2017 was held with 12 Specialized International Conferences, that is the largest number since the beginning of OPIC, and the participants exceeded more than 1,000, from 32 countries.

会议交流工作

Oral presentation: Effect of micro-crack and reaction product on laser damage performance of optical glass during chemical etching

报告人：肖华攀

参加论文信息

Title: Effect of micro-crack and reaction product on laser damage performance of optical glass during chemical etching

Author: Huapan Xiao, Zhi Chen, Hairong Wang, Rongguang Liang, Na Yu, Jiuhong Wang

Abstract: Chemical etching is usually utilized to improve the laser damage performance of optical glass by mitigating micro-cracks, while it inevitably produces some reaction products (RPs). In this paper, two K9 glasses with good quality and two K9 glasses with micro-cracks are etched, statically or dynamically (high-frequency ultrasonic agitation). The morphologies of cracks and RPs are characterized, and the laser-induced damage thresholds (LIDTs) are measured. The results show that with the increase of etching time, the LIDT increases slightly at first and then decreases gradually for the glass with RPs, and the LIDT increases at first and then stabilizes for the glass without RPs. Using finite-difference time-domain method, the light intensities around crack, RP and their combination are simulated, respectively. The results indicate that the light intensity enhancement factor (LIEF) increases at first and then decreases with the decrease of crack aspect ratio, and the LIEF increases with RP radius. The LIEF for the combination is generally larger than that for one crack or one RP, which greatly depends on the relative distance between the crack and the RP. Experimental and simulated results complement each other, revealing the influence mechanism of crack and RP on the LIDT. This work would contribute to improving the LIDT of optical glass by chemical etching.