TY  - GEN
AU  - Zhang,S Y
AU  - Wu,J T
AU  - Zhang,Y L
AU  - Leng,J X
AU  - Yang,W P
AU  - Zhang,Z G
AU  - Zhao,J Y
TI  - Direct frequency comb optical frequency standard based on two-photon transitions of thermal atoms
SN  - 2045-2322
PY  - 2016///0210
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1038/srep15114
ER  -