Recent content by teen_physicist

No worries. Any support is welcomed!! In short term, I want to the PDH locking and get my laser linewidth narrow down to a couple kHz. In long term, I am planning to couple serval lasers into this cavity to do the Rydberg excitation, which requires narrow linewidth for higher order energy levels.

Ideally, I don’t think this behavior should appear, even for a very narrow bandwidth oscilliscope. The issue is also present in the PDH error signal itself, where a similar irregular structure is visible and clearly degrades the locking performance. The cavity is mounted on an air-floated...

Thanks!!!

I am observing an irregular, aperiodic noise pattern in the reflection signal of a high-finesse optical cavity (finesse ≈ 20,000). The cavity is normally operated using a standard Pound–Drever–Hall (PDH) locking configuration, where an EOM provides phase modulation. The signals shown in the...