December 2019 84 LDC-3706 Series Laser Controller
SOURce[1]:FUNCtion[:MODE] <string> LAS TEC
SOURce[1]:FUNCtion[:MODE]?
Description Sets/reports laser driver operating mode in laser driver mode or TEC operating mode in TEC controller mode.
Parameters String representing operation mode, see notes
Notes Acceptable strings for first parameter:
"POWer" (laser driver mode only)
"CURRent"
"TEMPerature" (TEC controller mode only)
"RESistance" (TEC controller mode only)
Reset Value Laser: CURR TEC: TEMP
Example SOUR:FUNC POW; Sets the laser driver to power mode.
SOURce[1]:POWer:LIMit <nrf> LAS
SOURce[1]:POWer:LIMit?
Description Sets/reports laser driver photodiode power limit.
Parameters Power limit in Watts.
Note Maximum value depends on responsivity: limited by maximum IPD of 5 mA for the LDC-3726 and 10 mA for the
LDC-3736 & LDC-37620.
See Calculate:Transform:Power:Responsivity command.
Example SOUR:POW:LIM 0.001; Sets the photodiode power limit to 1mW.
SOURce[1]:POWer[:LEVel][:IMMediate] <nrf> LAS
SOURce[1]:POWer[:LEVel][:IMMediate]?
Description Sets/reports laser driver photodiode power setpoint.
Parameters Power setpoint in Watts. Maximum value depends on responsivity.
Reset Value 0.0 Watts
Example SOUR:POW 0.1; Sets the photodiode power setpoint to 0.1W.
SOURce[1]:RESistance:LCONstants:DERivative <nrf> TEC
SOURce[1]:RESistance:LCONstants:DERivative?
Description Sets/reports derivative term for TEC controller PID loop in sensor mode.
See Chapter 2 for a summary of PID control.
Parameters 0.000000 – 10.000000 – Derivative value setting
Reset Value 0.05
Example SOUR:RES:LCON:DER 0.05; Sets the derivative term for resistance to 0.05.
SOURce[1]:RESistance:LCONstants:INTegral <nrf> TEC
SOURce[1]:RESistance:LCONstants:INTegral?
Description Sets/reports integral term for TEC controller PID loop in sensor mode.
See Chapter 2 for a summary of PID control.
Parameters 0.000000 – 10.000000 – Integral value setting
Reset Value 0.1
Example SOUR:RES:LCON:INT 0.1; Sets the integral term for resistance to 0.1.
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