Soliton self-frequency shift (SSFS) enables energetic femtosecond pulse generation and deep-brain 3-photon microscopy (3PM) in animal models in vivo. The signal level in 3PM is currently limited by…
The spectroscopic properties of Er 3+ -doped tellurite glasses were investigated and a 1 wt.% Er 3+ -doped tellurite fiber was fabricated for L-band lasers. Wavelength-tunable fiber lasers in a lin…