Toptica FemtoFiber pro IR, Manual, Page: 91 / 108

6. Appendix
Page 87
Status: 6.9.18
6.9 FemtoFiber
®
pro Operation via Software Commands
6.9.1 Basic Operation
The FemtoFiber
®
pro firmware offers a very flexible and powerful language for controlling the laser with
all his features. However, for basic operation a small subset of the commands is sufficient:
Switching ON and OFF
The fiber oscillator for seeding the amplifier stages is started already during system initialization, immedi-
ately after powering up the electronics. During normal operation there is no need to switch OFF the oscil-
lator again, since no laser light will be emitted as long as the amplifier stages are switched OFF.
For turning ON and OFF the emission therefore the amplifiers have to be switched ON by the following
commands:
ffpro.arm0.off() (command, 0 parameters, no result value)
switch OFF emission
ffpro.arm0.on() (command, 0 parameters, no result value)
switch ON emission
In a Multi-Arm System the additional amplifiers can be accessed in a similar way by simply replacing
“arm0” with “arm1”, “arm2” or “arm3”, respectively.
For querying the emission status the following property can be used:
ffpro.arm0.onoff (integer property)
on/off flag:
_ 1 = emission ON (oscillator and all amplifiers of arm0 are on)
_ 0 = no emission
6.9.2 Tuning the internal Pulse Compressor
Before being emitted at one of the FemtoFiber
®
pro apertures, the amplified pulses can be manipulated
by the built-in pulse compressor in order to exhibit the phase distribution best suited for the user's needs.
The pulse compressor consists of a set of two highly dispersive prism, one of which can be moved by a
motor in order to adjust the amount of dispersion applied to the pulses. The motor for the prism can easily
be accessed by the user with the following commands. All positions of the prism stage are entered in µm,
relative to a fixed position (reference position).
In order to query the current prism position use the following property:
ffpro.arm0.axSi.pos (floating point property, read-only)
current motor position in µm
In a Multi-Arm System the additional amplifiers can be accessed in a similar way by simply replacing
“arm0” with “arm1”, “arm2” or “arm3”, respectively.
Example:
>>> ffpro.arm0.axSi.pos
31248.3
>>>