Coherent light generators – Particular beam control device – Nonlinear device
Patent
1993-03-10
1994-04-12
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Nonlinear device
372 21, 372 7, 372106, 359328, 385122, H01S 310
Patent
active
053032470
ABSTRACT:
An optical harmonic generating device is provided with reverse polarization layers which are made of non-linear optical crystal polarized in a lower direction and are periodically arranged at regular intervals, a non-reverse polarization layer which is made of the non-linear optical crystal polarized in the upper direction and is arrange to surround the reverse polarization layers, a wave guide penetrating through alternate rows of the reverse and non-reverse polarization layers, a first electrode arranged on the wave guide, and second electrodes arranged on both ends of the alternate rows. Electric field is induced between the first and second electrodes through the wave guide to change a refractive index of the reverse and non-reverse polarization layers. A part of the fundamental wave passes through the alternate rows to be converted to the harmonic wave, and another part of the fundamental wave passes through the non-reverse polarization layer positioned under the reverse polarization layers to change the refractive index for the fundamental wave.
REFERENCES:
patent: 5036220 (1991-07-01), Byer et al.
patent: 5052770 (1991-10-01), Papuchon
patent: 5121250 (1992-06-01), Shinozaki et al.
patent: 5185752 (1993-02-01), Welch et al.
"Blue light generation by frequency doubling in periodically poled lithium niobate channel waveguide" by E. J. Lim et al; Electronics Letters, vol. 25, No. 11; May 25, 1989; pp. 731-732.
"Milliwatt-order blue-light generation in a periodically domain-inverted LiTaO.sub.3 waveguide" by K. Yamamoto et al; Optics Letters, vol. 16, No. 15; Aug. 1, 1991; pp. 1156-1158.
Mizuuchi Kiminori
Yamamoto Kazuhisa
Jr. Leon Scott
Matsushita Electric - Industrial Co., Ltd.
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