Non-critical phase-matched second harmonic generation by βapos;-Gd2(MoO4)3 in the near infrared
Kendall, K.A.; Kurtz, S.K.; Lane, R.; Bosenberg, W.R.; Tang, C.L.; Grimouille, G.; Oudar, J.L.; Neurgaonkar, R.R.
Applications of Ferroelectrics, 1990., IEEE 7th International Symposium on
Volume , Issue , 6-8 Jun 1990 Page(s):108 - 111
Digital Object Identifier 10.1109/ISAF.1990.200205
Summary:A two-crystal walkoff-compensated β-barium metaborate optical
parametric oscillator was used to locate the noncritical (90°)
phase-matching (NCPM) wavelengths for type II second-harmonic generation
along the crystallographic a- and b-axes of a crystal
of β'-gadolinium molybdate and to measure their spectral and
angular acceptances. The relative second-harmonic intensity versus
wavelength curves exhibited peaks at 1.403 μm and 1.410 μm,
respectively, with full widths at half maximum of 7.2 nm and 7.3 nm. The
relative second-harmonic intensity versus external angular orientation
curves had full widths at half maximum for propagation along the a
- and b-axes of 13.6° and 14.1° θext
and 71.5° and ~92.3° φext, respectively.
These large spectral and angular acceptances are typical of noncritical
phase-matching. The discrepancy between calculated and experimental NCPM
wavelengths is attributed to the errors inherent in measuring and
extrapolating refractive indices
View citation and abstract |
Cart
