Penetration depth in multiphoton fluorescence microscopy

@article{Gu2004PenetrationDI,
  title={Penetration depth in multiphoton fluorescence microscopy},
  author={Min Gu and Xiaosong Gan},
  journal={The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.},
  year={2004},
  pages={72-73}
}
In this paper, we demonstrate that the penetration depth under two-photon excitation is limited by the strength of two-photon fluorescence and is not necessarily larger than that under single-photon excitation, although image resolution is much higher in the former case.