ILX Lightwave LDC-3700C Series, User Manual, Page: 23 / 176

I N T R O D U C T I O N A N D S P E C I F I C A T I O N S
Laser Current Source Specifications
1
04_09 LDC-3700C Series
7
C H A P T E R
1

LASER CURRENT SOURCE NOTES
1. All values after a one-hour warm-up period at room temperature, 25°C.
2. Over any 1-hour period, half-scale output.
3. Over any 24-hour period, half-scale output.
4. Measured optically, evaluating noise intensity of a laser diode into a photodetector with 150 kHz bandwidth.
5. Maximum output current transient resulting from normal operational situations (e.g., power on-off, current on-off), as well as accidental situations (e.g.,
power line plug removal).
6. Maximum output current transient resulting from a 1000V power-line transient spike.
7. Maximum monitor photodiode current drift over any 30 minute period. Assumes zero drift in responsivity of photodiode.
8. 50% modulation depth at mid-scale output. Higher bandwidth is possible with smaller modulation signal.
9. Responsivity value is user-defined and is used to calculate the optical power.
10. Four wire voltage measurement at the load. Voltage measurement accuracy while driving calibration load. Accuracy is dependent upon load and cable
used.
LDC-3714C LDC-3724C LDC-3744C
Accuracy, setpoint (% of FS) ±0.05% ±0.05% ±0.05%
EXTERNAL ANALOG MODULATION
Input 0 - 10 V, 1 k

0 - 10 V, 1 k

0 - 10 V, 1 k

Transfer Function 5 mA/V
10 mA/V 20 mA/V
50 mA/V 200 mA/V
400 mA/V
Bandwidth (3 dB)
8
High Bandwidth
DC to 1 MHz DC to 1 MHz DC to 250kHz
Low Bandwidth
DC to 15 kHz DC to 15 kHz DC to 10 kHz
TRIGGER OUTPUT
Type TTL TTL TTL
Pulse Width 13 µs 13 µs 13 µs
Delay 12 ms 12 ms 12 ms
MEASUREMENT (DISPLAY)
Output Current Range 0 to 50.000 mA
0 to 100.00 mA 0 to 200.00 mA
0 to 500.00 mA 0 to 2000.0 mA
0 to 4000.0 mA
Output Current Resolution 0.001 mA 0.01 mA 0.1 mA
Output Current Accuracy ±0.05% FS ±0.05% FS ±0.1% FS
Photodiode Current Range 0 to 5000 µA 0 to 5000 µA 0 to 10000 µA
Photodiode Current Resolution 1 µA 1 µA 1 µA
Photodiode Current Accuracy ±2 µA ±2 µA ±4 µA
PD Responsivity Range (µA/mW)
9
0.00 to 1000.00 0.00 to 1000.00 0.00 to 1000.00
PD Responsivity Resolution (µA/mW) 0.01 for all product ranges
Optical Power Range (mW) 0.00 to 100.00 0.00 to 500.00 0.00 to 5000.0
Optical Power Resolution (mW) 0.01 0.01 0.1
Forward Voltage Range (V) 0.000 to 10.000 0.000 to 10.000 0.000 to 10.000
Forward Voltage Resolution 1 mV 1 mV 1 mV
Forward Voltage Accuracy
10
±2 mV ±2 mV ±2 mV