C O M M A N D R E F E R E N C E
Command Reference
96
LDC-3700C Series
C H A P T E R
4
The LASer:MDP command sets the value of the optical power set point, in mW, if the
CALMD (CAL PD) responsivity is greater than 0.
Parameters
An <nrf value> which represents the photodiode feedback power, in mW.
Notes
If the CALMD (CAL PD) parameter is set to 0, the LAS:MDP value will not be used. In
this case, the measured MDP would be invalid, and the MDI (I
PD
) set point would be
used.
Examples
"Las:Mdp 40" -action: The LASER output is controlled so that the photodiode feedback
power remains constant at 40 mW.
"Laser:MDP 200" -action: The LASER output is controlled so that the photodiode
feedback power remains constant at 200 mW.
The LASer:MDP? query returns the value of the laser photodetector power
measurement, in mW.
Notes
The response is in mW. The response is valid, even when the unit is not in constant P
mode.
This measurement is updated approximately once every 600 msec.
Examples
"Las:Mode:MDP; Las:Calmd 460; Las:MDp?" -response: 100.0, means 100 mW of
photodetector power. This feedback is controlling the laser current output.
"LAS:MODE:IHBW; LAS:MDP?" -response: 20.0, means 20 mW of photodetector
power, but pho-todiode monitor current is not controlling the laser output current.
The LASer:MODE? query returns the selected laser control mode.
Notes
I
HBW
mode is the same as I mode (low bandwidth), except that the output low bandpass
filter is dis-abled in I
HBW
mode.
Examples
"LAS:MODE?" -response: ILBW, means that constant I (current) mode is in effect for the
laser output.
":Las:Mode?" -response: MDP, means that constant P (power) mode is in effect for the
laser output, and CALMD > 0.
"Las:Mode?" -response: MDI, means that constant P (power) mode is in effect for the
laser output,
"Laser:MODE?" -response: IHBW, means that constant I
HBW
(current, high bandwidth)
mode is in effect for the laser output.
LASer:MDP
C
OMMON
D
EVICE
D
EPENDENT
F
RONT
P
ANEL
LASer:MDP?
C
OMMON
D
EVICE
D
EPENDENT
F
RONT
P
ANEL
LASer:MODE?
C
OMMON
D
EVICE
D
EPENDENT
F
RONT
P
ANEL
Summary of Contents for LDC-3700C Series
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Page 10: ...L I S T O F TA B L E S viii LDC 3700C Series...
Page 78: ...RE M O T E O PE R A T I ON Command Syntax 62 LDC 3700C Series C H A P T E R 3...
Page 150: ...C O M M A N D RE F E R E N C E Command Reference 134 LDC 3700C Series C H A P T E R 4...