Femtosecond lasers in biological imaging: enabling advanced multiphoton modalities

Femtosecond lasers continue to drive advances in multiphoton imaging, enabling high-resolution visualization across a range of biological applications—from deep-tissue microscopy to label-free chemical contrast in cancer diagnostics. Imaging modalities such as two-photon, three-photon, and other nonlinear techniques depend on precise ultrafast laser sources to probe dynamic cellular processes with minimal photodamage. In neuroscience, voltage and calcium imaging facilitate tracking of neural signals at both cellular and network levels. In oncology, vibrational techniques like Stimulated Raman Scattering (SRS) deliver chemical contrast for identifying tumor boundaries and metabolic heterogeneity in situ. This presentation will focus on how ultrafast laser performance shapes experimental design and biological insight, supported by application case studies.