THORLABS GSL Series User Manual page 10

GSL Series Gain-Switched Lasers
Trigger Port
The Trigger In/Out port has dual function. If the internal oscillators are used, then the Trigger port provides an
output signal that is synchronized with the pulse generation. Both a Hi-Z and 50 Ω user-trigger mode are available
for low-frequency and high-frequency operation respectively. In the user-triggered mode, the SMA port allows
external trigger signals to drive the pulse generator. See the Specifications table in 5.2 for the correct signal levels
and impedances. Allowable repetition rate ranges for each pulse duration are given in the table below.
Pulse Width Position
1 – MIN
2
3
4
5
6
7
8
9
10
11
12
13
14
15 – MAX
16 – CW
Status LED
The operational state of the GSL series of lasers is indicated through the multicolor (Red/Green/Amber) "STATUS"
LED on the back panel of the laser. Following typical thermal stabilization and laser emission delay, this LED should
be OFF (-). A full list of the states is summarized in the following table.
Laser State
Laser Emission
Error
Interlock OPEN
Rep. Rate Out of Range
Laser Powering On
a
Refer to Section 5.1Chapter 5 for specific values.
b
See Troubleshooting section 7.2 for instructions if an error occurs.
Page 8
Pulse Width Max Rep. Rate
a
<100 ps 200 MHz
2 ns 200 MHz
4 ns 100 MHz
6 ns 30 MHz
8 ns 30 MHz
10 ns 30 MHz
12 ns 30 MHz
14 ns 30 MHz
16 ns 30 MHz
18 ns 25 MHz
20 ns 20 MHz
25 ns 16 MHz
30 ns 13 MHz
40 ns 10 MHz
65 ns 5 MHz
CW N/A
Status LED State
Red
-
b
Blinking
On
-
- Slow Blinking
Min Rep. Rate
200 kHz
200 kHz
200 kHz
Single Shot
Single Shot
Single Shot
Single Shot
Single Shot
Single Shot
Single Shot
Single Shot
Single Shot
Single Shot
Single Shot
Single Shot
N/A
Green Amber
- -
- -
- -
- Slow Blinking
-
Chapter 4: Operation
TTN311232-D02