摘要 |
<p>In a digital thermo-optic switch and an optical ADM filter (21, 31, 40, 74) of the present invention, functional components such as a splitter (11, 12, 13) and a grating structure part (41, 51, 71) formed in the course of an optical circuit (43, 60, 73) as a component are composed of silicone materials which are superior in heat resistance, reduced loss, and low birefringence, thereby achieving sufficiently practical thermal stability, low loss at 1.55 to 1.58 mu m band, wavelength selectivity, and cost reduction. <IMAGE></p> |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
OOBA, NAOKI;WATANABE, TOSHIO;KURIHARA, TAKASHI;IMAMURA, SABURO;HAYASHIDA, SHOICHI;TAMAMURA, TOSHIAKI;ISHII, TETSUYOSHI;INOUE, YASUYUKI;TOYODA, SEIJI |