Fujitsu Corporation

Kiyoshi Terai

Tatsuro Kunikane

Hideki Isono

Keiji Tanaka

Hironao Hakogi

Hideki Noda

Michihiro Takamatsu

Takashi Yokota

Shinya Okuda

Kazushi Asanuma

Kazuo Yakuwa

Takashi Ishikawa

Satoshi Kusaka

Polarizing separating device and optical isolator employing the same

Optical fiber switching with spherical lens and method of making same

An optical branching filter branches or mixes lights of n-kind of wavelengths. An input/output port for the light mixed n-kind of wavelengths is provided to one of two surfaces of the transparent block and second input/output parts for forming optical filters allowing only the lights having the predetermined wavelengths to pass therethrough, respectively among the lights in n-kind of wavelengths, but reflecting the lights having other wavelengths, respectively is provided to any one of two surfaces. A first input/output port and n second input/output ports, respectively is formed by an optical waveguide and a lens which optically connects the optical waveguide and first input/output part or a second input/output part. Positions of each second input/output port are selected so that the length of optical paths formed between the lenses of the first input/output port in the second input/output port are in the reverse proportion to the lengths of wavelengths corresponding to the second input/output portions.

Optical branching filter

An optical switching means including an optical fiber moving means which is moved by an electromagnetic force, a spring body which has a guide hole through which an optical fiber passes and at least one magnetic body. The magnetic body is fixed on one of its ends and one end is arranged so as to be almost parallel with the moving optical fiber. The moving optical fiber is connected with a fixed optical fiber by moving the magnetic body with an electromagnetic force, thereby effecting optical switching with low attenuation and high accuracy.

Optical switching device

Growing community of inventors

Tokyo, Japan

Kiyoshi Terai