In our internal experiment, we use several crystals in different length to implement ultrashort pulse SHG. The pump laser is ~100fs, 100MHz and up to 330mW average power centered at 1560nm. There is a built-in SHG port of the laser which use a 0.5mm long conventional type-0 PPLN, and all of the measurements are compared to this SHG port. When using a 5mm long PPLN in type-I phase-matching configuration, >45% conversion efficiency compatible to the SHG port are obtained. The efficiency is even improved up to 67% when we replace to the 10mm long PPLN, and >220mW optical power at 780nm was successfully obtained.