US 12,007,606 B2
Ring resonator and manufacturing method thereof
Kyoungsik Yu, Daejeon (KR); Gyeongho Son, Daejeon (KR); and Mohamad Syahadi, Daejeon (KR)
Assigned to Korea Advanced Institute of Science and Technology, Daejeon (KR)
Filed by Korea Advanced Institute of Science and Technology, Daejeon (KR)
Filed on Feb. 10, 2021, as Appl. No. 17/172,416.
Claims priority of application No. 10-2019-0165431 (KR), filed on Dec. 12, 2019; and application No. 10-2020-0174901 (KR), filed on Dec. 14, 2020.
Prior Publication US 2021/0239907 A1, Aug. 5, 2021
Int. Cl. G02B 6/293 (2006.01); G02B 6/10 (2006.01); G02B 6/245 (2006.01); G02B 6/255 (2006.01); H01P 7/08 (2006.01); H01S 3/106 (2006.01)
CPC G02B 6/2934 (2013.01) [G02B 6/10 (2013.01); G02B 6/245 (2013.01); G02B 6/255 (2013.01); H01P 7/082 (2013.01); H01S 3/1062 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A ring resonator, comprising:
a core having two ends, wherein both ends of the core in a lengthwise direction are connected to have a circular shape;
a cladding surrounding the core;
a jacket surrounding the cladding;
two sleeves, wherein each of the two sleeves surrounds a portion of the jacket; and
a shrinking sleeve that is arranged to surround a portion where both ends of the core are connected to each other;
wherein a portion of the core is exposed from the cladding and the jacket;
wherein the shrinking sleeve is fitted to the jacket; and
wherein the two sleeves are arranged at positions, respectively, which are symmetrical about the center of the ring resonator.
 
2. A method of manufacturing a ring resonator, comprising:
removing portions of a jacket which are arranged on both ends and a central portion of an optical fiber, wherein the optical fiber includes a core having a predetermined length, a cladding surrounding the core, and the jacket surrounding the cladding;
inserting two sleeves, each of which surrounds a remaining portion of the jacket;
connecting both ends of the optical fiber;
providing a shrinking sleeve to surround a portion where both ends of the optical fiber are connected; and
etching the cladding arranged in the central portion of the optical fiber from which the portion of the jacket is removed;
wherein the shrinking sleeve is fitted to the jacket; and
wherein the two sleeves are arranged at positions, respectively, which are symmetrical about the center of the ring resonator.