Stanford Research Systems LDC500, Руководство по эксплуатации и обслуживанию

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6.1 Cables 6 – 3
male connector. A gender-changer (with two female 9-pin con-
nectors, wired “pin-to-pin”) can be used, but be careful to not
use an RS-232 null modem part. The interlock will require
connecting pins 1 & 2 internally in the mount.
•
Thorlabs: Not compatible. Because of the grounding scheme
used in Thor mounts, the cable must be customized for each
laser configuration. See the discussion for the flying-lead cable.
The flying-lead version (see Figure 6.2) is available in one length
(6 ft), and provides users with the greatest flexibility for interfacing
to a range of laser mounts.
D-sub 9 pin male
to LDC500 / 501 / 502
1,2
3
4
5
6
7
8
9 Interlock
Chassis
LD Vsense –
LD Cathode (–)
PD Cathode (–)
PD Anode (+)
LD
LD Anode (+)
AWG 28
AWG 28
AWG 28
AWG 22
Shielding
6 ft (1.8m)
Brown
Interlock
Interlock
PD Cathode
PD Anode
LD Anode Sense +
LD Anode (+)
LD Cathode (–)
LD Cathode Sense –
Green
White
Black
Blue
Red
Red
Red
1
6
7
8
9
2
3
4
5
Figure 6.2: Laser diode cable with flying leads. SRS part number O500C1.
6.1.1.1 special note for Thorlabs mounts
Laser diode mounts from Thorlabs are switch-configured, based on
the grounding of your specific laser diode and photodiode. These
switches connect each terminal (anode or cathode) between either the
corresponding pin of the mount connector, and the chassis ground
of the mount. The laser diode circuit, and the photodiode circuit,
are each completed through the “Laser Ground Pin” of the mount
(typically pin 3).
For example, consider a laser diode with Grounded Anode, and
photodiode Grounded Cathode. In this case, the black LD Cathode
lead and the green LD Cathode Sense lead are both wired to the LD
Cathode pin (typically pin 7 on Thorlabs mounts), and the white LD
LDC500 Series Laser Diode Controllers