Volker Q.
I re-setup the OSA on the optical table and measured the modulation indices. This was done to ensure that the recent cleaning of the modulator crystal did not have any adverse effects on the performance of the modulation.
The previous measurements are described here. This time I only measured the modulation depth on the center frequencies.
The sideband height was measured with a OSA on the PSL table. The frequency is the modulation frequency in MHz. All three modulator inputs were driven with 10Vpp (in 50ohm).
Carrier: 220mV
| Frequency | SB (mV) | m | Frequency | SB (mV) | m | Frequency | SB (mV) | m | ||
| 9.10 | 12 | 0.47 | 24.1 | 1 | 0.13 | 45.5 | 6 | 0.33 |
The values look reasonable close to the previous set of measurements