Extended-mirror Fryett Q optimizer#
Worker: not active · status: paused_success_q100k_resumable ·
checkpoint age: 28.9 min · accepted updates: 12 ·
candidate trials: 14
This frequency-free 16 µm campaign is forked from the preserved 8 µm cavity. Its outer five complete cells imply a 256.589 nm period; their registered two-dimensional median cell is repeated through the added mirror. It uses an adaptive replay-validated L-BFGS-B trust region. It is paused at this accepted landmark and remains exactly resumable for later binarization and smooth-boundary work.
quantity |
current |
|---|---|
design length |
16 µm |
inferred mirror period |
256.589 nm |
parent 8 µm Q |
6321.57 |
independent 4 ps seed audit Q |
42361.1 |
4 ps seed field / energy Q |
42361.1 / 42362.7 |
mirror splice |
x=3.85 µm in each half |
trusted Q |
138284 |
best trusted Q |
138284 |
progress to Q=100,000 |
138.284% |
field-fit Q |
138284 |
energy-fit Q |
139046 |
estimator ratio |
1.00551 (must be ≤1.25) |
pole wavelength |
820.137 nm |
source-center wavelength |
819.771 nm |
wavelength constraint |
off |
source-center updates |
2 |
normalized mode volume |
1.41469 (λ/n_target)³ |
objective |
11.8398 = log harmonic Q |
trust radius |
0.0189844 raw density |
L-BFGS memory |
10 / 10 pairs |
last candidate |
accepted |
fixed FDTD tape |
2.0 ps |
binarization / projection / filter |
off / off / off |
physical beta |
not measured |
Q and optimizer history#
The Q axis is linear. The plot stays zoomed to the achieved values so early progress remains visible; the 100,000 goal is annotated until it enters range. Only candidates whose field and energy lifetimes agree and whose smooth harmonic-Q objective increases can enter the accepted curve. Frequency is telemetry, not an acceptance constraint. Red trust markers are forward-only rejected trials.
Ringdown evidence#
There is no prescribed unity-amplitude ideal trace in this campaign. The orange curve is the fitted single pole in the actual source-off data, with the same observed normalization as the measured blue field. Absolute waveform MSE is retained as telemetry only and cannot trade Q away for amplitude or phase.
Geometry and field#
