We demonstrate an all-fiber-integrated, high-power chirped-pulse-amplification system operating at 1550 nm. The seed source is a soliton fiber laser with 156 MHz repetition rate. Two-stage single mode amplifier provides an amplification of more than 40 dB without significant spontaneous amplified emission. The power amplifier is based on cladding-pumped 10 µm-core Er-Yb co-doped fiber, the outp...

Highly accurate group delay measurements in long singlemode fibers were achieved over the full 1200-1600 nm spectral range by measuring phase shifts of a modulated lightwave. The high modulation frequency is shifted down to the kilohertz range using a second optical modulation at the fiber output end, so that low-frequency ultrasensitive detection and phase measurement can be performed with hig...

This communication presents the latest designs, fabrication steps and first results of large mode area fibres with aperiodic cladding structure for high power singlemode emission. Precompensation of thermal loading and first laser emission are detailed. OCIS codes: (140.3510) Lasers, fiber; (060.2280) Fiber design and fabrication; (060.5295) Photonic crystal fibers; (140.3295) Laser beam charac...

It is shown, that increasing the stability of synchronous self-oscillations in fiber lasers with nonlinear mirrors, based on micro-optomechanical resonators (micro-oscillators), can be achieved due to transformation wavefront laser radiation, interacting micro-oscillators. These transformations are unique properties mode interference composite singlemode-multimode-singlemode structures. Keyword...

An investigation of the polarization dependent loss (PDL) of macrobending loss sensitive single fiber (1060XP) is presented theoretically and experimentally. The experimental results are in good agreement with the modeling outcomes. Through the comparison of experimental results of PDL between 1060XP fiber with coatings and bare 1060XP fiber, it is shown that the fiber coating has significant i...

We report experimental measurements of the strain and temperature sensitivity of the optical phase in a singlemode polymer optical fibre. These values were obtained by measuring optical path length change using a Mach-Zender interferometer.