BUTT-MAN is designed to allow two bare fibers to be coupled quickly and easily without the need for splicing in applications such as OTDR testing. Typical losses are 0.8 dB (0.3 dB best).
Each fiber is initially gripped in the outer thumb-loaded clamps. The left hand clamp moves smoothly along the X-axis moving the fiber along the V-groove into contact with the fixed fiber. This movement can be clamped if required. Index matching gel can be used in the V-groove to improve the coupling efficiency. Once aligned, the two central V-block fiber clamps can be used to hold the fiber ends firmly in the V-groove while a measurement is made.
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