SRS Stanford Research Systems Model LDC500 Series Laser Diode
Controller LDC501 LDC502
Description of SRS Stanford Research Systems LDC500 LDC501 LDC502 Laser Diode Controller
Introducing the LDC500 Series Laser Diode Controllers—highly stable, low-noise current sources, with integrated temperature
controllers—all at very affordable prices. The LDC500 series are the ideal instruments for controlling the
current and temperature of your laser diodes. They have the
performance and features you expect from instruments costing twice
as much.
The LDC500 series are the ideal instruments for controlling the
current and temperature of your laser diodes. They have the
performance and features you expect from instruments costing twice
as much. The LDC501 has up to 500 mA of output current with less
than 1.1 µA of rms noise, while the LDC500 has up to 100 mA of
current and less than 0.3 µA of noise. The LDC502 provides up to 2
A of current.
With a low-noise current source, a 36 W high-precision temperature
controller, and standard computer interfaces including Ethernet,
the LDC500 series is the right choice for your laser diode testing
and control applications.
Easy-To-Use Interface
The LDC500 series have an intuitive user interface, and many first
time users will be able to operate the instrument without having to
crack open the manual (although we do recommend reading the
manual). Unlike competitive models, the LDC500 series controllers
have a dedicated front-panel display for parameter entry. You don't
have to sacrifice monitoring temperature or current to simply
change an instrument setting—you have a separate two-line, blue
alpha-numeric display for that. In addition, bright 5-digit green
LED displays constantly monitor current and temperature, and are
large enough to easily read from anywhere in the lab.
Linear Power Supplies
Independent linear power supplies are used for the laser diode
controller and the temperature controller. The supplies are
designed with a magnetically shielded toroidal transformer, and
provide ultra-clean, stable isolated power.
Stable Laser Diode Controller
To ensure a stable optical output from your laser diode, the LDC500
series LD controllers were designed to deliver noise-free,
precision operation. They are accurate to ±0.01 % FS, have
automated testing setups, noise is as low as 0.3 µA rms, and they
meet a drift specification of 10 ppm/°C.
The controllers have two modes of operation for the laser diode:
constant current and constant power. Constant current mode (CC)
programs the source to a precise DC amplitude. Alternatively, the
constant optical power mode (CP) servos the current source to
maintain a constant signal on a monitor photodiode. Both control
modes allow you to add an external modulation signal, with
adjustable bandwidth up to 1 MHz (in CC mode) or 10 kHz (in CP
mode).
Another convenient feature that the LDC500 series offers is a fully
programmable photodiode bias voltage. You can set the bias between
0 and 5 V from the front panel, or remotely using one of the
computer interfaces.
36 W Temperature Controller
The LDC500 series integrated 36 W temperature controller lets you
adjust temperature with 0.001 °C resolution, and measure
temperature with 0.01 °C accuracy (with a calibrated sensor). It
maintains a typical stability of 0.0005 °C/°C with respect to room
temperature, and has a very wide temperature control range.
The TEC controller also has two modes of operation: constant
temperature mode (CT) controls the TEC current to maintain a fixed
temperature (or raw sensor value), while constant current mode (CC)
operates the TEC at a fixed current. Thermistor, RTD and IC sensors
are all supported.
The LDC500 series offers an auto-tuning feature which automatically
optimizes the PID loop parameters of the controller. Of course,
full manual control is provided too. Dynamic transfer between CT
and CC modes for the TEC is also easy—just press the Temp/Current
button.
Laser Diode Protection
Multiple laser diode protection features, including slow start
turn-on, adjustable current limits, and adjustable compliance
voltage, keep your laser diodes safe when unexpected events occur.
Fast clamping and shut down provide extra protection against
intermittent contact with the laser. Combined, these features
provide trouble-free, safe control of your laser diode.
Computer Control
Remote operation of the LDC500 series is supported with GPIB,
RS-232 and Ethernet interfaces. All instrument functions can be
controlled and read over any of the interfaces. Up to nine complete
instrument configurations can be saved in non-volatile RAM and
recalled at any time. A TTL trigger output is also available to
synchronize other test equipment.
Bumpless Transfer
A unique feature of the LDC500 series is dynamic “Bumpless
Transfer” between CC and CP modes. This feature means you don't
have to shut down your laser to switch modes — simply press the
Current/Power button.
