Home  >  Laser Diode Drivers  >  OsTech   >  LDI-344


125 Amp Laser Diode Driver for High Power Laser Bars, Stacks and Arrays

  • main-img-high-power-laser-diode-driver-key-features-master-img-8
  • laser diode driver pulse and CW rear panel
  • laser-diode-driver-tech-support-infographic-7
  • High Power Laser Diode Pinout
  • laser-diode-driver-ldi-front-panel-bullet-breakout-8
  • LDI-344 Auxiliary Functions Pinout
  • High Power Laser Diode Driver Connectors
  • laser diode driver screen capture image

sku / item#: LDI-344
ships: Request a Quote for Current Ship Date

Key Features
  • Protection Features Optimized for High Power Laser Diode Bars and Arrays
  • CW Mode and Integrated QCW Pulse Generator
  • QCW Pulse Width Range 29 μs to CW
  • Open Circuit Detection and Fast Shut-Down with Analog Control Loop
  • RS232 with LabView Drivers
  • USB Interface Optional (Inquire)

Price and Delivery Quote

Buy Now / Add to Cart

Select Cables and Accessories for this Controller

Technical Questions for this Product


Customers Also Considered:

Why do Scientists & Engineers Choose Laser Lab Source?

PRICE $5525.00
  • Output Current Range: 125.00 Amps
  • Compliance Voltage Range: 0.12 -12.00 Volts
  • Current Noise & Ripple (rms): < ± 0.5% ( of full scale current )
  • Current Setpoint Resolution: 30 mA
  • Current Setpoint Accuracy: ± 0.5%
  • Current Stability (4 hours): ≤ 300 ppm
  • Current Limit Setpoint Accuracy: ± 2%
  • Soft-Start Current Ramp Factory Default Set to 300 Milliseconds; User Adjustable
  • User-Programmable Current Limit
  • Open Circuit Detection
  • ESD and Power Surge Clamp, AC Line Filter
  • Reverse Voltage Transient Clamp
  • Rear Panel Keylock Switch and Safety Interlock
  • Short Circuit when Laser Diode Current Turned OFF
  • Front Panel e-Stop Button Emergency Shut-Down
  • QCW Pulse Width Rise/Fall Time: 29 μs to CW, 10%-90%
  • Integrated QCW Pulse Generator, also Accepts External Trigger for QCW Pulses
  • Pulse Time Base Accuracy: ± 1.0%
  • Modulation Input & Output: 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 and connections
  • Interlock Status Indication (12 V, 100 mA)
  • Laser On/Off Status Indication (TTL; On = High)
  • System OK Status Indication (TTL; Good = High)
  • External 5V Reference Output
  • Multiple Auxiliary Analog and TTL Signal Ports
  • Pilot Laser Output; Pilot Laser On/Off
  • External Cooling Fan Output (1 - 24V, 800 mA)
  • External Temperature Sensor Input (NTC 10kΩ @ 25°C)
  • External Safety Interlock Connector
User INTERFACE and Connectors
  • Front Panel: Alphanumeric LCD with Key Pad
  • RS232 Interface: SubD-9, Female
  • USB Optional: $95.00 (Option SVC-USB)
  • LabView Drivers Included
  • Laser Diode Connector: SubD-13W6, Female
  • Auxiliary Functions Connector: SubD-25 female
  • Safety Interlock: Jack Connector, Stereo 3.5mm
  • Power Input: Universal 100V ~ 240 VAC, 50/60 Hz
  • Dimensions: 89 mm (H) x 482 mm (W) x 266 mm (L)
  • Chassis Height: 2U (Standard Rack-Mount Units)
Recommended Accessories
  • acc-417 USB-RS232 Converter

Product Overview:

125 Amp Laser Diode Driver for High Power Laser Bars, Stacks and Arrays

The LDI-344 series high power drivers for laser diodes offer up to 125 amps of bias current at a maximum voltage of 12V. They have integrated laser diode protection features such as current limit, soft start current ramp and power surge filters to make sure that your laser diodes are protected at all times. Additionally, these units offer CW, modulated, and Quasi-CW (QCW) slow pulsed modes and have an integrated function generator. Pulse width's as narrow as 29 microseconds are achievable.

The driver is packaged in a rack-mount 19 inch width chassis, and have a front panel keypad for fast, simple set-up.

Customized Protection for High Power Laser Bars and Arrays

These current sources feature multiple levels of built-in laser diode protection which have been optimized for high power bars and arrays. One of the unique features is a user programmable soft-start ramp of the bias current to the device under test. The factory sets the ramp time to 300 milliseconds as a default, but the user can adjust this time period from 1 millisecond up to 10's of seconds. This current ramp up and down function is designed to protect the laser from thermal shock during power up and down sequences.

The LDI-334 also offers features such as current limit, a brown-out and black-out power surge clamp, AC line filters, and a fast response to shunt the current in the event of an open circuit. There is an interlock safety connection as well as a front panel Emergency-Stop kill switch to ensure the laser is operated only when the user has determined it is safe to do so.

Laser Driver Control User Interface

The LDC-334 front-panel controls provide fast and simple setup, and an RS232 interface with LabView drivers is included standard. The LabView GUI makes set-up and control of the system fast and simple. An optional USB digital interface is available; inquire for details on ordering the USB control option.

Controller Power Interface

The LDC-334 utilizes high current DSUB-5W5 style connector on the rear panel. A 15-pin D-sub connector is included for ancillary control functions, including external photodiode measurement, Laser-On Indicator LED, temperature sensor input, and an external cooling fan control.

Why do Scientists & Engineers Choose Laser Lab Source?

  • Get DIRECT, Fast Tech-Support from the Product Engineer, No Sales Person in the Middle

  • Get the Lowest Price, Factory Direct, No Mark-Up's, Suppliers Post their Own Price

  • Get a 30 Day Evaluation Period with No Risk Return on Most Products, Check Availability