User’s Manual
Published on February 2017 UMn°154 – rev.05 11
This document and any information disclosed herein are the property of Keopsys and constitutes and contains proprietary information.
Receipt or possession of this document does not confer or transfer any right to duplicate, use disclose any information
2.4. Maintenance operation
If the replacement of the input fuse is required, use a fuse which comply with the characteristics given
on the table §2.2.1. In order to avoid injury, this operation shall follow the following steps:
1. Turn Off the device.
2. Disconnect the device from power supply by the disconnection of its input power cord.
3. Remove the fuse holder from the input power socket.
4. Replace the fuse.
5. Plug back the fuse holder on the input power socket.
6. And use the “First time power up” procedure listed below to power up the device.
2.5. Power Up
2.5.1. First time power-up
To power up the device, you should follow those steps (see §3.1 for device elements location, and §7
for IHM description):
1. Check the device is powered off and your seed laser too.
2. Plug the device to a properly certified and grounded power supply using the power cord
provided by Keopsys.
3. The amplifier is equipped with a safety interlock. When the interlock circuit is opened (interlock
connector removed), the On/Off key on the front panel is disabled. Use the interlock according
to your local regulations.
4. Check and clean your seed laser output pigtail and the amplifier input pigtail. Make sure that
the connector surface is carefully cleaned. Do not operate the laser or amplifier with a damaged
connector.
5. Connect both pigtails.
6. Connect the output pigtail to a power meter or bolometer device which can support laser
nominal power (see device test report). Beware of the cleaning of the optical connector
(see §3.1). Make sure that the connector surface is carefully cleaned. Do not operate the laser
with a damaged connector.
7. Switch on Line button. Before switching ON the Line button, Key must be on the OFF position.
The display shows a welcome message with the laser model and its serial number. The CPU
initializes. This will take a few seconds.
8. Turn on your seed laser and set its output power to the nominal amplifier input power (see test
report). Attention you may have some power on amplifier output.
9. It’s recommended to first check the output power at nominal current. Select ACC mode (see
§3.1) and set the pump current readings at nominal values (see device test report).
10. Use the Display / Enter / Exit / Knob interface to set the laser current to 0A.
11. Turn the Key On.
12. Press the pump button. A blue LED lit when pump laser diodes are ON. Attention the amplifier
now emits power.
13. Increase slowly the diode current. The laser output power will increase slowly. Output power
measured in these conditions at the end of the starting sequence should correspond to the
output saturated power of the device indicated in device test report.
14. Let the device running the warm up duration before use (see test report for exact value).
15. The amplifier emission can be switched OFF with pump button. Remember that the CPU will
keep in memory the last setting.
2.5.2. Shut down
To shut down the device, you should follow those steps:
1. Stop amplification using pump button.
2. Turn Off the key.
3. Turn Off the seed laser
4. Turn Off the device.
5. Unplug de device from power supply.
6. Protect optical connectors.
To Next Page