Kuraray Fibre Tests

Detector Setup

1. The fibre is cut and polished on both ends with the Fiber Fin polisher (the label must be removed due to it's placement too close to the end)
2. The far end of the fibre is painted black with an enamel paint (used for painting scale models).
3. The fibre is placed in a 4m long groove in a black poly-ethylene bar ("puck plastic")
4. The unpainted end is inserted into and held in place by a [ http://www.oceanoptics.com/products/fiberkits.asp#adapter bare-fibre SMA-connector] from Ocean Optics.
5. A UV LED (380nm) is used to illuminate the fibre from above
6. The spectra are obtained using an Ocean Optics photo-spectrometer

Fibre Spectra

Typical fibre spectra at 10,100 and 300 cm.The green data points are the raw spectra as seen by the photo-spectrometer. The light blue points are scaled by an approximation to the quantum efficiency of a Bi-Alkali photocathode.

Bi-Alkili Quantum efficiency approximation

$I_{{scaled}}=I\times 0.25exp{\left({\frac {1}{2}}{\frac {(\lambda -400nm)^{{2}}}{(80nm)^{{2}}}}\right)}$