Laser Operation Modes - Sirona SIROLaser Xtend Operating Instructions Manual

Sirona Dental Systems GmbH
Operating Instructions SIROLaser Xtend
6
4
2
0
0 10 000 20 000
Time [µs]
6
4
2
0
0 10 000 20 000
Time [µs]
14
12
10
8
6
4
2
0
0 1 000 2 000
Time [µs]
14
12
10
8
6
4
2
0
0 100
Time [µs]
63 18 351 D3576
D3576.201.01.05.02 11.2018

Laser operation modes

3.3
Continuous wave mode (CW)
CW implies a continuous, uninterrupted laser beam as long as the laser
is activated (and determined by a time set). This means a very good
power control since the maximum power equals the average power.
In adjacent example the laser is in CW mode with a power of 3 W.
30 000
Chopped mode
in literature sometimes also called "pulse mode"
The laser beam is interrupted at regular intervals . With the SIROLaser
Xtend the duty cycle is fixed on 50% (50% ON and 50% OFF). Only
after the upgrade the duty cycle can be adjusted. The average power is
the product of power and duty cycle.
30 000
The result is a better thermal control due to the fact that the OFF
periods are used for thermal relaxation of the tissue.
In adjacent example the laser is in chopped mode with a power of 5 W
and a duty cycle of 50%. The average power is 2.5 W.
Peak-pulse mode
The laser beam is pulsed with a high peak (10 W with the SIROLaser
Xtend, 14 W after the upgrade) for a very short treatment puls (20 µs) at
a very high frequency (20 kHz) to achieve a longer cooling time. So the
duty cycles are reduced.
In adjacent example the laser is in peak-pulse mode with a power of
10 W and a duty cycle of 20%. The average power is 2 W.
NOTE
The average power may not exceed 4 W in peak-pulse mode with the
SIROLaser Xtend. After the upgrade the average power may not
3 000
exceed 6 W.
200 300
3 System description
3.3 Laser operation modes
15