{"id":3799,"date":"2025-11-01T11:14:55","date_gmt":"2025-11-01T10:14:55","guid":{"rendered":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=3799"},"modified":"2025-11-06T13:58:35","modified_gmt":"2025-11-06T12:58:35","slug":"femtometre-fm-femto-lases-piezosystem-jena-ent-40-20-env-40-csg","status":"publish","type":"post","link":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=3799","title":{"rendered":"Femtom\u00e8tre\u00a0\u00bb FM FEMTO LASERS\u00a0\u00bb Piezosystem Jena ENT 40\/20 ENV 40 CSG"},"content":{"rendered":"

Femtometer\u00a0 (autocorr\u00e9lateur few-cycle) FEMTO LASERS Piezosystem Jena ENT 40\/20<\/strong><\/h1>\n

Principe :<\/strong> c\u2019est un autocorr\u00e9lateur interf\u00e9rentiel (type Michelson)<\/strong> pour caract\u00e9riser des impulsions ultracourtes (femtosecondes \u2014 10\u207b\u00b9\u2075 s). L\u2019appareil \u00ab Femtometer \u00bb r\u00e9alise une mesure interf\u00e9rentielle de l\u2019impulsion (combinaison d\u2019un interf\u00e9rom\u00e8tre compact + d\u00e9tection spectrale + logiciel) pour acc\u00e9der non seulement \u00e0 la dur\u00e9e d\u2019impulsion mais aussi \u00e0 l\u2019\u00e9chelle temporelle de la p\u00e9riode optique (mesures de pulses \u00ab few-cycle \u00bb). En pratique on scinde l\u2019impulsion, on fait varier le d\u00e9lai relatif, on recombine et on analyse le signal (interf\u00e9rence \/ corr\u00e9lation) pour reconstruire la forme temporelle\/spectrale. spectra-physics.com<\/span>+1<\/span><\/span><\/span><\/a><\/span><\/span><\/h3>\n

Usage typique :<\/strong> caract\u00e9risation d\u2019impulsions femtosecondes en laboratoire (dur\u00e9e, forme, stabilit\u00e9 de phase).<\/h3>\n<\/div><\/section><\/div>\n
<\/div><\/div><\/div><\/div><\/p>\n
<\/div><\/div><\/div><\/div>\n
<\/div><\/div><\/div><\/div>\n

Principe g\u00e9n\u00e9ral (piezo + \u00e9lectronique) :<\/strong><\/p>\n