THORLABS CLD101 Series, Руководство по эксплуатации

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© 2018 Thorlabs
2 Operation
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2.5.10 System Settings
Use the arrow buttons to select a
parameter, then push EDIT button, or
push the selected topic a second time.
·
Display Brightness can be set
between 20% and 100%
·
Auto Dimming : When enabled,
after 30 sec the display ceases and
reactivates with a touch to the panel.
·
Audible feedback : A click sound
confirming touch panel operation.
·
Beeper Volume : Volume of the alert sound.
·
Temperature Unit : The temperature can be displayed in °C, °F and K (Kelvin).
·
Enable Firmware Update : If enabled, the CLD101x responds as a DFU device to an external
control PC (see Firmware Upgrade ), else the CLD101x is recognized as a USB Test and
Measurement Device.
2.5.11 Information
This screen gives information about
the device.
There are buttons to start a touch panel
calibration and to clear the
set point
memories .
2.5.12 External Modulation
To generate in Constant Current Mode a time dependent laser diode injection current "I
LD
" or in
Constant Power Mode a time dependent photodiode current "I
PD
", these current settings can be
modulated via an independent ground-symmetric modulation input " MOD IN ". Its input
resistance is >10 k
W
.
The relation between the externally applied modulation voltage and the resulting laser (photodiode)
current is described by the modulation coefficient
m
. The modulation coefficient is equal for all
models:
Constant Current mode:
m
= 150 mA / V
Constant Power mode - photo current range 2 mA:
m
= 200 µA / V
Constant Power mode - photo current range 20 mA:
m
= 2 mA / V
"I
LD
" and "I
PD
" are calculated as:
I
LD
= I
LD SET
+ U
MOD
*
m
(in constant current mode)
or I
PD
= I
PD SET
+ U
MOD
*
m
(in constant power mode)
60
20
7