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Benchtop Laser Diode Driver and TEC Controller; Advanced Multi-Level Laser Diode Protection; 20A / 30V driver range; 216W TEC controller

$3525.00  
sku / item#: LDC-467
ships: 7 to 10 days

Key Features
  • Advanced multi-level protection features to safeguard your laser diode:
    - Soft-start current ramp
    - Current & temperature limits
    - Power surge & ESD clamp circuit
    - Transient suppression filters
  • Low noise, high stability laser diode current source
  • Full P.I.D. TEC controller provides fast, precise thermal control
  • Simple to use front panel LCD display with keypad
  • RS232 and USB interface, LabVIEW drivers, GUI software, open-source terminal program
  • Analog and digital modulation; CW and QCW modes of operation
Product Warranty
All products purchased from Laser Lab Source
are sold with a full one-year warranty.
See terms & conditions for full details.
The Laser Lab Source group websites include:
  • LaserDiodeSource.com
  • LaserLabSource.com
  • LaserDiodeControl.com

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Select Cables and Accessories for this Controller


This cable is also available terminated on the
controller end with a 15-pin d-sub connector (male) and
15-pin d-sub connector (female) on the device-end (kab-231).


This cable is also available terminated on the
controller end with a 15-pin d-sub connector and
unterminated on the device-end (kab-39).


This cable is also available terminated on the controller
end with a 2W2 d-sub connector (male) and a
2W2 d-sub connector (female) on the device end (kab-297).


This cable is also available terminated on the controller
end with a 2W2 d-sub connector (male) and unterminated
on the device-end (kab-286).

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Why do Scientists & Engineers Choose Laser Lab Source?

MODEL LDC-467
PRICE $3525.00
LASER DIODE BIAS CURRENT AND VOLTAGE OUTPUT
  • Output Current Range: 0.00 - 20.00 Amps
  • Compliance Voltage Range: 0.00 - 30.00 Volts
  • Current Noise & Ripple (rms): < 4 mA
  • Current Setpoint Resolution: 5 mA
  • Current Setpoint Accuracy: ± 0.5%
  • Current Stability (4 hours): ≤ 150 ppm
  • Current Limit Setpoint Accuracy: ± 2%
  • Photodiode Current Measurement Range: 0.00 - 4,000 μA
INTEGRATED LASER DIODE PROTECTION FEATURES
  • Soft-Start Current Ramp Factory Default Set to 300 Milliseconds; User Adjustable
  • User-Programmable Current Limit
  • Temperature Limits (Upper and Lower)
  • Open Circuit Detection; Short Circuit when Laser Diode Current Turned OFF
  • Short Circuit when Laser Diode Current Turned OFF
  • ESD and Power Surge Clamp, AC Line Filter
  • Reverse Voltage Transient Clamp
  • Factory Pre-Set Default Upper Temperature Limit: 35°C
  • Rear Panel Keylock Switch and Safety Interlock
TEC CONTROLLER OUTPUT
  • TEC Output Power Total: 216 Watts
  • TEC Output Current Range (bipolar): ± 12.00 Amps
  • TEC Output Voltage Range (bipolar) : ± 14.00 Volts
  • Temperature Sensor Inputs: 10 kΩ Thermistor, NTC, PT100, PT1000
  • TEC Control Loop Algorithm: Full P.I.D.
  • P.I.D. Variables: User Adjustable to Optimize Temp. Settling Speed
  • TEC Setpoint Resolution: 0.01°C
  • Temperature Range: -25°C to 150°C
  • Factory Set Default Lower Temperature Limit: 5°C
  • Factory Set Default Upper Temperature Limit: 35°C
MODULATION & QCW MODE
  • QCW Mode Pulse Rise and Fall Time: < 25μs, 10%-90%
  • QCW Pulse Mode Patterns: Continuous, Single Pulses, Bursts
  • QCW Mode Trigger: Internal Function Generator or External Trigger
  • Modulation Input: BNC, Digital (TTL) or Analog, 10kΩ Impedance
  • Modulation Input Voltage Range: 0 ~ 4 Volts (4V = Max Current)
  • Analog Modulation Bandwidth: 1 Hz – 20 kHz
AUXILLARY FUNCTIONS
  • Temperature Sensor Input: 10kΩ NTC Thermistor
  • Laser-On External LED Indicator: 5mA Output
  • Pilot Laser Anode, vs. Ground: (5V, 150 mA)
  • Photodiode Cathode (Analog Connected to Gnd)
  • External Fan Control Circuit, 1 - 24V, 800mA (max)
USER INTERFACE AND CONNECTORS
  • Front Panel: Alphanumeric LCD
  • USB Interface Included
  • LabView Drivers Included
  • Support and Peltier Connector: SubD-15, Female
  • Laser Connector: SubD-2W2, Female
  • RS232 Connector: SubD-9, Female
  • Safety Interlock: Jack Connector, Stereo 3.5mm
DIMENSIONS AND POWER INPUT
  • Power Input: Universal 100V ~ 240 VAC, 50/60 Hz
  • Dimensions: 127 mm (H) x 200 mm (W) x 275 mm (L)
RECOMMENDED ACCESSORIES
  • kab-39 Unterminated Connecting Cable -or-
    kab-231 Terminated Connecting Cable
  • kab-286 Unterminated Power Cable -or-
    kab-297 Terminated Power Cable

