University of Seoul Industry Cooperation Foundation

Junha Jung

Tae Yoon Kim

Ju Han Lee

Kunkyu Kang

The present invention relates to an optical fiber device for removing cladding light, an apparatus and a method for etching the same. The optical fiber device comprises: a first optical fiber section through an Noptical fiber section arranged in sequence along a light travelling direction; and a first tapered coupling section coupling a Koptical fiber section and a (K+1)optical fiber section, where the Koptical fiber section is any one of the first optical fiber section through the Noptical fiber section and the (K+1)optical fiber section is any one of the first optical fiber section through the Noptical fiber section adjacent to the Koptical fiber section, wherein the Koptical fiber section comprises: at least one first subsection and at least one second subsection alternately arranged along the light travelling direction, each of the at least one first subsection having a diameter Dand a length L; and each of the at least one second subsection having a diameter Dand a length L; and a second tapered coupling section coupling the first subsection and the second subsection adjacent to the first subsection, wherein the diameter Dand the length Lof the first subsection and the diameter Dand the length Lof the second subsection of the Koptical fiber section and a diameter Dand a length Lof the first subsection and a diameter Dand a length Lof the second subsection of the (K+1)optical section satisfy D&#x3e;D, D&#x3e;D, L&#x3e;L, L&#x3e;Land D=D, and satisfy D&#x3e;Dfor odd K and D&#x3c;Dfor even K (where N is a natural number, and K is any natural number satisfying 1&#x2264;K&#x2264;N&#x2212;1).

Apparatus and method for etching optical fiber device for removing cladding light

The present invention relates to an optical fiber device for removing cladding light, an apparatus and a method for etching the same. The optical fiber device comprises: a first optical fiber section through an Noptical fiber section arranged in sequence along a light travelling direction; and a first tapered coupling section coupling a Koptical fiber section and a (K+1)optical fiber section, where the Koptical fiber section is any one of the first optical fiber section through the Noptical fiber section and the (K+1)optical fiber section is any one of the first optical fiber section through the Noptical fiber section adjacent to the Koptical fiber section, wherein the Koptical fiber section comprises: at least one first subsection and at least one second subsection alternately arranged along the light travelling direction, each of the at least one first subsection having a diameter Dand a length L; and each of the at least one second subsection having a diameter Dand a length L; and a second tapered coupling section coupling the first subsection and the second subsection adjacent to the first subsection, wherein the diameter Dand the length Lof the first subsection and the diameter Dand the length Lof the second subsection of the Koptical fiber section and a diameter Dand a length Lof the first subsection and a diameter Dand a length Lof the second subsection of the (K+1)optical fiber section satisfy D&#x3e;D, D&#x3e;D, L&#x3e;L, L&#x3e;Land D=D, and satisfy D&#x3e;Dfor odd K and D&#x3c;Dfor even K (where N is a natural number, and K is any natural number satisfying 1&#x2264;K&#x2264;N&#x2212;1).

Growing community of inventors

Seoul, South Korea

Junha Jung