OPTICAL COMBINER

• Main Authors: NAKAHARA MOTOHIRO, ARISHIMA KOICHI
• Format: Patent
• Language: English; Japanese
• Published: 12.11.2020
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

To provide an optical combiner that causes light largely different in a wavelength to be coupled.SOLUTION: The present disclosure relates to an optical combiner 11 that uses a gradient index lens emitting light incident upon an incidence end surface 11A from an emission end surface 11B. In the incidence end surface 11A of the gradient index lens, partial regions 11A_101, 11A_102 and 11A_103 are provided that differ in distances z101, z102 and z103 from the emission end surface 11B of the gradient index lens. For each of the partial regions 11A_101, 11A_102 and 11A_103, a wavelength is predetermined that is condensed to an optical axis 12 of the emission end surface 11B.SELECTED DRAWING: Figure 4 【課題】本開示は、波長の大きく異なる光を結合させる光コンバイナを提供することを目的とする。【解決手段】本開示は、入射端面１１Ａに入射された光を出射端面１１Ｂから出射する、屈折率分布型レンズを用いた光コンバイナ１１であって、屈折率分布型レンズの入射端面１１Ａに、屈折率分布型レンズの出射端面１１Ｂからの距離ｚ１０１，ｚ１０２，ｚ１０３が異なる部分領域１１Ａ＿１０１，１１Ａ＿１０２，１１Ａ＿１０３を備え、部分領域１１Ａ＿１０１，１１Ａ＿１０２，１１Ａ＿１０３ごとに、出射端面１１Ｂの光軸１２に集光する波長が予め定められている。【選択図】図４