Oliver H. Heckl "Frequency combs and mirrors"

New channel Fundacja Candela: title sample judged 'whole' (Nearly all uploads are full technical conference-style talks by physicists on precision spectroscopy and laser physics, ); passed a second screen for sellers/exam-prep/re-uploads; 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.