The Furukawa Electric Co., Ltd.

Takuma Aoki

Hiroshi Matsuura

Kouki Sato

Nobuyuki Shibata

Toshimitsu Nishiwaki

Mizuki Oike

An optical attenuator ( ) has a substrate (glass substrate) ( ) and an optical attenuation film ( ) that attenuates an input light with a predetermined optical attenuation factor, and the optical attenuation film ( ) is disposed on a light input face ( ) of the substrate ( ). An angle defined by the light input face ( ) and the light output face ( ) of the substrate ( ) is set to 0.15&deg; to 0.5&deg;. A protective film ( ) for preventing the deterioration of the optical attenuation film ( ) is formed on a surface of the optical attenuation film ( ).

Optical attenuator and optical attenuator module

An optical module according to the present invention has a package, an optical element, and a mounting stage interposed between the optical element and the package. The surface of the mounting stage to which the optical element is bonded is smoother than the bottom surface of the package to which the mounting stage is fixed.

Growing community of inventors

Tokyo, Japan

Takuma Aoki