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AssigneesNGK Insulators, Ltd., Pioneer Electronic Corporation
InventorsTakashi Yoshino, Katsuhiro Imai, Minoru Imaeda, Kiyofumi Chikuma, Atsushi Onoe, Ayako Yoshida
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A second harmonic wave-generating element for generating a second harmonic wave from a fundamental wave, having an optical waveguide layer made of first epitaxial material having a fundamental composition of K3Li2−x(Nb1−YTaY)5+XO15+Z, an underclad part made of second epitaxial material having a fundamental composition of K3Li2−X+A(Nb1−Y−BTaY+B)5+X−AO15+Z, an overclad part made of third epitaxial material having a fundamental composition of K3Li2−X+C(Nb1−Y−DTaY+D)5+X−CO15+Z and formed on and contacting the optical waveguide layer, wherein X=0.006 to 0.5, Y=0.00 to 0.05, A=0.006 to 0.12, B=0.005 to 0.5, C=0.006 to 0.12, D=0.005 to 0.5, X−A≦0, X−C≧0, |A−C|≦0.006, and |B−D|≦0.005).
A second harmonic wave-generating element for generating a second harmonic wave from a fundamental wave, comprising an optical waveguide layer made of first epitaxial material having a fundamental composition of K3Li2−X(Nb1−YTaY)5+XO15+Z, an underclad part made of second epitaxial material having a fundamental composition of K3Li2−X+A(Nb−Y−BTaY+B)5+X−AO15+Z, an overclad part made of third epitaxial material having a fundamental composition of K3Li2−X+C(Nb1−Y−DTaY+D)5+X−CO15+Z and formed on and contacting the optical waveguide layer, wherein X=0.006 to 0.5, Y=0.00 to 0.05, A=0.006 to 0.12, B=0.005 to 0.5, C=0.006 to 0.12, D=0.005 to 0.5, X−A≧0, X−C≧0, |A−C|≦0.006, and |B−D|≦0.005).
Dependencies are inferred from the claim text.