Necessary Manuals
Operating Manual: EOM Operating Manual_ED0_43.pdf
Specifications: NIR-MX950-LN-20.pdf
Necessary Information to Keep in Mind While Working
14 dBm power corresponds to 25.12 mW power coming from the LASER light.
Modulation of the LASER light
When writing the post, we used TOPTICA CTL as the excitation source. We used the following specifications of the light that was used for modulation:
Operating wavelength: 920 nm
Set Current: 137 mA
LASER power read by the power meter: 4.273 mW
At first, we shall make some DC measurements of the modulator.
LASER power at 0V: 0.89 mW
at 14.920V: 2.268 mW
at 6.130V: 8.96 uW
Efficiency of the EOM at the optimal point (14.920 V) is 2.268/4.273 = 0.54
Extinction ratio = 2.268/0.00896 = 253.125
*** So far, all the data points have been highly affected by drift over time. The points shown here are taken after a ‘long enough’ time after the power meter reading was stable. The next plan is to capture this trend of drifting at different operating voltages. More stable readings can be acquired in a stable temperature condition.