发明名称 |
VARIABLE WAVELENGTH OPTICAL FILTER |
摘要 |
A wavelength tunable optical filter (1) comprises a dielectric crystal portion (2) comprised of a dielectric crystal having a cubic system and exhibiting a quadratic electro-optic effect, a mirror portion (5, 6) constituting a Fabry-Perot etalon in cooperation with said dielectric crystal portion, and an electrode (3, 4) configured to apply a voltage to said dielectric crystal portion thereby to change a wavelength of light transmitting through said etalon on a basis of said electro-optic effect. According to the configuration, since the dielectric crystal having a cubic system and exhibiting a quadratic electro-optic effect is used, there is provided a wavelength tunable optical filter that is capable of operating at high-speed on application of a low voltage.
|
申请公布号 |
EP1659445(A1) |
申请公布日期 |
2006.05.24 |
申请号 |
EP20040746080 |
申请日期 |
2004.06.11 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
SHIMOKOZONO, MAKOTO;FUJIURA, KAZUO;TOYODA, SEIJI;IMAI, TADAYUKI |
分类号 |
G02B5/28;G02F1/21;(IPC1-7):G02F1/35 |
主分类号 |
G02B5/28 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|