Fujikura Limited

Ryo Sugimoto

Kuniharu Himeno

Tetsuya Sakai

Takuya Aizawa

Yasuko Kobayashi

An amplification optical fiber with an optical component capable of efficiently absorbing pumping light and a fiber laser device including the same are provided. An amplification optical fiber with an optical component in a fiber laser deviceincludes: an amplification optical fiberhaving a coredoped with an active element and a cladthrough which pumping light for amplifying light to be amplified propagating through the corepropagates; and an optical componentincluding at least one optical fibertohaving a first end coupled to a portion of the cladand a second end coupled to at least another portion of the cladat one endof the amplification optical fiber

Amplification optical fiber with optical component and fiber laser device including the same

A method for detecting a connector disengagement of an optical fiber amplifier and a transmission optical fiber connected thereto, the optical fiber amplifier including a doped optical fiber and a pumping light source, and a transmission optical fiber including at least one connecting portion connected to an output of the optical fiber amplifier, includes the steps of: measuring a reflection from the transmission optical fiber to the optical fiber amplifier; and comparing the reflection to an allowable range between a first threshold that is greater than a predetermined reflection in the absence of a connector disengagement, and a second threshold that is smaller than the predetermined reflection in the absence of a connector disengagement; determining that there is no connector disengagement when the measured reflection is within the allowable range; and determining that there is a connector disengagement otherwise.

Method for detecting disengagement of an optical fiber, an optical fiber amplifier, and a unit of an optical fiber amplifier with a transmission optical fiber

Growing community of inventors

Sakura, Japan

Ryo Sugimoto