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We present an experimental and numerical study of supercontinuum generation extended in the visible part of the spectrum by using a selective optical coupling of the pump wave in the largely anomalous dispersion regime. The broadband frequency generation is induced by an initial four-wave mixing process that converts the pump wave at 1064 nm into 831 nm(More)
We implement both chirped pulse amplification and divided pulse amplification in the same femtosecond fiber amplifier setup. This scheme allows an equivalent stretched pulse duration of 2.4 ns in a compact tabletop system. The generation of 77 W of compressed average power at 4.8 MHz, together with 320 fs and 430 μJ pulses at a repetition rate of 96 kHz, is(More)
We demonstrate the generation of 68 fs secant hyperbolic pulses at a 105 MHz repetition rate with an average power of 520 mW from a diode-pumped Yb(3+):CaGdAlO(4) mode-locked laser. A semiconductor saturable absorber allows passive mode locking, and a 15 W diode laser is used to pump directly the crystal. To our knowledge this represents the highest average(More)
We address the problem of soliton phase jitter caused by fiber amplifier noise in a communication channel. An analytical expression for phase jitter is derived by use of perturbation theory. In the absence of filters the variance of the phase is found to be proportional to the cube of the propagation distance, but it increases only linearly if in-line(More)
A simple, stable, and tunable optical pulse source emitting 3.2 ps pulses at a 10 GHz repetition rate is presented. The pulses are obtained through soliton-assisted time-lens compression in a standard single mode fiber, and are fully characterized by wavelength-conversion frequency-resolved optical gating. The use of nonlinear effects relaxes the constraint(More)
We propose a method to compensate gain narrowing by use of the self-phase modulation effect in a femtosecond fiber chirped-pulse amplifier (CPA). An engineering rule is derived to determine the stretched pulse duration that allows this compensation. Simulations are carried out to validate this idea. A tradeoff is found between achievable pulse duration and(More)
We report on the development of an efficient and simple picosecond diode-pumped solid-state laser source with a versatile repetition rate (typically 1 Hz-1 MHz) for material processing applications. The laser source is based on a 4 MHz repetition rate mode-locked oscillator and a passive 3D multipass amplifier both based on Nd:YVO(4) crystals.(More)
We demonstrate a new modulation format based on differential phase-shift keying (DPSK) with a duobinary-shaped modulating signal for applications in optical communications. Compared to conventional DPSK and using the 20-dB full-width criterion, numerical and experimental data show a bandwidth reduction by a factor of two resulting in a better tolerance to(More)
We present a frequency-resolved optical gating geometry permitting the characterization of 1-mW average power 2.5-ps pulses over the whole C-band at 10-GHz repetition rate. This represents an order of magnitude improvement in sensitivity over other reported self-referenced characterization techniques. Measurements of pulses from an actively mode-locked(More)
We report on chirped-pulse amplification in a large-mode-area erbium-doped fiber emitting in a water transparency window. 1.5 microJ 605 fs pulses are generated at 1.6 microm with a repetition rate of 300 kHz; this corresponds to an average power of 460 mW. Nonlinearities are adjusted on the global system to compensate for the dispersion mismatch between(More)