300 mW 45 MHz fundamental mode-locking all-fiber ring Mamyshev oscillator at 1 µm.

In this Letter, we present an experimental demonstration of an all-fiber ring Mamyshev oscillator (MO) that delivers a 300 mW optical power at a repetition rate of 45 MHz. Numerical design has shown that more than 70 MHz repetition rate is achievable in a ring cavity configuration using standard step-index fibers and components. Interest of WDM type filtering on pulse duration is especially shown.

All-polarization-maintaining and high-energy fiber optical parametric chirped-pulse amplification system using a solid core photonic hybrid fiber.

We present an all-fiber optical parametric chirped-pulse amplification integrated system delivering a single-mode polarized beam. The system makes use of a specifically designed solid-core photonic hybrid fiber (i.e.

Origin of spontaneous wave mixing processes in multimode GRIN fibers.

We show that geometric parametric instability (GPI) in graded-index multimode fibers is strongly influenced by higher-order dispersion. By measuring the output spectrum for different core radii, we distinguish peaks generated by GPI from other coexisting parametric processes using phase-matching arguments and numerical simulations. We highlight for the first time a non-degenerate GPI process involving two pumps at different wavelengths.

Measurements of the absolute timing jitter and intensity noise of an all-fiber Mamyshev oscillator.

We present the experimental investigation of timing jitter and relative intensity noise of a Mamyshev ring oscillator operating in the fundamental mode-lock regime. We find that both timing jitter and intensity noise spectra are correlated to the output optical power with noise increase close to the loss of the mode-locking. In addition, we have investigated the dependence of the spectral filters wavelength separation on both timing jitter and intensity noise showing a severe degradation with filters overlapping.

Double clad tubular anti-resonant hollow core fiber for nonlinear microendoscopy.

We report the fabrication and characterization of the first double clad tubular anti-resonant hollow core fiber. It allows to deliver ultrashort pulses without temporal nor spectral distortions in the 700-1000 nm wavelength range and to efficiently collect scattered light in a high numerical aperture double clad. The output fiber mode is shaped with a silica microsphere generating a photonic nanojet, making it well suitable for nonlinear microendoscopy application.