Mitsubishi Electric Corporation

Yuhi Kono

Takayuki Yanagisawa

Kohei Sakai

Yojiro Watanabe

Takeshi Sakimura

Yukari Takada

Fumio Shoda

There are provided: a planar waveguide in which claddings () and () each having a smaller refractive index than a laser medium for absorbing pump light () are bonded to an upper surface () and a lower surface () of a core () which is formed from the laser medium; pump light generation sources () and () for emitting pump light () to side surfaces () and () of the core (); and laser light high reflection films () and () formed on side surfaces () and () of the core (). Each of side surfaces () and () of the cladding () corresponding to the side surfaces () and () of the core () has a ridge structure () in which a part thereof is recessed.

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Tokyo, Japan

Yuhi Kono