Product Brief


  • Five channels of independently programmable current sources
  • TEC driver for butterfly laser
  • TEC driver for butterfly case
  • Read-back for:
    • Laser section voltages
    • TEC current
    • Laser temperature
    • Case temperature
  • GUI for control
  • RS232 serial interface


The FP4516 Laser Controller is a stand-alone solution for open-loop drive of a multisection tunable laser. It has integrated sources providing five channels of independently programmable output current. It provides separate TEC control for laser and package and read-back of all laser section voltages, TEC currents, laser temperature and case temperature. A simple GUI for control over RS232 interface is included. Compatible with all of our tunable laser products.

Product Data Sheet


Gain Full Scale CurrentGFSI360mA
Phase Full Scale CurrentPFSI40mA
Front Mirror Full Scale CurrentFMFSI180mA
Back Mirror Full Scale CurrentBMFSI180mA
SOA Full Scale CurrentSOAFSI600mA
Current Setpoint Resolution (SOA) 19uA
Current Setpoint Resolution (Other)11uA
Minimum Compliance Voltage2.3V
Voltage Readback Resolution 804uV
Maximum TEC Driver Voltage Vtec Max5V
Maximum TEC Driver Current Itec Max1.5A
Temperature Setpoint Minimum0°C
Temperature Setpoint Maximum50°C
Temperature Setpoint Resolution 0.06°C
Temperature Readback Resolution 0.06°C
TEC Current Readback Resolution 1.6mA
Temperature Stability 0.01°C