| 摘要 |
A light emitting device includes an active layer; at least a portion of the active layer constitutes a gain region. The gain region is continuous from a first end surface and a second end surface. The gain region includes a first portion extending from the first end surface to a first reflective surface in a direction tilted with respect to a normal to the first side surface as viewed two-dimensionally; a second portion extending from the second end surface to the second reflective surface in a direction tilted with respect to a normal to the first side surface as viewed two-dimensionally; and a third portion extending from the first reflective surface to the second reflective surface in a direction tilted with respect to a normal to the first reflective surface as viewed two-dimensionally.
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