Acousto-optically Q-switched Er:YAP laser emitting at 2.8μm

Richard Švejkar; Dominika Popelová; Jan Šulc; Helena Jelínková

doi:10.1117/12.2665614

9 June 2023 Acousto-optically Q-switched Er:YAP laser emitting at 2.8μm

Richard Švejkar, Dominika Popelová, Jan Šulc, Helena Jelínková

Proceedings Volume 12577, High-power, High-energy Lasers and Ultrafast Optical Technologies; 125770F (2023) https://doi.org/10.1117/12.2665614
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Conference Poster

Abstract

The free-running and acousto-optically Q-switched laser properties of Er:YAP crystal, which is appropriate for generation at 2.8 μm, are presented. The sample of Er:YAP (concentration 5 at.% of Er3+, thickness 9 mm) had plan-parallel polished faces without antireflection coatings. The excitation of Er:YAP crystal was carried out by a laser diode emitting at 973 nm and working in a pulsed regime (pulse duration 5 ms, repetition rate 10 Hz). The laser resonator was hemispherical, 150 mm in length, with a flat pumping mirror (HR @ 2.8 μm) and a spherical output coupler (r = 150 mm, R = 95 % @ 2.5 - 2.9 μm). In the free-running laser regime, the maximum output power of 156 mW and slope efficiency of 17 % with respect to absorbed pumped power were obtained. To obtain a Q-switching laser operation, the acousto-optic germanium element was inserted between the Er:YAP crystal and the output coupler. The shortest pulse duration of 36.2 ns with a repetition rate of 10 Hz and maximum pulse energy of 0.43 μJ were obtained. The emitted laser wavelength of 2.8 μm can be used as a pump source at room-temperature for Fe:ZnSe or in mid-infrared spectroscopy.

Citation Download Citation

Richard Švejkar, Dominika Popelová, Jan Šulc, and Helena Jelínková "Acousto-optically Q-switched Er:YAP laser emitting at 2.8μm", Proc. SPIE 12577, High-power, High-energy Lasers and Ultrafast Optical Technologies, 125770F (9 June 2023); https://doi.org/10.1117/12.2665614

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available