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Benchtop Laser Diode Controller; 500 mA Laser Diode Driver with 28W TEC Controller

  • LDC-169 Laser Diode Controller, 500 mA
  • Laser Diode Control software user interface
  • 500mA Butterfly Laser Diode Controller Pinout
  • 500mA Butterfly Controller Connections
  • 500mA Laser Diode Controller Front Panel

sku / item#: LDC-691
ships: Request a Quote for Current Ship Date

Key Features
  • Low Noise, High Stability 500mA Laser Diode Current Source with 28 Watt TEC Temperature Controller
  • Designed for Use with Single Frequency and Single Mode Laser Diodes
  • RS232 Interface with LabVIEW Drivers; Analog and Digital Modulation
  • USB Control Available as an Option
  • Previously Sold as PN LDC-169

Price and Delivery Quote

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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.

Technical Questions for this Product


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Why do Scientists & Engineers Choose Laser Lab Source?

PRICE $2535.00
  • Output Current Range: 0.00 - 500.00 mA
  • Compliance Voltage Range: 14.00 Volts
  • Current Noise & Ripple (rms): < ± 0.2% of Full Scale Current
  • Current Setpoint Resolution: 300 μA
  • Current Setpoint Accuracy: ± 0.5%
  • Current Stability (4 hours): ≤ 150 ppm (@ full scale)
  • Current Limit Setpoint Accuracy: ± 2%
  • Photodiode Current Measurement Accuracy: ± 0.5%
  • Photodiode Current Measurement Range: 0.00 - 4,000 μA
  • Soft-Start Current Ramp to Setpoint (User Programmable)
  • Soft-Start Current Ramp Factory Default Set to 300 Milliseconds
  • User Set Current Limit
  • User Set Temperature Limits (Upper and Lower)
  • Open Circuit Detection and Fast Shut-Down
  • Short Circuit when Laser Diode Current Turned OFF
  • ESD and Power Surge Clamp
  • Reverse Voltage Transient Clamp
  • Factory Pre-Set Default Upper Temperature Limit: 35°C
  • AC Line Filter
  • Rear Panel Keylock Switch and Safety Interlock
  • TEC Output Power Total: 28 Watts
  • TEC Output Current Range (bipolar): ± 2.00 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
  • TEC Output Stability: ± 0.01°C (subject to ambient temp. stability)
  • Temperature Range: -25°C to 150°C
  • Factory Set Default Lower Temperature Limit: 5°C
  • Factory Set Default Upper Temperature Limit: 35°C
  • QCW Pulse Width Rise and Fall Time: 2 μs
  • Pulse Time Base Accuracy: ± 1.0%
  • QCW Mode 1: User Adjustable Pulse Width and Repetition Rate using Internal Pulse Generator
  • QCW Mode 2: External Trigger to Internal Pulse Generator: Rising Edge Triggered QCW Pulse with Internally Adjusted Pulse Width
  • 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
Auxiliary Functions
  • Temperature Sensor Input: 10kΩ NTC Thermistor
  • External Fan Control Circuit, 1 - 24V, 500mA (max)
  • Laser-On External LED Indicator: 5mA Output
  • Pilot Laser Anode, vs. Ground: (5V, 150 mA)
  • Photodiode Input, Anode and Cathode
USER INTERFACE and Connectors
  • Front Panel: Alphanumeric LCD
  • USB Optional: $95.00 (Option SVC-USB)
  • LabView Drivers Included
  • Laser and Peltier Connector: SubD-15, Female
  • RS232 Connector: SubD-9, Female
  • Safety Interlock: Jack Connector, Stereo 3.5mm
  • Universal 110V ~ 240 VAC Input
  • Dimensions: 85 mm x 105 mm x 200 mm
Recommended Accessories
  • kab-39 Unterminated Connecting Cable -or-
    kab-231 Terminated Connecting Cable
  • acc-417 USB-RS232 Converter

Product Overview:

500 mA / 28 W Benchtop Laser Diode Controller Overview

The model LDC-691 laser diode controller offers precision current and temperature control to your laser diode at an affordable price. These units offer a 500 mA low noise laser diode bias current source with a 28 watt TEC temperature controller. Both functions are integrated into a simple to operate benchtop instrument.

Laser Diode Protection Features

These units offer the highest level laser diode protection available to ensure that your device under test is protected at all times. Soft-start current, current and temperature limits, and a fast shut-down sequence keep your device protected at all times. Additionally, transient filters and AC line filters protect the laser against brown-out or black-out power conditions. The precision TEC controller offers a full P.I.D. control loop for fast and efficient thermal stabilization.

A back-panel safety interlock connector ensures that the laser diode current is not switched on until the user has determined it is safe to do so.

Temperature Controller Features:

The full PID loop provides millidegree temperature stability, and can quickly stabilize high heat loads to the temperature set-point 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 Pulse Modes:

In addition to CW (continuous wave) mode of operation, the LDC-691 laser diode controller offers flexible modulation capabilities and a QCW mode. The rear panel of the controller has a BNC input for an analog or TTL digital modulation input with a 10k Ω input impedance. The controller has an internal function generator which can be used to set the quasi-CW pulses. In QCW mode, the user can also set the 100μs to CW pulses from a remote TTL signal source.

Intuitive Front Panel User Interface

The user also complete control of all laser diode bias and temperature control parameters through an intuitive front panel menu. The front panel has an LCD display with a key pad. For remote control, these systems come with a standard RS-232 interface and can be ordered with an optional USB interface. The LabView GUI (included) makes set-up and control of the system fast and simple.

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