We present the detailed description on the fiber techniques adopted in the BOES: the design concepts and manufacturing of the v grooves, the procedures of the fiber polishing, adhering of the fibers to the v grooves, and the axis alignment of the fiber input and exit. The high efficiency and throughput of the BOES imply that the adopted fiber arts and the other optical components were well designed and properly treated. We learned that the relatively low efficiency of the 80 micron fiber comparing with the 200 and 300 micron fibers comes from the seeing and the guiding effects not from the poor fiber handling.

• 김강민(한국천문연구원) | KANG-MIN KIM (Korea Astronomy Observatory)
• 장비호(한국천문연구원) | BEE-HO JANG (Korea Astronomy Observatory)
• G. Galazutdinov(한국천문연구원)
• 윤태석(경북대 천문대기과학과) | TAE SEOG YOON (Department of Astronomy and Atmospheric Sciences, Kyungpook National University)