Abstract
The second-order susceptibility d
36 of ammonium
dihydrogen phosphate (ADP) was determined from phase-matched second-harmonic
generation (SHG) at two wavelengths. A cw single-mode He–Ne laser
(λ = 633 nm) and a cw single-mode Nd:YAG laser (λ
= 1064 nm) were used as fundamental beam sources. The results were
d
36(ADP, 633 nm) = (1.31 ± 0.05)
× 10−9 esu = 0.55 ± 0.02 pm/V and
d
36(ADP, 1064 nm) = (1.10 ±
0.06) × 10−9 esu = 0.46 ± 0.03 pm/V.
The d
11 values of α-quartz were determined
relative to d
36(ADP) to be
d
11(α-quartz, 633 nm) = (7.4
± 0.3) × 10−10 esu = 0.31 ±
0.01 pm/V and d
11(α-quartz, 1064 nm)
= (7.1 ± 0.3) × 10−10 esu =
0.30 ± 0.01 pm/V by the use of the Maker fringe method. The
Miller’s delta of ADP and α-quartz is in good agreement at the
two wavelengths.
© 1995 Optical Society of America
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