Open AccessUltra-broadband optical parametric generation and simultaneous RGB generation in periodically poled lithium niobate
Author(s) -
Hwan Hong Lim,
Om Prakash,
ByeongJoo Kim,
Krishnamoorthy Pandiyan,
Myoungsik Cha,
Bum Ku Rhee
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.018294
Subject(s) - lithium niobate , optics , materials science , second harmonic generation , sum frequency generation , signal beam , femtosecond , nonlinear optics , wavelength , energy conversion efficiency , laser , broadband , optoelectronics , beam (structure) , physics
We report on efficient collinear optical parametric generation (OPG) with gain band ranging from 1400 to 2600 nm in a 2 cm-long periodically poled lithium niobate (PPLN) crystal. Such an ultra-broad gain band was obtained by choosing the pump wavelength at 933 nm, at which the group-velocities of the signal and the idler match near the degeneracy point. High OPG efficiency was obtained by quasi-phase matching (QPM). The ultra-broadband OPG led to efficient collinear RGB generation from a single PPLN crystal at a fixed pump wavelength. The green and red beams were found to be originating from high-order QPM sum-frequency generation between the pump and selected frequencies in the OPG band, while the blue beam was high-order QPM second-harmonic generation of the pump.