发明名称 |
OPTICAL WAVEGUIDE TYPE OPTICAL MODULATOR AND PRODUCTION METHOD THEREFOR |
摘要 |
There is provided a high performance optical waveguide type optical modulator with excellent long term reliability, in which contamination of the buffer layer in a forming process of a signal field adjustment region on the buffer layer by a lift-off method or an etching method, is prevented and DC drift thus suppressed. The optical waveguide type optical modulator 10 comprises a substrate 11 having an electro-optic effect, optical waveguides 12 formed on the surface of this substrate 11, a traveling-wave type signal electrode 13a and ground electrodes 13b which are provided on the substrate 11 and control a lightwave, and a buffer layer 14 provided between the electrodes 13 and the optical waveguides 12, and furthermore, a dielectric layer 15 is provided on the entire surface of the buffer layer 14 on the side of the electrodes 13, and a signal field adjustment region 16 which has a wider width than that of the traveling-wave type signal electrode 13a and is made of a material with a higher refractive index than that of the dielectric layer 15 is formed between the dielectric layer 15 and the traveling-wave type signal electrode 13a. <IMAGE> |
申请公布号 |
EP1321796(A4) |
申请公布日期 |
2004.04.14 |
申请号 |
EP20010970122 |
申请日期 |
2001.09.18 |
申请人 |
SUMITOMO OSAKA CEMENT CO., LTD. |
发明人 |
NAGATA, HIROTOSHI;MIYAMA, YASUYUKI;YAMAMOTO, FUTOSHI;SHINRIKI, TAKASHI;SHIMIZU, RYOU |
分类号 |
G02F1/03;G02F1/035;G02F1/225 |
主分类号 |
G02F1/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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