Optical attenuator and optical attenuator module

Details Optical attenuator and optical attenuator module Optical attenuator and optical attenuator module

G - Physics

02

B

G02B 5/00 (2006.01) G02B 6/26 (2006.01)

Patent

CA 2364545

An optical attenuator (8) has a substrate (glass substrate) (1) and an optical attenuation film (2) that attenuates an input light with a predetermined optical attenuation factor, and the optical attenuation film (2) is disposed on a light input face (3) of the substrate (1). An angle defined by the light input face (3) and the light output face (4) of the substrate (1) is set to 0.15° to 0.5°. A protective film (5) for preventing the deterioration of the optical attenuation film (2) is foamed on a surface of the optical attenuation film (2).

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