Home  >  Laser Diode Drivers  >  OsTech   >  LDI-187


20 Amp Laser Diode Driver; CW + QCW Modes; Enhanced Laser Diode Protection Features

sku / item#: LDI-187
ships: 14 to 18 days

Key Features
  • Enhanced Laser Diode Protection Features Designed for Pump Laser Diodes
  • Designed for Electrically Biasing Pump Laser Diodes (808 / 915 / 976 / 980 nm)
  • User Interfaces: Front Panel Key Pad / USB / RS-232 Interface, Includes LabVIEW Drivers and GUI
  • Output 0 ~ 20 Amps, 6 Volt Compliance Voltage Range
  • USB / RS-232 Interface, Includes LabVIEW Drivers
  • CW and QCW Modes of Operation

Price and Delivery Quote

Buy Now / Add to Cart

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).

Technical Questions for this Product


Customers Also Considered:

Why do Scientists & Engineers Choose Laser Lab Source?

PRICE $1995.00
  • Current Output Range: 0.00 - 20.00 Amps
  • Compliance Voltage Range: 0.00 - 6.00 Volts
  • Current Noise and Ripple (rms): < 10 mA
  • Current Setpoint Resolution: 5 mA
  • Current Stability (4 hours): ≤ 300 ppm
  • Current Limit Setpoint Accuracy: ± 2%
  • Programmable Soft-Start Current Ramp to Set Point (300ms Default)
  • Independent Pilot Laser Output (5V, 150mA max)
  • 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
  • Minimum QCW Rise and Fall Time: 2μs (< 1μs on request)
  • QCW Pulse Width: User Adjustable 2μs to CW, 10%-90% (< 1μs on request)
  • External Modulation Input Voltage Range: 0 ~ 4 Volts
  • Modulation Bandwidth: 25 kHz
  • Modulation Input: BNC, Digital (TTL) or Analog, 10kΩ Impedance
  • QCW Trigger: Internal Pulse Generator or External
  • ---------------------------------------------------------------------------------------------
  • Modulation Input Voltage Range: 0 ~ 4 Volts (4V = Max Current)
  • Analog Modulation Bandwidth: 1 Hz – 20 kHz
  • Laser-On External LED Indicator: 5mA Output
  • Pilot Laser Anode, vs. GND
  • Temperature Sensor Input: 10kΩ NTC Thermistor
  • External Fan Control Circuit, 1 - 24V, 300mA (max)
  • Photodiode Input, Measurement Range: 0.00 - 700 μA
  • Photodiode Current Measurement Accuracy: ± 0.5%
USER INTERFACE and connectors
  • Front Panel: Alphanumeric LCD with Key Pad
  • RS232 Standard
  • USB Option Included
  • LabView Drivers Included
  • Laser and Peltier Connector: SubD-15, Female
  • RS-232 Connector: SubD-9, Female
  • Safety Interlock: Jack Connector, Stereo 3.5mm
  • Power Input: Universal 100V ~ 240 VAC, 50/60 Hz
  • Dimensions: 85mm (H) x 105mm (W) x 200mm (L)
Recommended Accessories
  • kab-39 Unterminated Connecting Cable -or-
    kab-231 Terminated Connecting Cable

Product Overview:

Precision 20 Amp Laser Diode Driver

The LDI-187 series driver is a precision current source which offers up to 20 amps and 6 volts of power to bias your laser diode. They have industry leading protection features to make sure that your high power device is not damaged by AC line power surges, over-current, reverse transients and multiple other potential sources of harm to the laser. This model includes an RS-232 digital interface and USB interface. In addition to the continuous wave (CW) DC current mode of operation, the LDI-187 also includes a Quasi-CW mode with a built-in function generator that can deliver pulses from 25 µs to CW. These drivers are designed with multi-stage filtering to deliver low noise, high stability current to the laser diode.

Designed to Safely Bias Pump Laser Diodes

These laser diode drivers were designed specifically for fiber coupled and free-space pump laser diodes from companies such as LUMICS, Lumentum and II-VI. It has a fast feedback analog control loop which detects open circuit conditions and immediately shorts the drive current. The user can set the current soft-start ramp time period or can use the default factory setting of 300 milliseconds. The user programmable soft-start current ramp is designed to allow the user to optimize the ramp time to avoid thermal shock to the laser. Thermal shock can result from quickly ramping the drive current and the subsequent heat generation which occurs before the temperature of the device under test can be stabilized.

Includes Internal Function Generator for QCW

The internal function generator on the LDI-187 provides the user with the flexibility to run the laser in multiple modes such as "hard-pulse" or microsecond pulsing QCW mode. It has a BNC input on the rear panel which allows the user to apply an analog or digital modulation signal which can be used to dither the drive current. Also, sequencing software is available to allow the user to set a string of desired current set-points: the unit auto-sequences through a pre-set range of current points for the pre-set dwell times for each point. Compatible heat sink options with interface cables are available for most fiber coupled laser package styles. Inquire for details.

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