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Combined Laser Diode & Tec Controllers - Krona Electronics
KRONA Electronics

Combined Laser Diode & Tec Controllers

For applications that require both temperature and laser diode control, we offer two approaches: integrated laser diode and TEC controller (a single unit drives both) and combinations of one laser diode controller and one TEC controller. This makes use of what we call the “passthrough” capability of our TEC controller. Our integrated controllers are:

  • Vue-DPSS Series. This controller integrates a laser diode current driver with two TEC controllers. Up to 3A at 3.4V with extremely low RMS current noise levels for the diode driver. Available as a turn-key Developer Kit with control & analysis software, or as PCB-only for system integration & OEMs.
  • Vue-HCT Series. This controller integrates a high current laser diode driver with a TEC controller onto a single PCB. Up to 50A at 3V for the laser diode driver. Available as a turn-key Developer Kit with control & analysis software, or as PCB-only for system integration & OEMs.

For applications that require temperature but not laser diode control, we offer the Vue-TEC Series.

For applications that require laser diode control but not temperature control, we offer single channel current sources for controlling one laser diode or multiple laser diodes in series. These are the Vue-LV Series and the Vue-MV Series.

Category:

Selection Guide

If your application requires both laser diode drive current and precise temperature regulation through a thermoelectric — or Peltier effect — cooler (TEC), we offer two general approaches. In the integrated approach a single unit provides both laser drive and the TEC control. In the combined approach the TEC controller and the laser diode controller are separate units. They can be interfaced individually or as a single functional unit using our TEC controller’s “passthrough” feature. Any combination of Vue-TEC controller and single-channel laser diode controller (Vue-LV or Vue-MV) can be used in this way.

When the integrated approach is available it is generally preferable. In order to evaluate this possibility you must consider the following parameters:

  • The maximum intended operating current for the laser diode, keeping in mind possible degradation due to aging of the laser.
  • The maximum voltage drop expected for the laser diode, which is the sum of the diode operating voltage and the ohmic loss in the cables and connectors.
  • The maximum voltage of your TEC.

In most cases there is a range of TECs that will meet the cooling requirements of your system. Selecting one that matches the capability of one of our standard drivers will significantly simplify the control task.

When no integrated solution is available, the laser diode driver and the TEC driver can be chosen separately based on their separate characteristics. See the TEC controller selection guide and the single-channel laser diode controller selection guide for more information.

Our laser diode controllers are current sources. You command a specific current, and the voltage that results is a characteristic of the load (the diode plus cables and connectors) rather than the driver. The driver shuts off to protect itself when the output voltage drawn exceeds its capabilities. The limit at which this occurs is termed the compliance voltage.

Each product line is optimized for a different range of applications. The Vue-DPSS drives a single laser diode and two TECs. The Vue-HCT is for a higher current diode and one TEC.

The Vue-HCT is designed for high current loads and therefore becomes noisy at low current. For this reason it specifies a minimum current of 5A, and its firmware will prevent the laser diode driver from turning on below this point. If your requirements include operation under these conditions please contact us.

Our Vue-TEC drive units incorporate advanced control logic that will servo the temperature to a user-defined set point. The driver controls the voltage applied to the TEC, and the current that results is a characteristic of the TEC rather than the driver. In the event that the TEC tries to draw more current than the driver can provide, a shutoff will occur to protect the driver. When this occurs the laser will be automatically shut off as well.

ProductCurrent max (A)Voltage max (V)TEC Current (A)TEC Voltage (V)
Vue-DPSS-3.03.03.52.54.0
2.54.0
Vue-HCT50.03.015.011.5

Features

The key features of our designs are microprocessor control, switch-mode power conversion, and advanced circuits that help protect laser diodes and TECs against power-supply related failures. The result: small footprints, high electrical efficiency, rich feature sets, ease of interfacing — the highest possible value whatever the application.

Feature / Link
Description

WinVue is our standard Windows interface program for our combined laser diode and TEC controllers, and is included in our Developer Kits. It has a slightly different configuration for each product, accessing all the features of the controllers through a familiar GUI environment.

Using our Autostart feature, all of our controllers are capable of stand-alone operation without an attached PC (although WinVue will simplify the setup and configuration of Autostart).

The Vue-DPSS and Vue-HCT Controllers protect your laser diodes and TECs by diagnosing and reporting an extensive list of fault conditions.

Software Interface

There are two methods of interfacing externally with a Vue controller: WinVue software or serial commands.

Interface / Link
Description

WinVue is our standard Windows interface program for our combined laser diode and TEC controllers, and is included in our Developer Kits. It has a slightly different configuration for each product, accessing all the features of the controllers through a familiar GUI environment.

Serial commands
There is a comprehensive list of serial commands available for each Vue controller. Contact Krona for more details.

Datasheets

Datasheet / Link
Description

Datasheet for Vue-DPSS System Controller. This controller combines a laser diode driver and two TEC drivers on a single PCB.

Datasheet for Vue-HCT High Current Diode & TEC Controller. This controller combines a high current laser diode driver with a TEC driver on a single PCB.