4 ms·
For context, in wired chip-to-chip communication electronics, femtosecond variations are (statistically) measurable. Picoseconds are rather pedestrian. A 56 Gba
by k0stas 5y ago
For context, in wired chip-to-chip communication electronics, femtosecond variations are (statistically) measurable. Picoseconds are rather pedestrian. A 56 Gbaud signal has a single-symbol duration of about 18 picoseconds and perturbations on the order of 1 picosecond are rather large 5.6%.
Not to downplay the achievement of the article or the innovation in fusion physics and engineering in general, just a bit of context for the timescales.
- aDfbrtVt 5y agoFor further context, the fastest oscilioscopes commercially available (Keysight UXR) samples at 256G with 20fs (rms) of jitter. Modern coherent optics runs at over 100GBaud, a picosecond is 1/10th of a symbol period.
- jhallenworld 5y agoMSRP of $1.3 Million US dollars https://www.eevblog.com/forum/testgear/something-amazing!-keysight-uxr-110ghz-256gss-10-bit-scope-teardown-exp/ https://www.eevblog.com/forum/testgear/something-amazing!-ke...
- SAI_Peregrinus 5y agoAKA roughly one Brooklyn apartment.
- typon 5y agoUsed a similar scope during my grad school tenure for measuring 200GS/s ADCs. RF electronics is a wonderful field.
- lizknope 5y agoIn a 5nm semiconductor chip a standard cell inverter (like combinational AND / OR gates) can switch in 5 picoseconds. These things are characterized with at least 2 more significant digits so we feel we know how they respond at the 10's of femtosecond level of precision.