Quantum Instruments Cascade Laser Starter Kit User Manual
Page 34
Starter Kit Instruction Manual
Use
33
[5] Turn the TPG128 ON (8) and set the pulse
period to 2.0 and the range to 0.5 to 10.5 µs
(medium), corresponding to a period length
of about 2.5us, or to the values specified on
the datasheet or by Alpes Lasers.
[6] Set the pulse duration (11) to 3.0, corre-
sponding to a pulse length of about 50ns, or
to the values specified on the datasheet or by
Alpes Lasers.
[7] Verify laser cabling, power meter range
set corresponding to the power range of the
laser (specified in the datasheet), zeroed and
aligned.
[8] Turn the HV power supply ON, then the
TPG128 ON, and slowly increase the HV out-
put voltage (but not higher than specified in
the datasheet of the laser!)
[9] If available, monitor the averaged output
to avoid overloading the laser. In any case
place one probe on both the anode and the
cathode of the laser and view it with an oscil-
loscope.
[10] Subtract the two traces and you get the
voltage across the laser that should not be
more than the specified max voltage.
Note: The laboratory housing LLH100 makes
available two outputs giving access to these
voltages (see documentation).
[11] Set the desired pulse and period length as
specified in the datasheet or by special agree-
ment with Alpes Lasers.
TPG
128
−TT
L P
ulse
Gen
erato
r
OF
F
ON
Pow
er
0.2
to 2
.2
m
s
0.5
to 1
0.5
m
s
5 to
105
m
s
0 to
200
ns
−−−
− −
−−−
−Pe
riod
−−−
−−−
−−−
−D
ura
tio
Gat
e IN
Trig
OU
T
Ou
t 1
Ou
t 2
50
ohm
s
50
ohm
s
50
ohm
s
ma
x 6
0m
A
+12
V
0 V
8
9
10
11
Fig.23: Starting the TPG128