Product Overview:

High Performance Benchtop Laser Diode Driver and TEC Controller

The LDC series laser diode controller combines a precision laser diode driver with an integrated thermoelectric temperature controller / TEC controller . These benchtop instruments are designed to safely, precisely bias and thermally stabilize your laser diode. The LDC series controllers are precision-engineered to meet the most demanding laboratory R&D requirements. They are also designed to safeguard the laser diode under test and offer comprehensive protection features to prevent damage to your laser diode.

Laser Diode Protection Features

These units offer the highest level of commercially available laser diode protection to ensure that your laser is protected from damage. Current and voltage limits, upper and lower temperature limits, and a fast shut-down sequence keep your device protected at all times. The following protection features combine to safeguard your laser diode:
  • Soft-Start Current Ramping: Gradually increases current to prevent sudden surges that could damage the laser diode. The LDC series units offer the ability for the user to customize the ramp time if desired. The factory default is set to 300 milliseconds.
  • Over-current Protection: Prevents excessive current from flowing into the laser diode.
  • Over-voltage Protection: Limits the voltage applied to the laser diode.
  • Reverse Voltage Protection: Protects against accidental polarity reversal which can permanently damage the diode.
  • Thermal Shutdown: Monitors the controller’s temperature and automatically shuts down if over-heating occurs.
  • Current Limit: Allows users to define a maximum current threshold to safeguard the diode.
  • Compliance Voltage Limit: Ensures the voltage supplied to the diode remains within safe operating conditions.
  • Transient Suppression: Filters out power supply transients and electrical noise that could cause instability.
  • Short-Circuit Protection: Detects and prevents damage caused by accidental short circuits in the laser diode current circuit.
  • Interlock Safety Mechanism: Requires an external hardware switch or key to enable laser operation, adding an extra layer of safety.

Constant Current Source Laser Diode Driver

The LDC series controllers are based on high stability, low-noise current source topology to ensure optimal performance from your laser diode. They provide exceptionally low drift, allowing for consistent and repeatable results. The constant current source topology is based on a precision sense resistor which is placed in series with the laser diode. The voltage across this sense resistor is fed into a differential amplifier, which compares it to the reference voltage. If the measured current deviates from the setpoint, the feedback loop adjusts the control voltage applied to the pass transistor (MOSFET). The transistor acts as a variable resistor, dynamically adjusting to maintain the desired current. The current source automatically adjusts its output voltage to meet the laser's requirements while keeping the current constant.

Integrated TEC Controller

The advanced TEC controller circuit with a full P.I.D. control loop prevents overheating of the laser diode and is designed to reduce thermal fluctuations. Precise thermal stabilization ensures consistent laser output without drift. The TEC control loop provides millidegree temperature stability and can quickly stabilize high heat loads to reduce the risk of damage to your laser. User adjustable upper and lower temperature limits can be programmed to protect the laser diode and the Peltier device. Additionally, TEC output current limits are user-configured to protect the Peltier device from over-drive damage.

Modulation, Internal Function Generator and QCW Modes

In addition to CW (continuous wave) mode of operation, the LDC series laser diode controllers offer flexible modulation capabilities and a built-in QCW function generator. The rear panel of the controller has a BNC input for analog or TTL digital modulation inputs with a 10k Ω input impedance. The controller has an internal function generator which can be used to set the quasi-CW (QCW) pulses. In QCW mode, the user can also set QCW pulses from a remote TTL signal source or by using the internal function generator.

User Interface: Front Panel LCD Display with Keypad | RS232 & USB Interfaces | Analog Signal Controls

These driver & tec controller units offer multiple user interface options. The user has complete control of all laser diode parameters through an intuitive front panel menu. The front panel has an LCD display with a keypad. For remote control, these units come standard with a RS-232 interface and USB adapter. The LabView GUI (included) makes set-up and control of the system fast and simple. An open-source terminal software program is also available for download. The user can also control the unit using analog controls signal inputs available on the rear panel.

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