D2-105 Laser Controller
- Lowest noise current source commercially available
- Two-stage PID temperature control
- High-speed servo and RF inputs
- Current limit and safe turn-on
The D2-105 is a precision diode-laser current source based on the Libbrecht-Hall* circuit. With a current noise density <100 pA / √Hz, the D2-105 has lower noise than any other commercially available laser controller. This ultra-low current noise is ideally suited for precision spectroscopy and metrology applications. Furthermore two-stages of temperature control provide sub-mK stability, ensuring long term frequency stability.
A front panel current servo BNC enables high-speed (>10 MHz) servo control of the laser’s frequency. Additionally, extremely high speed modulation is enabled by a front panel RF port, which is connected directly to the laser current output SMA. This enables the user to directly write sidebands onto the laser via injection current, which can save the use of expensive AOMs and EOMs. To keep 60 Hz hamonics off the output current the D2-105 is powered with either an external power supply (D2-005) or user provided power via a breakout board (D2-001).
*Libbrecht and Hall, A Low-Noise, High-Speed Current Controller, Rev. Sci. Inst. 64, pp. 2133-2135 (1993).
The D2-105 is designed to integrate into our Rackless Rack. As such, it may be powered with our D2-005 or from an adjacent D2 electronics module. If used as a stand-alone product it may be powered with either a D2-005 or from a user supplied power supply via a breakout board.
| D2-105 | D2-105-500 | Units | |
|---|---|---|---|
| Current Source | |||
| Current Range | 0-200 | 0-500 | mA |
| Current Noise Density | <100 | <200 | pA / √ Hz |
| RMS Noise (10Hz – 100 kHz) | <50 | <100 | nA |
| RMS Noise (10Hz – 1 MHz) | <100 | <150 | nA |
| RMS Noise (10Hz – 10MHz) | < 300 | < 500 | nA |
| Monitor Resolution (Display) | 0.1 | 1 | mA |
| Absolute Accuracy | 2 | 2 | % |
| Temperature Coefficient | <1 | <5 | μA / oC |
| Current Servo Input | |||
| Input Impedance | 1000 | 1000 | Ω |
| Bandwidth | >10 | >10 | MHz |
| Modulation Coefficient | 1 | 1 | mA / V |
| RF Input Bandwidth | 0.5 to >3000 | 0.5 to > 3000 | MHz |
| Temperature Servo Input | |||
| Input Impedance | 100 | 100 | kΩ |
| Temp. Modulation Coefficient | |||
| Gain = Low | -20 | -20 | mK / V |
| Gain = High | -600 | -600 | mK / V |
| Temperature Control | |||
| Temperature Setpoint Range | 1 to 50 | 1 to 50 | oC |
| Long Term Stability (T2) | mK / day | ||
| Max. TEC Current (Voltage) | 1 (4) | 1 (4) | A (V) |