This article is cited in 2 papers

International Scientific and Technical Conference "Ultrafast Optical Phenomena". October 4-8, 2021, Moscow
Nonlinear optics

Measurement of two-photon absorption coefficient of 1030 nm ultrashort laser pulses on natural diamond color centers

Yu. S. Gulina

P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia

Abstract: An experimental study of nonlinear absorption process of ultrashort laser pulses in bulk of natural diamond has been carried out. The results of experimental studies on measuring nonlinear transmission of 1 mm thick plane-parallel plate made of diamond irradiated with focused by micro lens (NA = 0.55 with focal length $f'$ = 5 mm) 0.3 and 10 ps laser pulses with 1030 nm wavelength are presented. It is shown that in this sample the main attenuation mechanism of ultrashort laser pulses with 1030 nm wavelength at intensities not exceeding 10 TW/cm$^2$ is two-photon absorption at color centers, the absorption coefficient $\beta_2$ = 4.1 $\pm$ 0.3 cm/TW is determined.

Keywords: femtosecond laser pulses, nonlinear absorption, natural diamond, multiphoton absorption, color centers.

Received: 20.12.2021
Revised: 20.12.2021
Accepted: 30.12.2021

DOI: 10.21883/OS.2022.04.52269.60-21

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