Frequency doubled femtosecond Ti:sapphire laser with an assisted enhancement cavity
Zhang Jin-Wei, Han Hai-Nian†, , Hou Lei, Zhang Long, Yu Zi-Jiao, Li De-Hua, Wei Zhi-Yi‡,
       

Spectra of (a) input laser centered at 826 nm and (b) SHG output at 413 nm.