광 결합기는 기판, 기판 상의 버퍼층, 버퍼층 상에 배치되고, 광섬유가 연결되는 제 1 측면 및 제 1 측면에 대향하는 제 2 측면을 갖는 리지도파로, 및 버퍼층 상에서, 제 2 측면에 인접하게 배치되는 제 1 도파로를 포함하되, 제 1 도파로는 몸체부, 몸체부의 일단으로부터 연장되어 리지도파로에 삽입되는 제 1 연결부를 포함하고, 제 1 연결부의 폭은 제 2 측면으로부터 멀어질수록 감소하고, 리지도파로는 버퍼층의 상면 아래로 연장되는 연장부를 포함한다.
KSP Keywords
optical coupler
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