Gigahertz repetition rate Tm doped fiber laser passively mode locked by optoacoustic effects in nanobore photonic crystal fiber.
We report a Tm doped soliton fiber laser passively mode locked by intense optoacoustic interactions in a short length of solid core silica photonic crystal fiber (PCF) with a nanobore in core center. A repetition rate of 1.446 GHz pulse is achieved, corresponding to the 52nd harmonic of the 27.8 MHz cavity round trip frequency. Strong optoacoustic interactions in this PCF based, Tm doped fiber laser ensure stable and repeatable gigahertz rate pulse train generation at 1.85 mm wavelength, with a high supermode noise suppression ratio and low pulse timing jitter.
Optics letters