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We observed ultralow-threshold Raman lasing using direct free-space excitation of whispering gallery modes in a deformed microtoroid. This simple and robust excitation method can overcome the inadequacies of taper coupling.
We report an observation of soliton rains in normal dispersion Yb fiber laser. The cavity consisted of a narrow filter and a broad birefringent plate filter. Soliton rain was obtained in the weak mode-locking regime.
The structure of a commercial highly birefringent PCF was locally tapered to create a polarizing section. A polarization-depended loss of at least 32.2 dB over a 1-cm length was induced in the 1550-nm region.
The polarization compositions of fundamental quasi-TE and quasi-TM modes of a strip silicon waveguide are characterized with free-space polarizers, and their polarization extinction ratios depend on the sizes of various apertures in the experimental setups.
We report high power operation of a Kagome-type HC-PCF at 1 μm. We demonstrate guidance of thin disk laser beam with powers in excess of 100 W in cw and 75 W in modelocked operation.
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.
Various bound states consisting of up to five solitons have been stably generated from a passively mode-locked fiber laser for the first time, using a carbon nanotube modelocker through intracavity gain/loss tuning.
A 1.2-km timing-stabilized, polarization-maintaining fiber link based on balanced optical cross-correlation was demonstrated with ∼0.9 fs RMS timing jitter over 16 days and ∼0.2 fs RMS timing jitter over 3 days.
We implemented for the first time both chirped pulse and divided pulse amplification in the same femtosecond fiber amplifier setup leading to the generation of 430 μJ, 320 fs pulses at 100 kHz.
The wavelengths and amplitudes of narrowband polarized cladding mode resonances in tilted fiber Bragg gratings provide high-Q probes of the anisotropic optical properties of various metal and semiconducting nanoparticle coatings and of their surroundings.
We report the first demonstration of nonlocal cancellation of differential dispersion between the long-short paths of a fiber-based Franson interferometer, restoring the otherwise limited visibility to an unprecedented 99.6% for time-energy entangled photons.
Low energy threshold (32 nJ) and flat supercontinuum spectrum in 1040–1240 nm wavelength are demonstrated by noise-like pump pulses in normally dispersive single mode fibers.
We report a GeO2 doped triangular-core photonic crystal fiber which is allow the generation of a hollow beam supercontinuum ranging from 540 to 1540 nm through a nonlinear-optical transformation by femtosecond pulses at 1038 nm.
We demonstrate optical trapping by a plasmonic lens fabricated on the tip of a singlemode fiber. Three-dimensional sub-wavelength confinement of one-micrometer-size glass beads is achieved.
We will report on our effort to scale the pulse energy and peak power from ultrashort pulse Tm doped fiber laser systems, with >1 μJ pulse energy within 300 fs duration after compression.
We demonstrate an Er:fiber ring laser operated at the fundamental repetition rate of 325 MHz. Two gain fibers with opposite dispersion were combined both for compactness and intra-cavity dispersion compensation.
This paper summarizes our recent progress in 2 micron fiber lasers using Tm and Tm-Ho-co-doped multi-component glass fibers. Single frequency fiber lasers with linewidth less than 3kHz, Q-switched single frequency fiber lasers with kilowatt peak power, and mode-locked fiber lasers near 2 micron wavelength were demonstrated using these newly developed fibers.
We utilize thulium doped PCF rods for amplification of ns-pulses in MOPA configuration and achieve MW-level peak powers with sub 10 ns pulses at 2 μm. The utilization of end caps will enable multi MW peak powers.
A linearly polarized Q-switching large-mode-area photonic crystal fiber laser at 978 nm is demonstrated. Short pulse of 14 ns duration is achieved with 36 dB polarization extinction ratio at 10 kHz repetition rate and 2 W output power.
A practical plasmonic THz fiber is described that features two metallic wires held together by the porous dielectric cladding. High porosity is required in order to guarantee low loss and low dispersion of guided modes.
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