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µJ-level multi-cycle terahertz generation in a periodically poled Rb:KTP crystal

Optics Letters, ISSN: 1539-4794, Vol: 46, Issue: 4, Page: 741-744
2021
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Article Description

We demonstrate multi-cycle terahertz (MC-THz) generation in a 15.5 mm long periodically poled rubidium (Rb)-doped potassium titanyl phosphate (Rb:PPKTP) crystal with a poling period of 300 µm. By cryogenically cooling the crystal to 77 K, up to 0.72 µJ terahertz energy is obtained at a frequency of 0.5 THz with a 3 GHz bandwidth. A maximum internal optical-to-terahertz conversion efficiency of 0.16% is achieved, which is comparable with results achieved using periodically poled lithium niobate crystal. Neither photorefractive effects nor damage was observed with up to 900 mJ/cm, showing the great potential of Rb:PPKTP for multi-millijoule-level MC-THz generation.

Bibliographic Details

Tian, Wenlong; Cirmi, Giovanni; Olgun, Halil T; Mutter, Patrick; Canalias, Carlota; Zukauskas, Andrius; Wang, Lu; Kueny, Elias; Ahr, Frederike; Calendron, Anne-Laure; Reichert, Fabian; Hasse, Kore; Hua, Yi; Schimpf, Damian N; Çankaya, Hüseyin; Pergament, Mikhail; Hemmer, Michael; Matlis, Nicholas; Pasiskevicius, Valdas; Laurell, Fredrik; Kärtner, Franz X

Optica Publishing Group

Physics and Astronomy

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