Nanooptics  and photonics

The threshold of laser-induced damage of image sensors in open atmosphere
Matsnev I.V., Derzhypolska L.A.,  Derzhypolskyi A.G., Chumak O.O., Khodakovsky V.M., Negriyko A.M.
 Laser Spectroscopy Department, Institute of  Physics of the NAS of Ukraine. Prospect Nauki, 46, Kyiv-03039, Ukraine. 
E-mail: matsnev.igor@gmail.com 

 Studies on the action powerful laser radiation on image sensors are still of great interest regarding protection of sensors and opto-electronic devices, in spite of rather long history of these researches [1]. The new aspects of interactions of laser radiation and sensor matrices are related with permanent grows of electronic integration  and nanoscale sizes of single elements on microchips. The early well studied processes of interaction of powerful laser radiation with the bulk materials are not enough for the description of the details of interaction nano- pico- and femtosecond laser pulses with micro- and nanosized structure of optical sensor matrix. 
We are presented here the results of detailed studies of interaction of pulsed laser radiation with CCD and CMOS matrices in open atmosphere. The open atmosphere conditions is rather important for evaluation the practical energy threshold for damage of sensor at the field applications [2]. The experimental results of the action powerful laser light onto the image sensors at the open atmosphere are demonstrated. The estimations of atmosphere turbulence onto the threshold energy will be presented. The video camera operation damage without sensor surface structural damages was observed.   
The results could be used in the developments of the optical sensors protection measures and improvement of sensor robustness. 

1.	Schwarz B., Ritt G., Eberle B.. Impact of threshold assessment methods in laser-induced damage measurements using the examples of CCD, CMOS, and DMD // Appl. Optics – 2021. - 60. no.22. – P. F39-F49.
2.	Derzhypolska L.A, Derzhypolskyi A.G., Negriiko A.M. Peculiarities of propagation and long distance focusing of expanded Gaussian laser beams // 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL) – 2019.- P. 1-4.