5.
WAVE MODE:
This option allows the user to independently set periodic waveform control
signals for 4 channels of the polarization controller. This gives the user the
flexibility to switch back and forth between two SOPs (square wave on one
channel), to set up a constant-rate SOP variation (triangle wave on one channel)
or to use multiple channels to implement a more complicated variation pattern.
Applying a sine wave to one channel sweeps out a ring (or portion thereof,
depending on the amplitude), sinusoidally in time, on the Poincaré sphere. Figure
10-13 show examples of this for each of the 4 channels individually. Figure 10 is
the trace for a sine wave with amplitude 60V and frequency 5 Hz applied to
channel 1. Figure 11 is the same sine wave applied to channel 2. Figure 12 and 13
show the trace for a sine wave with amplitude 30V and frequency 5 Hz applied to
channels 3 and 4, respectively. Since V
π
is about 30V, the first two traces sweep
out close to a full ring, while the last two sweep out about half a ring.
Figure 10 Sine wave with A=60V, f=5Hz on channel 1
Figure 11 Sine wave with A=60V, f=5Hz
on channel 2
Figure 12 Sine wave with A=30V, f=5Hz on channel 3
Figure 13 Sine wave with A=30V, f=5Hz
on channel 4
Document #: GP-UM-PMD-1000-21
Page 34 of 122
