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HA0164T Rev F Feb 2018
Chapter 3
3.3 Electrical Installation
3.3.1 Connecting a Laser Devicer
Fig. 3.2 Rear Panel Connections
INTERLOCK
– The interlock must be fitted before the laser output can be enabled.
The INTERLOCK LED on the GUI panel is lit green when the ‘Interlock’ jack plug is
fitted, red when open circuit - see Section 6.1.
LASER OUT
(FC connector) – Provides connection of the output fiber.
EXT IN
(SMA connector) – Used to control the intensity of the laser output from an
external source. This input can be driven from a 0 to 10V voltage source. The input
impedence is 13k
Ω
.
3.3.2 Using the Safety Interlock and Key Switch
The TLS001 T-Cube Laser Source is a class 1 (1550 nm) / class 3R (635 nm) laser
device and therefore is not required to have a safety interlock and/or key switch.
However, a functional interlock (see Fig. 3.2) and key switch (see Fig. 4.1) is provided
on these products. The key switch must be turned on, and a short circuit must be
applied across the terminals of the interlock before the unit can be enabled.
An INTERLOCK jack plug (3.5mm stereo phono jack plug) is supplied with the unit to
close this connection. Alternatively, the contact can be controlled externally; the user
can use a custom 3.5mm jackplug connected to a remote actuated (normally open)
switch (e.g. an open door indicator), which must be closed before the unit can
operate.
Note
Thorlabs supply a variety of SMA to BNC and SMC to BNC adaptor and extension
cables. Please see our catalog, or visit www.Thorlabs.com for further details.
Note
When open circuit, the INTERLOCK jack centre pin is at about +3.7V.
When shorted, the current is typically 1mA.
EXT IN
INTERLOCK
LASER APERTURE
