We combine an all-fiber dual wavelength, self-synchronized laser and a dedicated multi-channel detection unit to perform state-of-the-art multiplex Stimulated Raman Scattering (SRS) microscopy. The system covers the full CH spectrum in 1 μs reaching shot-noise limited performances with 25 μW per detection channel. This all-inone solution is based on a passively synchronized dual-wavelength laser source with shot-noise limited relative intensity noise from 600 kHz and a modular multi-channel lock-in detection unit. The synergistic design between laser source and detection system simplifies multiplex SRS implementation for real-time full-chemical imaging.
The laser performance of a short-length Yb-doped rod-type photonic crystal fiber (PCF) laser is studied experimentally both in the three-level scheme and quasi-four-level scheme in this contribution. In the free oscillation mode, the rod-type PCF laser produce 13.6 W output power on the quasi-four-level system with center wavelength of 1030 nm. The laser operating on the three-level system is obtained with the introduction of specialized feedback around the 976 nm radiation. Up to 7 W output power is generated with wavelength centered in 978 nm.
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