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OPEN LOOP

INTERNAL PHASE SENSING: no fringe hopping. OPEN LOOP. OPEN LOOP. CLOSED LOOP (OPD + tip/tilt). INTERNAL PHASE SENSING: loop performance. OPEN LOOP. OPEN LOOP. CLOSED LOOP (OPD + tip/tilt). INTERNAL PHASE SENSING: loop performance. OPEN LOOP. OPEN LOOP. Not due to PZT.

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OPEN LOOP

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  1. INTERNAL PHASE SENSING: no fringe hopping OPEN LOOP OPEN LOOP CLOSED LOOP (OPD + tip/tilt)

  2. INTERNAL PHASE SENSING: loop performance OPEN LOOP OPEN LOOP CLOSED LOOP (OPD + tip/tilt)

  3. INTERNAL PHASE SENSING: loop performance OPEN LOOP OPEN LOOP Not due to PZT

  4. INTERNAL PHASE SENSING: left vs right output OPEN LOOP RIGHT OUTPUT LEFT OUTPUT

  5. INTERNAL PHASE SENSING: measurement noise OPEN LOOP • Measurement noise = 15 nm • Origin of the peaks? • Why not present in the FFT?

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