Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Study on fatigue damage characteristics of deformable mirrors under thermal-mechanical coupling effect

Not Accessible

Your library or personal account may give you access

Abstract

In a wavefront correction process, both the mechanical effect and the irradiation of a high-power continuous-wave laser distort the deformable mirror (DM) surface, which inevitably speeds up the fatigue damage of the DM. By utilizing the stress analysis model for the fatigue damage of the DM, the fatigue damage effects are analyzed quantitatively on the consideration of thermal-mechanical coupling effects, and the fatigue life prediction model has further been proposed based on the S-N curve and Miner cumulative damage theory. On this basis, thermal-mechanical conditions have been analyzed, and the influence of laser parameters on the fatigue life of the DM has also been discussed in detail. The results indicate that the increasing of maximum temperature rise of the DM leads to the increasing of stress, and further brings about the decreasing of the fatigue life. Meanwhile, the position at the rear surface of the DM subjected to the maximum stress always presents the minimum fatigue life. Furthermore, the laser irradiation makes the DM more easily damaged when the DM is correcting a distorted wavefront, and the fatigue life decreases with the increasing of irradiation time and power density for a given peak and valley (PV) value of the corrected wavefront. Additionally, the fatigue life also decreases with the increasing of power density and the decreasing of spot radius for a certain total irradiation. On the other hand, for the given laser parameters, the influence of the mechanical effect on fatigue life is gradually apparent with increasing PV value of the corrected wavefront, and when the PV value is more than 2λ, the mechanical effect instead of the thermal effect becomes the key factor for fatigue damage of the DM.

© 2016 Optical Society of America

Full Article  |  PDF Article
More Like This
Fatigue characteristics of deformable mirrors caused by fatigue of lead zirconate titanate

Jiaqiu Wang, Shuai Luo, Fang Ling, Zheqiang Zhong, and Bin Zhang
Appl. Opt. 57(35) 10102-10108 (2018)

Thermal shock and fatigue lifetime characteristics of ceramic Nd:YAG

Duck-Lae Kim and Byung-Tai Kim
Appl. Opt. 60(21) 6170-6176 (2021)

Continuous-wave laser damage mechanism of a spectral combining grating

Jiao Xu, Junming Chen, Peng Chen, Yonglu Wang, Yibin Zhang, Fanyu Kong, Hongchao Cao, Yunxia Jin, and Jianda Shao
Appl. Opt. 58(10) 2551-2555 (2019)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (11)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved