Abstract

Ultra-short (<70 fs) pulses in the short-wavelength infrared (>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).

© 2019 IEEE

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