Key Features of SRS Stanford Research Systems LDC500 LDC501 LDC502 Laser Diode Controller
Laser Diode Driver
- 100 mA, 500 mA or 2 A source
- Ultra-low drift (<10 ppm/°C)
- <0.3 µA current noise (LDC500)
- GPIB, RS-232 and Ethernet
TEC Controller
- 36 W output power
- Ultra-high stability (0.0005 °C/°C)
- Auto-tuning of loop parameters
- CC & CT mode dynamic switching
Specification of LDC500 LDC501 LDC502
| Laser Diode Current Source | Monitor Photodiode |
| Current Source | Bias voltage | 0 to 5 V, programmable |
| Range | 0 to 100 mA, 0 to 50 mA (LDC500) | PD current range | 0 to 5000 µA (LDC500 & LDC501), |
| 0 to 500 mA, 0 to 250 mA (LDC501) | 0 to 10,000 µA (LDC502) |
| 0 to 2 A, 0 to 1 A (LDC502) | Setpoint resolution | 0.1 µA (CP mode) |
| Setpoint resolution | 1 µA(LDC500), 10 µA (LDC501), 0.1 mA (LDC502) | Setpoint accuracy | ±2 µA (LDC500/LDC501) |
| Accuracy | ±0.02 % of full scale | ±4 µA(LDC502) |
| Output impedance | >1 MΩ (DC) | Measurement & Display |
| Stability | | Output current |
| Thermal | <10 ppm/°C | Resolution | 1µA (LDC500), 10µA (LDC501), 0.1 mA (LDC502) |
| Short-term | <5 ppm full scale (1 hr.) | Accuracy | ±0.02 % FS |
| Long-term | <15 ppm full scale (24 hr.) | Photodiode current |
| Noise | LDC500 (10 Hz to 1 MHz) | Resolution | 0.1 µA |
| 0.9 µA rms (high range / high bandwidth) | Accuracy | ±0.02 % FS |
| 0.6 µA rms (high range / low bandwidth) | Laser diode forward voltage |
| 0.5 µA rms (low range / high bandwidth) | Resolution | 1 mV |
| LDC501 (10 Hz to 1 MHz) | Accuracy | ±0.02 % FS ( 4 wire) |
| 4.5 µA rms (high range / high bandwidth) | Temperature Controller |
| 1.5 µA rms (high range / low bandwidth) | Temperature Control |
| 2.3 µA rms (low range / high bandwidth) | Control range |
| 1 µA rms (low range / low bandwidth) | IC sensor | -55 °C to +150 °C |
| LDC502 (10 Hz to 1 MHz) | Resistor sensor | -150°C to +250 °C (10 Ω to 500 kΩ) |
| 25 µA rms (high range / high bandwidth) | Setpoint resolution |
| 5.0 µA rms (high range / low bandwidth) | Temperature | 0.001 °C |
| 10 µA rms (low range / high bandwidth) | Resistance | 0.1 Ω |
| 3.5 µA rms (low range / low bandwidth) | Setpoint accuracy |
| Compliance | | Temperature | ±0.01 °C (sensor dependent) |
| Range | 0 to 10 V, programmable | Resistance | 0.1 % of sensor resistance |
| Resolution | 10 mV | Stability (typ.) | (using a 10 kΩ NTC thermistor) |
| Accuracy | 0.2 V | Thermal | 0.0005 °C/°C (vs. ambient) |
| Current limit | Short term | ±0.001 °C (1hr.) |
| Range | 0 to 100 mA, 0 to 50 mA (LDC500) | Long term | ±0.002°C (24 hr.) |
| 0 to 500 mA, 0 to 250 mA (LDC501) | Control algorithm | PID |
| 0 to 2 A, 0 to 1 A (LDC502) | Auto-tuning | Step response |
| Resolution | 10 µA (LDC500 & LDC501), 0.1 mA (LDC502) | Temperature Sensors |
| Accuracy | ±0.1 mA (LDC500 & LDC501), ±0.4 mA (LDC502) | Thermistors | 10 Ω to 500 kΩ (10 µA, 100 µA, 1000 µA excitation) |
| | RTD | Pt-100, Pt-1000 (1 mA excitation) |
| Analog Modulation | IC voltage sensors | LM335 and equivalent |
| Input range | -10 V to +10 V | IC current sensors | AD590 and equivalent |
| Input impedance | 2 kΩ, typ. | TEC Output |
| Gain | Source type | Linear, bipolar current source |
| CC mode | LDC500 | Current range | -4.5 A to +4.5 A |
| 10 mA/V (high range), 5 mA/V (low range) | Setpoint resolution | 1 mA |
| LDC501 | Setpoint accuracy | ±5 mA |
| 50 mA/V (high range), 25 mA/V (low range) | Max. power | 36 W |
| LDC502 | Compliance voltage | >8 VDC |
| 200 mA/V (high range), 100 mA/V (low range) | Current noise | <0.1 mA rms @ 1 A output, <0.2 mA rms @ 4 A output (10 Hz to
1 MHz) |
| CP mode | LDC500 & LDC501 | Current limits |
| 500 µA/V (PD current) | Range | 0 to 4.5 A |
| LDC502 | Accuracy | ±5 mA |
| 1000 碌A/V (PD current) | Instrument connectors | DB9-F (laser diode), DB15-F (TEC) BNC (modulate, trigger output) |
| Bandwidth (-3 dB) | Remote interfaces | GPIB (IEEE488.2), RS-232, Ethernet |
| CC mode | DC to 1.0 MHz (high bandwidth, LDC500 & LDC501) | Power | 100/120VAC or 220/240VAC, 50Hz/60Hz, 100W |
| DC to 0.8 MHz (high bandwidth, LDC502) | Dimensions | 7"×5"×15" (WHL) |
| DC to 10 kHz (low bandwidth, LDC500/ LDC501/ LDC502) | Weight | 15 lbs. |
| CP mode | DC to 5 kHz (high bandwidth) | Warranty | One years parts and labor on defects in material and workmanshi |
| DC to 100 Hz (low bandwidth) | | |
Ordering Information for LDC500 LDC501 LDC502
LDC500 Laser Diode Controller
LDC501 Laser Diode Controller
LDC502 Laser Diode Controller
O500RM Rack mount tray for LDC series
O500C1 6' LD cable w/ flying leads
O500C2 6' TEC cable w/ flying leads
O500C3 6' LD cable w/ D connector
O500C4 6' TEC cable w/ D connector
O500C5 12' LD cable w/ D connector
O500C6 12' TEC cable w/ D connector
FAQ:
1.Can you ship order to Canada or Australia?
Yes,we can .We send orders worldwide.
2. What delivery method do you use? and delivery time?
We can ship by EMS,DHL,FedEx,UPS,TNT with tracking number. Usual
delivery time is 4-7 workdays.
3. What is your payment term?
100% T/T payment before shipment.
4. How can I ask any other question?
You can contact us online or leave us messages below.
