We proposed a new kind of cascade Y-branch splitter with a branching region and a fan-out region. The length of the new device are analyzed in detail and compared with ordinary ones. The results show that the new splitter can be 10%-30% shorter than the ordinary splitters. We designed and fabricated a 1*16 splitter in K+/Na+ ion-exchanged BK7 glass. The length of the new designed splitter is 30-mm, which is 85% of the length of an ordinary splitter.