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We are using the WLD3343 with a C-mount 2 W 808 nm diode, and questions about how to handle the laser and controller. What handling precautions do you recommend? And what should we be concerned about when we’re configuring the driver with the laser?

Also, we want to make sure we’re minimizing current noise to the laser. Do you have any recommendations for noise and transient suppression filters?

What is the best way to minimize electrical noise in the driver output current when using the WLD3343 Laser Driver?

Can the WLD3343 laser diode driver be externally modulated with an analog signal, if so what would be the bandwidth?

What sensor would you recommend to be used with the WTC3243 temp controller: an AD590 temp transducer or a thermistor? Would a larger mass increase the stability?

Battery power for Laser Drivers and Temperature Controllers – can the laser diode driver and temperature controller be powered by batteries directly?

Do the temperature controllers always provide full current to the driven element (a TEC or Peltier device, or resistive heater) when the actual temperature does not equal the set point temperature?

Do you have a chart indicating the relationship between the resistance of the setpoint and the current of the thermoelectric?

How do you determine where the “load lines” will be and calculate their positions on SOA charts?

Using the LFI3751, we fail to get any output voltage. On start-up its temperature display is flashing although no other LED is flashing simultaneously (none of the four red error LEDs). While flashing it appears to show the temperature correctly. When we try to enable the output, the instrument gives a long tone, but fails to reset and to output a voltage.

Can I use an MPT to control a resistive heater?

Can I use two PLD10000 or PLD10K-CH laser driver modules connected in parallel to feed a single laser diode (or diodes) to achieve up to 20 Amps of drive current?

What are the dimensions of your thermistors?

What is the thickness of the plastic on the Wxx products’ case (WLD3343 Laser Driver, WTC3243 Temperature Controller or WHY5640 Temperature Controller) and what is the thermal conductivity of the plastic case?

What is the thickness of the plastic on the WTC3243 case and what is its (the plastic case’s) thermal conductivity?

I have a temperature controller and laser diode driver that have been discontinued. They are designed into a system that we still use but appear to not be functioning correctly. Do you offer repair or calibration services for discontinued items?

I am looking for a temperature controller so that I can maintain a constant 37°C in a petri dish. This application would require internal immersion heaters.

We are building a prototype laser cooling system that needs to control the temperature of two thermoelectric coolers (Melcor part: CP1.4-127-10L) connected in series. Each TEC has the following operating specifications:

Qmax = 33.4 Watts
Delta Tmax = 68°C
Imax = 3.9 Amps
Vmax = 15.40 Volts
Module Resistance = 3.44 Ohms

Will the HTC3000, 3.0 Amp product and its evaluation board be a suitable controller for this application since the TECs won’t really be driven too hard (except maybe at start-up)?

Would a 24 V power supply be sufficient to drive these TECs if they were connected in series?

The Wavelength Electronics WLD3343 datasheet specifies the constant current control short term stability (1 hour) and long term stability (24 hours) each at 25°C. I would like to know the dependence of the laser/light regarding the temperature. What happens, when we use the WLD3343 at -50°C or +110°C for example, because the device is specified for -65°C to 150°C.

Is it possible to have access to the potentiometer of the MPT5000 (temperature setpoint adjust, p-gain adjust) from the outside? We plan to use the MPT5000 for an integration in a laser controller for control with a front panel.

What is the highest output current temperature controller that Wavelength Electronics currently offers?

I have a question related to the use of the Analog Input of an MPT10000 temperature controller with an RTD. The sensor we are using is a PT100, with the sensor bias current set for 1 mA.

We want to change the set point temperature using an external voltage applied to the Analog Input (Pin 6 on the MPT Series Temperature Controllers). We would like to set the set point to 20°C, and apply an analog input that will change the set point up to 40°C or down to 0°C.

Is it possible to apply a negative voltage to the Analog Input (pin 5) on the MPT Series Controllers?

On the MPT, is the analog ground (Pin 5) internally connected to the power supply ground (pins 14 & 15)?

We operate a WLD3343 and a WTC3243 together from one power supply and want to build this in series and need to specify the power supply:

  1. What stability of the power supply is necessary, what ripple is allowed?
  2. Do you have any kind of overload protection?
  3. Would it do any harm to have a capacitor (i.e. 470 pF) in parallel to the laser diode?

I have a MPT10000 and am wondering about the proportional gain: the potentiometer turns endlessly, there is no left or right stop, I want to know how to obtain a value of the set gain, is there a way of getting a 0-5 V readout?