All-Fiber System at 1750 nm Delivering 35 fs 230 kW Peak Power Pulses

Ultra-short ( 1.55 μm) are very attractive for many applications such as three-photon microscopy1, frequency metrology2, or high harmonic generation3. Solitonic self-compression is an attractive effect for this purpose as compression to sub-50 fs pulses can be achieved without the need for external compressing optics, directly out of an optical fiber. Self-compression at high energy was demonstrated around 2 μm in all-solid4 or gas-filled5 hollow-core-PCFs. However, the latter demonstrations were restricted to Tm emission band in order to reach the soliton self-compression effect in low-nonlinearity media. In this communication, we present a compact monolithic all-fiber source of ultrashort (35 fs) pulses emitting outside conventional lasing bands, from 1.65 to 2 μm based on Raman-induced soliton self-frequency shift (SSFS) and soliton self-compression (SSC).