Precision Electro-Optic and Laser Technologies

SLICE-QTC Precision Four-Channel PID Temperature Controller

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New Application Note:


  • Four independent channels
  • Configurable PID loop filters
  • Sub-millikelvin stability
  • Touch screen control
  • Host GUI & API
  • 40 W of user-assignable control power
  • 6 A/channel
  • 18 V compliance
  • TEC or resistive heaters
  • External control of set point
  • Interlock other devices based on temperature controller fidelity


  • Diode & quantum cascade laser
  • Semiconductor amplifiers & tapered amplifiers
  • Photonic integrated circuits (PICs)
  • Nonlinear & photonic crystals
  • Optical cavities, gas cells, and interferometers

PID Temperature Control

Stability of the temperature of an active D2-100 laser controlled by the SLICE-QTC

The SLICE-QTC PID Temperature Controller features four independent precision temperature controller channels for TECs or heaters for temperature stabilization and control of lasers, semiconductor optical amplifiers, tapered amplifiers, optical cavities, PICs, and non-linear & photonic crystals.  The loops can be nested or control four separate systems.  With widely adjustable PID corners and gain, it is possible to stabilize the temperature of your plant with sub-millikelvin temperature stability and set point resolution. Download our application note on stabilizing large thermal loads to sub-millikelving stability.

Features like slew rate control and an output trigger allow you to trust your delicate photonic devices such as doubling crystals to the SLICE-QTC.  You can set a maximum rate of temperature change and have confidence it won’t be exceeded. Safeguard your laser diodes by automatically shutting down the current if the the temperature goes out of range.  Easily tune the PID temperature loop using the loop performance monitoring system.

The Vescent Photonics SLICEs of precision photonics control. Individually or working together, SLICE provides the performance you need on your benchtop, laser table, or in a rack.

SLICE-QTC in action:

ControlTouch screen & rotary knobs
Host GUI via USB 2.0
API via USB 2.0
Control Range(see note 2)
Capacity40 W total3
(20 W max per channel)
6 A/channel3
up to 18 V compliance4
Sensor TypeNTC thermistor5
Compatible PlantsTECs, Resistive Heaters
Stability6±0.2 mK over 10 minutes
Set Point Resolution<0.2 mK
Power Input100-240 VAC, 50-60 Hz
Slew Rate ControlYes
1All specifications subject to change without notice.
2Demonstrated -20 to +120°C. Broader temperature range is possible. Range limited largely by ability of plant design to remove heat and by thermistor nominal 10 kΩ reference temperature.
4Automatically set
5Nominally 10 kΩ at 25°C, but by selecting a thermistor that is 10 kΩ at another temperature, it is possible to improve precision at other temperature ranges.
6Plant-dependent. Specified for the D2-100 Laser.

Downloads, Manuals, & Firmware:

Related Information:

Application Note: Temperature Stabilization of a Large Thermal Plant