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By using a rigorous modeling method, the SPR properties in a helical PCF has been simulated for the first time and the resonance effects have been studied by using finite element method. The results show that spiral path will increase propagation loss, but resonance peak values of the spectrum decrease. This is due to a light dispersion away from the center core, causing the energy transfer reduction...
The advanced laser technology has led to gigahertz level repetition rate femtosecond fiber laser possible. This laser offers advantages of high average power, chirp-free output pulses and helps the frequency comb made compact and simplified.
We report the design and fabrication of tapered photonic crystal fibers for efficient fceo detection and ultra-flat visible super-continuum generation, which are used in an astro-comb system.
Tapered photonic crystal fiber was designed and fabricated to support an octave spanning supercontinuum generation, directly pumped by an 500 MHz Yb:fiber oscillator. More than 40dB fceo signals were detected and locked.
We demonstrated a near all-fiber femtosecond Yb:laser frequency comb incorporated with three different photonic crystal fibers. The comb removes most of free-space components so that it is more compact and stable.
We report the green-enhanced (530 nm) super-continuum generation in a tapered photonic crystal fiber by 280 pJ pulses from a mode-locked Yb:fiber laser. This system offers a technique for efficient ƒceo beating signal detection.
We report direct generation of 500MHz Yb:fiber laser frequency comb. The offset frequency was stabilized more than 6 hours in an open air environment. The stabilized repetition rate has an in-loop tracking stability of 4.46×10−13/τ1/2.
We demonstrate the first 1 GHz fundamental repetition rate ring cavity ytterbium doped fiber laser. The laser delivers 600 mW, 64fs near transform-limited pulses and supports direct octave-spanning spectrum generation.
We demonstrate a passively all-normal dispersion mode-locked Nd-doped fiber laser at 905–940 nm with high optical to optical efficiency. The central wavelengths can be tunable through tuning birefringent filter.
We report a compact Yb:fiber ring laser operated at 616 MHz. The average output power is 450 mW at a pump power of 900 mW. The dechirped pulse width is 98 fs.
We demonstrate sub-50 fs pulses generation directly from a 750 MHz repetition rate dispersion managed Yb: fiber ring laser by precision compensation of the intracavity dispersion.
We demonstrate octave-spanning spectrum generation in tapered silica and tellurite photonic crystal fibers pumped by a compact 503 MHz repetition rate mode-locked Yb:fiber ring oscillator and amplifier system.
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