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5(9%
from the cladding that surrounds the fiber). For dual wavelength systems, two fiber burns must be
done.
a. Install a test fiber in the 100X fiber examination microscope and examine its surface to confirm that
it is unused.
b. Install the test fiber at the fiber port, then turn on the system and go to service mode.
c. Turn on the flash lamps.
Holmium - Turn on all the flashlamps and set the lamp energy at 50 Joules, lamp volts at 800V
and a pulse rate of 2 Hz.
Ho/Nd:YAG - Two fiber burns must be done.
1) Holmium: Turn on all flashlamps except lamp #2 and set the lamp energy at 50
Joules, lamp volts 800V and a pulse rate of 5 Hz.
2) Nd:YAG: Turn off all flashlamps except Lamp #2, set the lamp current at 75A, pulse
rate at 60 Hz and lamp volts at 800V.
NOTE: The lamp volts is always set at 800V.
d. Fire the laser for approximately one second.
e. Remove the fiber and examine in the microscope. The burn and cladding will be easily visualized if
the other end of the test fiber is pointed towards a light source. The burn should be approximately
centered in the fiber optic and be well away from the contact with the fiber cladding, a shown in the
drawing below. If the system fails its check, perform the YAG Channel Adjustments in Topic 3.5.
NOTE: If the spot size is large, check the individual YAG channels for proper alignment. Spot
size should be less than 260µm in diameter and no closer than 50µm from the cladding.
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