High precision injection current driver and temperature controller for TEC-cooled diode modules, such as SLDs and LDs
CTC-series SLD/LD controllers
A CTC series controller combines a high precision injection current driver and a temperature controller within a single unit. The CTC controllers are specifically designed to supply power to TEC-cooled diode modules, such as SLDs and LDs. The advantage of using CTC controllers is that the device under test (DUT) is not permanently assembled with the controller, allowing different DUTs to be easily replaced on the supplementary mount.
CTC controllers provide more advanced control of driving parameters than ready-to-use OEM light sources: in addition to controlling the injection current and current limiting, CTC controllers also allow control of the TEC temperature via the front panel console of the device.
CTC controllers have necessary protections built in, such as:
The injection current driver in use in CTC controllers was specifically optimized for low noise. CTC drivers operate in CW; they can be factory preset to Constant Current [CC] mode (default factory setting, if not specified otherwise), or to Constant Power [CP] mode (on request). CTC controllers are AC powered units.
CTC series controllers are the ideal choice for laboratory applications, and for functional inspections of TEC-cooled fiber-pigtailed and free-space modules.
The front panel controls and LCD display provide an easy-to-use interface for operating the controller and accessing all its features.
A CTC-series SLD/LD controller is shown in the picture.
CTC-series SLD/LD controllers
CTC-series SLD/LD controllers
CTC-series SLD/LD controllers
Key specifications for CTC-series SLD/LD current and temperature controllers are summarised in the table below.
| Drive current control | |
|---|---|
| Number of channels | Single (the 8-channel model is available on request – please contact us to obtain more detailed information) |
| Mode of current control | Constant Current [CC] or Constant Power [CP] upon request |
| Mode of operation | CW |
| Injection current range, mA | 10 to 1000 |
| Injection current setpoint resolution, mA | 0.1 |
| Injection current setpoint accuracy, % | ±0.05 |
| Current limit, mA | 500 or 1000 |
| Current limit resolution, mA | 0.1 |
| Compliance voltage, V | 1 to 4 |
| Long-term stability (24h, +25 °C), mA | < 25 |
| Thermal drift, ppm/°C | < 250 |
| RIN (beyond 1/f, 10kHz to 2MHz range), dB/Hz | < −130 |
| PD monitor reverse bias, V | 5 |
| PD monitor current range, mA | 0.05 to 20 |
| Temperature control | |
| TEC current range, A | −1.8 to +1.8 |
| TEC voltage range, V | −4.5 to +4.5 |
| Control range (thermistor input), kΩ | 1.2 to 20 (for |
| Setpoint resolution (thermistor input), Ω | 1 |
| Setpoint accuracy (thermistor input), Ω | ±10 |
| Long-term stability (24h, +25 °C environment), °C | < 0.1 |
| Power specifications | |
| Power | 100 to 240 V AC, 50/60 Hz |
| Fuse | 1 A |
| Mechanical specifications | |
| Connector for device under test | DB9-F |
| Dimensions (L × W × H), mm | 260 × 170 × 55 |
| Weight, kg | 1.3 |
CTC-series SLD/LD controllers
If you require more information, or you have custom requirements, please contact us at enquiries@sldsources.com.
CTC-series SLD/LD controllers