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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.

Newport LDC-3706 Series User Manual

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