Atec ILX-Lightwave-LDC-3916 - Manual (Page 2)

Front Panel Interface
Provides Simple Operation
The front-panel interface features a bright
vacuum fluorescent display, making the
information readable from almost any angle.
You can easily monitor the operations of up to
four channels at a time. Simple and intuitive
menus, supported by screen-specific soft-keys,
allow you to quickly configure and operate each
channel. Menu depths have been intentionally
limited to keep the front-panel operation con-
cise, while more sophisticated operations are
reserved for the GPIB interface. Setpoints and
other values can be entered through your choice
of numeric keypad entry, up-down arrow keys, or
a rotary adjustment knob.
Powerful GPIB Interface Offers
Robust, Automated Control
A powerful processor platform drives the
LDC-3916 16-Channel Laser Diode Controller.
When coupled with the latest GPIB technology
from National Instruments’ HS488 TNT chipset,
you get all the processing capability needed for
mission-critical production testing. With micro-
processors on each module, the mainframe
engine manages 16 independent control chan-
nels quickly and reliably. Free LabVIEW
®
instrument drivers are available upon request,
or by downloading them at
www.ilxlightwave.com.
High Performance Modules
Support Future System Expansion
Designed to provide the cleanest, safest
power available for laser diode control, each
module’s control functions are handled locally
and communicated quickly to the host pro-
cessor. On-board intelligence simplifies future
addition of modules since all operational and
calibration data is stored in the module. Simply
plug in your new module and power up the
system. Your mainframe never needs to leave
the rack. This simplicity, coupled with low-noise,
high-stability outputs and state-of-the-art laser
diode protection, equals ultimate performance.
State-of-the-Art Current Source
Design Brings New Levels
of Performance
This new current source topology uses an
innovative, proprietary control loop and incorpo-
rates the latest techniques for signal filtering and
circuit board shielding. These advancements
provide unbeatable stability and unparalleled
noise performance, ideal for the most demand-
ing production test applications. This design
also incorporates adjustable compliance voltage
and faster shutoff, helping prevent dangerous
“reconnect” transients that can occur from inter-
mittent connections between the controller and
your laser diode. This new level of protection
adds to our proven list of protection features:
independent current limits, output shorting cir-
cuits and a slow-start turn-on feature.
New Capabilities from the
Flexible Current Source You Trust
Operational modes including constant cur-
rent, constant current high-bandwidth, or
constant optical power are selectable from the
front panel, or via the GPIB interface. Mea-
surement of your laser diode’s forward voltage
is possible with 4-wire accuracy, which can be
helpful in production environments where longer
cable runs are common. A single, rear-panel
modulation port can individually enable direct
modulation of each channel’s laser current. This
new current source design supports modulation
bandwidths of up to 1.2 MHz (small signal),
achieving the highest direct modulation
TEC Modules
TEMPERATURE 3916550 3916558
CONTROL Dual 9W Single 24W (3 A)
TEMPERATURE
CONTROL OUTPUT
Temperature Control Range: 2 –99.9°C to 150°C –99.9°C to 150°C
Thermistor Setpoint
Resolution and Accuracy Resolution Accuracy 3 Resolution Accuracy 3
–20°C to 20°C: 0.1°C ±0.2°C 0.1°C ±0.2°C
20°C–50°C: 0.2°C ±0.2°C 0.2°C ±0.2°C
Short-Term Stability (1 hr.): 4 <±0.007°C <±0.007°C
Long-Term Stability (24 hrs.): 5 <±0.01°C <±0.01°C
Output Type: Bipolar current source Bipolar current source
Compliance Voltage: >6 V DC >8 V DC
Maximum Output Current: 1.5 A 3 A
Maximum Output Power: 9 W 24 W
Current Noise and Ripple: <1 mA rms 6 <2 mA rms 12
Current Limit Range: 0.1–1.6 A 0.1–3.10 A
Current Limit Set Accuracy: ±0.05 A ±0.05 A
Control Algorithm: Smart Integrator, Smart Integrator,
Hybrid PI Gain adjust- Hybrid PI Gain adjust-
able from 1–127 able from 1–127
TEMPERATURE SENSOR
Types: Thermistor Thermistor
(2-wire NTC) (2-wire NTC)
Thermistor Sensing Current: 7 10 µA/100 µA 10 µA/100 µA
Usable Thermistor Range: 25–450,000 Ω, typical 25–450,000 Ω, typical
User Calibration: Steinhart-Hart, Steinhart-Hart,
3 constants 3 constants
Dual Current Source Modules
*
3916332 3916334
CURRENT SOURCE
Dual 500 mA Dual 1A
LASER CURRENT OUTPUT
Output Current Range: 0–500 mA 0–1000 mA
Setpoint Resolution: 10 µA 20 µA
Setpoint Accuracy: 0.1% of FS 0.1% of FS
Compliance Voltage: 6 V 6 V
(adjustable voltage limit)
Temperature Coefficient: <50 ppm/°C <50 ppm/°C
Short-Term Stability (1 hr.): 2 <20 ppm <20 ppm
Long-Term Stability (24 hr.): 3 <50 ppm <50 ppm
Noise and Ripple 4
High Bandwidth: <10 µA rms <12 µA rms
Low Bandwidth: <5 µA rms <8 µA rms
Transients
Operational: 5 <3 mA <3 mA
1kV EFT: <4 mA <5 mA
Surge: 6 <8 mA <10 mA
LASER DRIVE LIMIT SETTINGS
Current Limit Range: 0–500 mA 0–1000 mA
Current Limit Resolution: 0.2 mA 0.4 mA
Current Limit Accuracy: ±0.7 mA ±1.4 mA
Voltage Limit Range: 0–7.5 V 0–7.5 V
Voltage Limit Resolution: 0.1 V 0.1 V
PHOTODIODE FEEDBACK
Type: Differential 10 Ω Differential 10 Ω
Input. Input.
