Angle-tuned second-harmonic generation in periodically-poled lithium niobate

作者：Kim B J; Choi H J; Cha M^*

来源：Applied Physics B: Lasers and Optics , 2012, 107(2): 349-353.

DOI：10.1007/s00340-012-4932-x

We investigated angular tuning of quasi-phase-matching (QPM) second-harmonic generation (SHG), in order to extend the tunable range of QPM and to combine the advantages of QPM and birefringence phase-matching. The direction of the input fundamental wave vector was detuned from the QPM grating vector along the crystallographic -axis of a periodically-poled lithium niobate (PPLN) crystal in the - and -planes. A larger tuning range of SHG was obtained for the detuning in the -plane, continuously shifting the QPM peak of the fundamental wavelength from 1524 to 1595 nm by changing the detuning angle from 0A degrees (parallel to -axis as conventional QPM) to 23.2A degrees.

• 出版日期2012-5