Noncritical phase-matching fourth- and fifth-harmonic generation of 1077 nm laser using KDP-family crystals

We systematically demonstrated the angular and temperature acceptances of noncritical phase-matching (NCPM) fourth- and fifth-harmonic generation (FHG and FiHG) of a 1077 nm laser in NH H PO (ADP), KH PO (KDP), and KD PO (DKDP) crystals. In this work, a new, to the best of our knowledge, laser frequ...

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Bibliographic Details
Published in:Optics letters 2022-06, Vol.47 (12), p.2947-2950
Main Authors: Cui, Zijian, Han, Lu, Wang, Chao, Sun, Mingying, Liu, De'an, Zhu, Jianqiang
Format: Article
Language:English
Subjects:
Ammonium dihydrogen phosphate
Crystals
KDP crystals
Lasers
Neodymium lasers
Phase matching
Potassium phosphates
Second harmonic generation
Semiconductor lasers
Ultraviolet lasers
YAG lasers
YLF lasers
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Summary:We systematically demonstrated the angular and temperature acceptances of noncritical phase-matching (NCPM) fourth- and fifth-harmonic generation (FHG and FiHG) of a 1077 nm laser in NH H PO (ADP), KH PO (KDP), and KD PO (DKDP) crystals. In this work, a new, to the best of our knowledge, laser frequency with a wavelength of 1077 nm was generated by optical parametric amplification, in which the pump light (526.3 nm) was generated by the frequency doubling of a Nd:YLF laser (1052.7 nm), and the signal light was a Yb:YAG laser (1029.5 nm). Subsequently, the 1077 nm laser was used as the fundamental wave for FHG and FiHG to obtain a deep-ultraviolet laser source. For ADP and DKDP crystals, NCPM FHG of a 1077 nm laser was realized at 74.0 C and 132.5 C, respectively, and large angular acceptances of 59.8 and 61.6 mrad were measured. For the FiHG, NCPM was realized in a KDP crystal at 48.5 C with an angular acceptance of 56.4 mrad. The results pave the way for high-energy and high-power deep-ultraviolet laser generation using KDP-family crystals under noncryogenic conditions.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.458952