Group-velocity-matched cascaded quadratic nonlinearities of femtosecond pulses in periodically poled MgO:LiNbO3.
Large nonlinear phase shifts were generated with femtosecond pulses at 1560 nm through cascaded quadratic interactions in periodically poled MgO-doped LiNbO3. The off-diagonal component of the nonlinear coefficient was utilized for simultaneous quasi phase matching and group-velocity matching. The effective nonlinear refractive index was varied from -2.9 x 10(-14) to +3.3 x 10(-14) cm2/W by tuning the phase-mismatch conditions.
Ashihara
Satoshi
S
Institute of Industrial Science, University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan. ashihara@iis.u-tokyo.ac.jp
Shimura
Tsutomu
T
Kuroda
Kazuo
K
Yu
Nan Ei
NE
Kurimura
Sunao
S
Kitamura
Kenji
K
Ro
Jung Hoon
JH
Cha
Myoungsik
M
Taira
Takunori
T