C O M M A N D R E F E R E N C E
GPIB Command Reference
42
LDC-3926339
C H A P T E R
4
Action
Requests the instrument to identify itself.
Response
Returns a comma delimited standard format ASCII identification string, from information stored in
the instrument during manufacture.
The LASER: command path is used to access the LDC-3926339 current source commands. The
following command paths may be reached from the LASER: command path:
LASER:CAL:
LASER:ENABle:
LASER:LIMit:
LASER:MODE:
LASER:SET:
The following commands may be reached directly from the LASER: command path.
The LASER:BIAS command turns the laser photodiode bias on or off.
Parameters
An <nrf value>; 1 = on, 0 = off.
Notes
When the BIAS is on, a bias of ñ5 V is placed across the photodiode terminals.
Examples
LASER:BIAS ON-action: sets LASER photodiode bias output on.
The LASER:BIAS? query returns the status of the photodiode bias selection.
Parameters
None. The response is an <nrf value>.
Notes
Photodiode bias is turned off when a *RST command is issued.
Examples
LASER:BIAS?-response: 0, means that the laser photodiode bias is off.
The LASER:CALPD command sets the laser photodiode feedback responsivity (the CAL PD
parameter).
Parameters
An <nrf value>, in microamps/milliwatt (
µ
A/mW).
Notes
The module calculates optical power by dividing the monitor feedback current by its CalPD value.
Photodiode (PD) responsivity is frequently provided by manufacturers of packaged lasers with built-
*IDN?
LASER:
LASER:BIAS
LASER:LDI
LASER:MDP?
LASER:SYNCLDV?
LASER:BIAS?
LASER:LDI?
LASER:MODE?
LASER:SYNCMDI?
LASER:CALPD
LASER:INC
LASER:MODulation
LASER:SYNCMDP?
LASER:CALPD?
LASER:LDV?
LASER:MODulation?
LASER:STEP
LASER:COND?
LASER:MDI
LASER:OUTput
LASER:STEP?
LASER:DEC
LASER:MDI?
LASER:OUTput?
LASER:TOL
LASER:EVEnt?
LASER:MDP
LASER:SYNCLDI?
LASER:TOL?
LASER:BIAS
LASER:BIAS?
LASER:CALPD
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