Efficient frequency doubling of soliton self-frequency shifted ultrashort pulses

We present the design and performance of robust and reliable ultrafast laser system with 1675nm and 837 nm wavelengths for multi-photon bioimaging. The laser system is based on femtosecond Er
³
+ fiber laser with further soliton self-frequency shift and frequency doubling stages. Both signals will be used for nonlinear imaging which allows getting additional information for extracting contrast from unstained tissue.