Study On Soliton Self-Frequency Shift In A Tm-Doped Fiber Amplifier Seeded By A Kelly-Sideband-Suppressed Conventional Soliton

We experimentally present mid-infrared Raman soliton self-frequency shift (SSFS) process in a Tm-doped fiber amplifier using sideband-suppressed conventional solitons as seed pulses. The strong Kelly sidebands of the soliton oscillator were efficiently suppressed (more than 21 dB) using a home-made all-fiber Lyot filter (AFLF). As a result, the Raman solitons with a continuously tunable wavelength of 1.95-2.34 mu m were achieved, with a high soliton energy conversion of >93% over the range of 1.95-2.24 mu m. The conversion efficiency and tunable range of Raman solitons were both significantly improved, comparing to the same amplifier seeded with sideband-unsuppressed pulses. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement