The variable specifies the value of the penalty factor for the
integrated field strength (fluence). Large value = small fluence.
A transient shape can be specified using the block OCTLaserEnvelope.
In this case OCTPenalty is multiplied with time-dependent function.
The value depends on the coupling between the states. A good start might be a
value from 0.1 (strong fields) to 10 (weak fields).
Note that if there are several control functions, one can specify this
variable as a one-line code, each column being the penalty factor for each
of the control functions. Make sure that the number of columns is equal to the
number of control functions. If it is not a block, all control functions will
have the same penalty factor.