Compare Model Drawings, CAD & Specs Availability Price
3700
Temperature Controller, Thermoelectric, ±14A, ±24V, 336W, USB, High Power
$7,720
6 Weeks
 3700 Temperature Controller, Thermoelectric, ±14A, ±24V, 336W, USB, High Power
6 Weeks
 $7,720

Specifications

  • TE Current Range
    -14.0 to +14.0 A
  • TE Voltage Range
    -24 to + 24 V
  • TE Output Power
    336 W
  • Temperature Range
    -100 to + 250 °C
  • TE Current Accuracy
    ± 0.3%
  • TE Current Limit Accuracy
    ± 0.3 % FS
  • TEC Noise/Ripple
    <1 mA
  • TEC Output 1 h Stability
    0.0009 °C
  • TEC Output 24 h Stability
    0.0019 °C
  • Connector Type
    7-pin, female D-Sub 7W2
  • Computer Interfaces
    USB
  • Display Type
    4-line by 20 character alphanumerical, and seven segment display
  • Display Range Resistance (10 µA)
    0.01 to 250.00 kΩ
  • Display Range Resistance (100 µA)
    0.001 to 25.000 kΩ
  • Operating Temperature
    0 to 40 °C
  • Power Requirements
    100-240 VAC, 50/60 Hz universal input

Features

1 Hour Temperature Stability

One hour temperature stability measurements performed in a typical lab environment, on a Newport laser Mount 764H-110 with an Oclaro BW-series laser running at 10W optical output power. Ambient temperature variations during the test period of the order of 2 °C is shown. The Laser mount temperature was set at 21 °C for the entire test over a 1 hour period and was held stable at 21 °C with a variation of ± 0.0004 °C over the 1 hour period.

24 Hour Temperature Stability

24 hour temperature stability measurements were performed in a typical lab environment, on a Newport Laser Mount 764H-110 with an Oclaro BW-series laser running at 10W optical output power. The graph displays ambient temperature variations during the test period of the order of 3 °C. The laser mount temperature was set to 21 °C with a variation of ± 0.00077 °C over the 24 hour period.

Advanced PID Control

PID control is implemented in the Model 3700 that meets all the temperature stabilization requirements for laser diode users. During operation, the front panel controls can be disabled to prevent any changes in the output by accidental misadjustment of the control knob. Protection features include: ITE Limit, Hi and Lo Temperature Limits, Voltage Limits, Sensor Open and TE Open Detection. To prevent noise pickup, either by the output lines or the sensor inputs — resulting in undesirable temperature oscillations — shielded cables are also available.

Full Current Output Across Compliance Voltage Range

Innovative hardware and firmware design allows 3700 to output 14 A over the full 0-24 V compliance range. Compare this with our competitors’ controllers output capability shown.

Multiple Supported Temperature Sensors

All standard temperature sensors including thermistors, platinum RTD, AD590/592 and LM335 IC sensors are supported without the need for additional interface units. Sensor calibration constants are easily programmed for direct readout in ° C.

4 Line x 20 Character LCD Display

All pertinent TE cooler parameters ITE, VTE, temperature sensor (° C, R, Amp, or Volts) are measured and simultaneously presented on the four line alphanumeric LCD display.

Maintain Laser Diode Threshold Current and Wavelength

The above figure figure shows that the threshold current and differential responsivity of a laser diode are strongly affected by the laser’s temperature. The laser threshold will increase exponentially with temperature as exp(T/T0), where T is the laser temperature and T0 is the “characteristic temperature” of the laser (typically between 60 to 150°C). T0 is a measure of the temperature sensitivity of the device with higher values implying that the device is more thermally stable. T0 is an important laser diode characteristic and is commonly extracted from multiple L-I curves. Changes in temperature also affect the bandgap of the semiconductor junction and therefore, the peak wavelength of the gain profile. This results in a linear relationship between temperature and the center wavelength of the laser diode (see above figure) with typical temperature tuning coefficients of 0.3 nm/°C. As a result, a temperature controller plays a key role in determining the laser wavelength. Please see Fundamentals of Laser Diode Control for additional information.

Resources