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We realized a wavelength-tunable mode-locked fiber laser using intracavity dispersion. Continuous tuning over 100 nm was obtained at a sweep rate of 20 kHz. Discrete tuning was achieved over 39 nm by inserting a FFPI into the cavity.
A switchable multiwavelength erbium-doped fiber laser with a multimode FBG and highly nonlinear PCF is demonstrated. Stable five-wavelength operation with 0.8 nm spacing was achieved. Switching between stable one- to four-wavelength operations is also demonstrated.
Soft-glass photonic-crystal fiber is used to generate broad supercontinuum using an all-fiber-femtosecond laser. The bandwidth exceeds 1700 nm and has average powers in excess of 100 mW with 46-MHz repetition rate.
We demonstrate the use of a prism-grating sequence to reduce third-order dispersion inside a modelocked Yb fiber laser. 33-fs pulses, the shortest from a fiber oscillator, can be generated with extremely clean profiles.
23 W, single-mode linearly-polarized 0.4 nm linewidth CW generation is achieved in a polarization-maintaining fiber Raman cavity pumped by a linearly-polarized Ytterbium fiber laser and applied to 3 W 589 nm second harmonic generation in MgO-PPLN.
We report on efficient nonlinear frequency doubling of broadband near-infrared pulses from a femtosecond fiber laser into narrowband visible radiation tunable from green to red with average power levels up to 9.5 mW.
A picosecond single-mode, linearly polarized fiber source producing 176 W of average power was employed to generate up to 80 W average power at 530 nm by frequency doubling through a single LBO crystal.
We report on an Ytterbium gain band, holey fiber based modulation instability laser. The all fiber integrated source produces a 40 GHz train of 4 ps pulses at a wavelength of 1064 nm.
A distorting optical object is illuminated with a wavelength-swept fiber laser to investigate how changes in wavelength affect image quality degraded by speckle/interference noise. An experimental result showing excellent reduction of speckle/interference is presented.
Synchronization of actively Q-switched Erbium and Ytterbium doped fiber lasers with a single electrostatically actuated deformable metallic micro-mirror is reported. Sum frequency generation in PPLN crystal leading to a tunable red radiation is demonstrated.
We report a bandwidth-enhanced multi-wavelength source from a stimulated Brillouin scattering assisted erbium-doped fiber laser using four-wave-mixing in a 35-cm highly nonlinear bismuth oxide fiber. Tuning of output wavelengths and wavelength spacing have been demonstrated.
25 mW-output-power-Er/Brillouin-oscillator and a periodically-poled optical fiber with a quasi-phase-matching resonance at 1.56 mum are the simplest way to realize nanosecond, all-fiber laser sources operating at ~778 nm and ~389 nm. 25 W-peak-power-pulse-train generated at ~778 nm with 120 mW-diode-pumping is reported.
We report passive harmonic-mode-locking of an Yb-fiber laser at repetition rates continuously scalable to 1.5 GHz. This laser demonstrates an unprecedented combination of high repetition rate, high pulse energy and excellent pulse quality.
Self mode-locked Ytterbium-doped fiber (YDF) ring-laser is presented that consisted of all polarization-maintaining (PM) fiber system, especially single-mode PM-YDF with side-hole type. Environmentally stable pulses and a wide tuning range of 60 nm were obtained.
We report on the spectral compression of an all fiber integrated ultrashort pulse source using both transmission grating pairs and aircore photonic bandgap fiber to provide the required negative chirp.
Coherent combining of mode-locked erbium doped fiber lasers in a two arm interferometer resonator is investigated. The spectral filtering leads to the emission of short pulse packets with high adjustable repetition rate up to 200 GHz.
We demonstrate a resonant semiconductor saturable absorber used in transmission for mode-locking of fiber lasers. The cavity-enhanced modulation depth corresponding to low-loss transmission state enables a robust self-starting mode-locking highly tolerant to cavity dispersion.
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