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Laser emission into modes of a dielectric microsphere was observed from optically pumped HgTe quantum dots on its surface. Including real-time measurement of the input pump losses reveals nanowatt threshold levels for these lasers.
We present characterization of a fiber laser based on newly developed erbium and ytterbium doped double-clad fiber with cross section tailored for direct splicing with the pump and signal fibers.
We have derived an explicit analytical expression for the gain of a Brillouin fiber amplifier operating in the depleted pump regime. The accuracy of the obtained formula is validated both numerically and experimentally.
We demonstrate a muW-level broadly tunable THz source based on parametric down-conversion in orientation-patterned GaAs pumped by femtosecond pulses from a Tm-doped fiber laser. Generated THz powers should be scalable to mW-levels with this approach.
Benefits provided by a new high-power and low-noise laser for efficient first-order Raman co-pumping are experimentally investigated. 8 times 10 Gb/s WDM channels have been successfully transmitted over 70dB of standard single-mode fiber with realistic system margins.
Watts-level, continuous-wave pumped supercontinua, 1.06-1.7 mum, generated in a new low OH-loss PCF exhibit distinct spectral and noise dynamics when pumped with either high or low-intensity-noise 1 um sources. Applications to ultra-low-noise mum-scale OCT are analyzed.
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 have demonstrated a picosecond cryogenically-cooled Yb:YAG regenerative amplifier with diode pumping. A high pulse energy of 3.4 mJ was obtained with a 12.5-ps pulse duration at 500-Hz repetition rate.
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 describe a beam cleanup setup to convert a multimode beam into a singlemode beam by stimulated-Brillouin-scattering in a multimode gradient-index fiber. A M2=6.5 beam is converted into a M2=1.3 beam with 31% efficiency.
We report the first continuous-wave Yb3+-doped phosphate fiber laser. 12 W of diffraction-limited, 1.06-mum power was generated from a 71-cm length of double-clad fiber with 34 W of absorbed pump power.
We report on an ytterbium-doped rod-type 0.5-m long photonic crystal fiber (PCF) laser emitting 320-W in a fundamental mode from a 60-mum core. Furthermore, single-transverse-mode propagation in a passive photonic crystal 100-mum-core fiber is investigated.
Continuous-wave, visible emission from a silica microresonator on silicon by third harmonic generation is demonstrated. Emission is observed with pump powers <300 muW. This result opens the possibility of silicon microphotonic devices spanning from UV to NIR.
We demonstrate the generation and applications of microjoule-pulses directly obtained from laser oscillators with MHz repetition rates based on cavity-dumping and long-cavity concepts.
An end-pumped passively Q-switched Nd:YAG MOPA with a pulse energy of 52mJ, a 2.8ns-pulse duration and a M2ap1.2 is presented. Its optical-to-optical efficiency of 24% and temperature insensitivity is suitable for spaceborne altimetry.
We demonstrate 314 W continuous-wave output power at 1077 nm from a Yb-doped fiber laser with a truly single-mode core. The core employed a W-type refractive index profile that suppressed detrimental stimulated Raman scattering through spectral filtering.
We report a novel method for high-energy, few-cycle pulse generation through the combination of parametric amplification and enhancement cavities. Dispersion in the cavity ceases to be a concern with the use of long pump pulses.
Broadband pulse amplification is demonstrated with a fiber laser pumped high repetition rate optical parametric amplifier. Subsequent pulse compression in a prism sequence resulted in 46 fs pulses with peak powers above 10 MW.
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