Optical waveguides – With optical coupler – Particular coupling structure
Patent
1991-07-16
1992-08-25
Healy, Brian
Optical waveguides
With optical coupler
Particular coupling structure
385130, 385132, 385122, 359326, 359332, G02B 626, G02B 610, H03F 700
Patent
active
051425963
ABSTRACT:
A tapered light wave guide reduced in propagation loss, improved in coupling efficiency and free from the problem of optical damage. An input section, a widthwise tapered coupling section having a depth d2, and a wave guide having a depth d1 are formed on an LiNbO.sub.3 substrate. A depthwise tapered section in which the depth is changed from d2 to d1 is provided to connect the widthwise tapered coupling section having constant depth d2 and the wave guide, whereby a reduction in light propagation efficiency due to optical damage is prevented.
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Mizuuchi Kiminori
Taniuchi Tetsuo
Yamamoto Kazuhisa
Healy Brian
Matsushita Electric - Industrial Co., Ltd.
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