ILX Lightwave TCM-39034: 4-CH TEC Module

The ILX Lightwave TCM-39034 is a 4-channel thermoelectric cooler (TEC) module engineered for precision temperature control of laser diodes, photodetectors, and temperature-sensitive optical components within the LDC-3900 Modular Laser Diode Controller. The module delivers stable thermal management across an extended range of -99.9°C to 199.9°C, maintaining short-term stability better than ±0.004°C over 1 hour and long-term stability better than ±0.01°C over 24 hours. Each channel operates as an isolated bipolar constant current source, enabling independent control without ground loop interference.

Technical Specifications Temperature Control

Control range: -99.9°C to 199.9°C

Setpoint resolution (thermistor, -20°C to 20°C): 0.1°C

Accuracy (thermistor, -20°C to 20°C): ±0.2°C

Resolution (thermistor, 20°C to 50°C): 0.2°C

Accuracy (thermistor, 20°C to 50°C): ±0.2°C

Setpoint resolution (AD590/LM335, -20°C to 50°C): 0.1°C

Accuracy (AD590/LM335, -20°C to 50°C): ±0.2°C

Short-term stability (1 hour): < ±0.004°C

Long-term stability (24 hours): 8 V

Current limit range: 0–4 A

Current limit accuracy: ±50 mA

Ripple/noise: < 1 mA rms

Isolation: Floating from all other modules and earth ground Sensor Support

Compatible sensors: NTC thermistor (2-wire), AD590, LM335, Pt100/100 Ω RTD

Thermistor sensing current: 10 µA or 100 µA

Usable thermistor range: 25–450,000 Ω

AD590 bias: 8 V; LM335 bias: 1 mA; RTD bias: 0.8 mA

AD590 output (25°C): 298.2 µA/K

LM335 output (25°C): 2.73 V; temperature coefficient: 10 mV/K

Control algorithm: Smart Integrator, Hybrid PI

Key Features

Four independent isolated TEC channels

High-resolution temperature measurement and control

Supports multiple sensor types with automatic calibration storage

Eliminates ground loops in multi-channel laser systems

GPIB/IEEE-488.2 remote control and TEC voltage calibration capability

Typical Applications

Multi-channel laser diode temperature stabilization

Photodetector thermal management

Wavelength and power stabilization in optical systems

Automated test and characterization of temperature-dependent devices

Compatibility & Integration The TCM-39034 mounts in one of four rear-loading bays within the LDC-3900 mainframe. Module calibration data is stored internally and retained during system reconfigurations. Full compatibility with GPIB interfaces enables remote operation and automated control of all TEC functions.