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04/23 / V02 / MaH-IF / manuals/picolas/bfps-vrhsp-02-highspeed-seed-driver-manual
How to get started
The basic settings (temperature, LD current etc.) can be adjusted using the
RS-232 or the PLB-21. You need an additional pulse generator which has to
be connected to the Input MMCX-Terminal. There is no pulse generator
on board of the seed driver!
The PCB is very thin. Mechanical force has to be avoided to prevent
damage. Mechanical damages are not covered by warranty.
Assemble the driver onto an appropriate heat
sink.
Solder a dummy diode between pin no. 10
and pin no. 11. Alternatively make a short
circuit there.
Refer to section “Test Load”. The
connection must be as short as
Connect GND, +5 V TEC and +5 V LD on
power connector (power supply disabled).
Required current for this step is
around 1.2 A per channel.
Connect PLB-21 via D SUB9 to Micro MaTch
cable or PC interface.
Refer to cable drawings.
Connect AWG or pulse generator on input
terminal (no pulse before power supply
Refer to all sections referencing
input (connector #2).
If a PLB-21 is used, communication must be
possible.
Check the +5 V TEC supply for this
step.
Connect the oscilloscope to the driver
(connector #1)
Check if the LD power output is activated in
the settings for the BFPS –VRHSP 02
Enable the power source for +5 V LD.
Set via PLB-21 / hyper terminal program
pulse width = 10 ns (swidth 10000).
Set via hyper terminal program output current
= 50 %, respectively 1 A (scurrent 50).
Feed a triggering signal on the input terminal.
For example 3.3V (50 Ohm termination), 100
ns pulse width and 300 µs repetition rate.
Set output current to an allowable value.
Please consider limiting values of
intended/used laser diode.
Set oscilloscope to a 50 Ohm
termination.
Either by PLB-21 under setpoint 2
(auto) or check with glstat by with
the terminal program (return: “17”)
Make sure not to overload the laser
diode or the driver.
On Imon-Output (current monitor)
you can measure an inverted signal
comparable with the input signal.
Scaling of the I-Mon output is -
14 A/V. An output current of 1 A
conducts an output voltage of 71
Disable the input signal and turn the power
sources for +5 V LD and +5 V TEC off. Take
out the test diode or bypass. Assemble the
Turn the power supply for the +5 V TEC on.
If you are using a laser diode with TEC you
can set temperature settings on PLB-21.
Use the menu TEC SetpointTEC
stp.
Apply the triggering signal.
Make sure not to overload the laser
diode!
Laser
Diodes
Germany and Other Countries
Laser Components Germany GmbH
Tel: +49 8142 2864–0
Fax: +49 8142 2864–11
www.lasercomponents.com
France
Laser Components S.A.S.
Tel: +33 1 39 59 52 25
Fax: +33 1 39 59 53 50
www.lasercomponents.fr
United Kingdom
Laser Components (UK) Ltd.
Tel: +44 1245 491 499
Fax: +44 1245 491 801
www.lasercomponents.co.uk
Nordic Countries
Laser Components Nordic AB
Tel: +46 31 703 71 73
Fax: +46 31 703 71 01
www.lasercomponents.se
