Patent ID: 9499922
Filing Date: 2016-11-22
CPC Classification: C30B,G02B,H01S

Claim Text:
1. A manufacturing method of a double cladding crystal fiber, comprising the steps of: providing a yttrium aluminum garnet (YAG) or a sapphire single crystal rod; growing said single crystal rod into a single crystal fiber having a predetermined diameter by means of the Laser-Heated Pedestal Growth (LHPG) method; providing a glass capillary for inner cladding, wherein said single crystal fiber is placed into said glass capillary for inner cladding; providing a glass capillary for outer cladding, wherein said single crystal fiber together with said glass capillary for inner cladding are placed into said glass capillary for outer cladding in unison; and heating said glass capillary for inner cladding and said glass capillary for outer cladding simultaneously by means of the LHPG method, in such a way that said glass capillary for inner cladding together with said glass capillary for outer cladding are softened and melted simultaneously to attach to the outside of said single crystal fiber, and thus grown into a double cladding crystal fiber wherein said glass capillary for inner cladding is made of a glass having higher refractive index than one of said glass capillary for outer cladding.