Capillary electrophoresis device

A capillary cartridge comprising a capillary, a first irradiation fiber, and a first detection fiber, wherein

• the first irradiation fiber and the first detection fiber are fixed such that optical axes of the first irradiation fiber and the first detection fiber intersect each other in a lumen of the capillary, and
• the capillary cartridge is attached to an electrophoresis device including a light source, a second irradiation fiber configured to guide light from the light source, a detector configured to detect light, and a second detection fiber configured to guide light to the detector by connecting the first irradiation fiber and the second irradiation fiber, and connecting the first detection fiber and the second detection fiber.

(canceled)

A fixing substrate manufacturing method for manufacturing a fixing substrate, in a capillary cartridge connected to an electrophoresis device including a light source, the first irradiation fiber configured to guide light from the light source, a detector configured to detect light, and the first detection fiber configured to guide light to the detector, the fixing substrate being for fixing a capillary, a second irradiation fiber connected to a first irradiation fiber, and a second detection fiber connected to a first detection fiber, the method comprising

• forming, on a front surface of the fixing substrate, a groove for fixing the capillary and a groove for fixing the second irradiation fiber, forming, on a back surface, a groove orthogonal to the groove for fixing the capillary, and forming a through hole for fixing the second detection fiber by crossing the groove for fixing the capillary and the orthogonal groove to each other.