Selectable Zero Selectable Zero
Bias or 5 V Bias or 5 V
Reverse Bias Reverse Bias
Photodiode Current Range: 0–5000 µA 0–5000 µA
Output Stability: 7 0.01% 0.01%
Setpoint Accuracy: ±0.1% of FS ±0.1% of FS
EXTERNAL ANALOG MODULATION
Input: 8 0–10 V, 50 Ω 0–10 V, 50 Ω
Transfer Function: 50 mA/V 100 mA/V
High Bandwidth Mode
Small Signal Bandwidth: 9 DC to 1.2 MHz DC to 1.0 MHz
Large Signal Bandwidth: 10 DC to 1.0 MHz DC to 1.0 MHz
Low Bandwidth Mode: DC to 30 kHz DC to 30 kHz
3916332 3916334
Dual 500 mA Dual 1A
LASER CURRENT
MEASUREMENT (DISPLAY)
Output Current Range: 0–500.0 mA 0–1000.0 mA
Output Current Resolution: 0.01 mA 0.01 mA
Output Current
Accuracy (@25°C): ±0.05% of FS ±0.05% of FS
Photodiode Current Range: 0–5000 µA 0–5000 µA
Photodiode Current Resolution: 0.1 µA 0.1 µA
Photodiode Current
Accuracy (@25°C): ±2 µA ±2 µA
Photodiode Responsivity
Range: 11 0.00–1000.00 µA/mW 0.00–1000.00 µA/mW
Photodiode Responsivity
Resolution: 0.01 µA/mW 0.01 µA/mW
Optical Power Range: 0.0– 5000.00 mW 0.0– 5000.00 mW
Optical Power Resolution: 100 µW 100 µW
Forward Voltage Range: 0.00– 7.5 V 0.0– 7.5 V
Forward Voltage Resolution: 10 mV 10 mV
Forward Voltage Accuracy: 12 ±7 mV ±7 mV
DUAL CURRENT SOURCE NOTES
*Two isolated laser sources in each module.
1 All values relate to a one-hour warm-up period.
2 Over any one-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 1000 V power-line transient spike. Tested to
ILX Lightwave Technical Standard #LDC-00196. Request ILX Application Note #3.
7 Maximum monitor photodiode current drift over any 30-minute period. Assumes zero drift in
responsivity of photodiode.
8 Modulation input is 50 Ω terminated inside the mainframe.
9 250 mA setpoint, 50 mA modulation current, 1 Ω load.
10 50% modulation at mid-scale output, 1 Ω load, High Bandwidth Mode.
3916550 3916558
Dual 9W Single 24W (3 A)
TEC MEASUREMENT (DISPLAY)
Temperature
Range: 8 –99.9°C to 199.9°C –99.9°C to 199.9°C
Accuracy: ±0.5°C ±0.5°C
Thermistor Resistance
10 µA Setting
Range: 0.01–450.00 kΩ 0.01–450.00 kΩ
Accuracy: ±0.05 kΩ 9 ±0.05 kΩ 9
100 µA Setting
Range: 0.001–45.000 kΩ 0.001–45.000 kΩ
Accuracy: ±0.005 kΩ 10 ±0.005 kΩ 10
TEC Current
Range: –1.50 to 1.50 A –3.00 to 3.00 A
Accuracy: ±0.04 A ±0.04 A
Voltage
Range: –9.999 to 9.999 V –10.75 to 10.75 V
Resolution: 100 mV (1 mV in GPIB) 100 mV (1 mV in GPIB)
Accuracy: 11 ±70 mV (±20 mV in GPIB) ±70 mV (±20 mV in GPIB)
NOTES
See Current Source Notes and Temperature Control Notes under
Controller Modules Specifications.
LDC
3916
16-Channel
Laser Diode
Controller
LDC
3916
16-Channel
Laser Diode
Controller