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Chapter 6
Use
6.1 Chapter overview
This chapter describes how to use the QCL Starter
Kit. It also explains the functionalities of the TPG12 8
and the Temperature Controller (TCU151).
6.2 QCL pulse timing unit com-
mand description
The Quantum Casc ade L aser is controlled by the
QCL pulse timing unit TPG128. The TPG128 front
panel is compos e d of the following items:
(1) Power ON/OFF switch.
(2) Period fine 10 turns potentiometer.
(3) Period range 3 positions switch.
(4) Pulse duration 10 turns potentiometer.
(5) BNC 50Ω TTL pulse 2 output.
(6) BNC 50Ω TTL pulse 1 output.
(7) BNC 50Ω TTL Trig OUT.
(8) BNC TTL Gate IN.
(9) LEMO 00 12VDC output (for LDD100).
T
P
G
1
2
8
−
T
T
L
P
u
l
se
G
e
n
e
r
a
t
o
r
O
F
F
O
N
P
o
w
e
r
0
.
2
t
o
2
.
2
µ
s
0
.
5
t
o
1
0
.
5
µ
s
5
t
o
1
0
5
µ
s
0
t
o
2
0
0
n
s
−
−
−
−
−
−
−
−
−
P
e
r
i
o
d
−
−
−
−
−
−
−
−
−
−
D
u
r
a
t
i
o
G
a
t
e
I
N
T
r
i
g
O
U
T
O
u
t
1
O
u
t
2
5
0
o
h
m
s
5
0
o
h
m
s
5
0
o
h
m
s
m
a
x
6
0
m
A
+
1
2
V
0
V
6
1
2
3
9
8
7
5
4
Fig.18: TPG128 front panel
30