- Quantum Cascade Laser Starter Kit Instructions Manual

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 dura tion (11) to 3.0, corre-
sp onding 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 powe r range of the
laser (specified in the datas hee t), ze roed and
aligned.
[8] Turn the HV power supply O N, then the
TPG128 ON, and slowly incr e ase 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 b oth the ano de 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 las e r 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
sp e c ified in the datasheet or by special agree-
ment with Alpes Lasers.
T
P
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1
2
8
−
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T
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5
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5
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0
0
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−
−
−
−
−
−
−
−
−
P
e
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−
−
−
−
−
−
−
−
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D
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6
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8
9
10
11
Fig.23: Starting the TPG128