Recent developments in telecommunications, frequency metrology, and medical imaging have motivated research in ultrafast optics. Demand exists for broadband components and sources as well as highly nonlinear fibers and materials. For this thesis, several different devices have been developed for such applications. Broadband saturable absorbers based on III/V and Si materials systems were develo...

We report on an ytterbium-free, erbium-doped single-mode all-fiber laser reaching a record output power of 107 W at 1598 nm, with slope efficiency 38.6% according to the absorbed pump 981 nm. The gain fiber, co-doped cerium, aluminum, and phosphorus, was fabricated in-house adjusted doping concentrations reduce erbium ions clustering, thereby increasing while keeping numerical aperture low ensu...

This thesis reports work on passive mode-locking of thulium-doped and erbium-doped fiber ring lasers using the technique of polarization additive pulse mode-locking (PAPM). A self-starting, mode-locked Tm+3-doped fiber laser was demonstrated with 360 to 500 fsec pulses tunable from 1.8 to 1.9 pm, the largest tuning range demonstrated from a rare-earth doped fiber. This laser operated in the sol...

Single-crystal rare-earth doped YAG fiber lasers grown by the laser-heated pedestal growth technique Report Title High concentrations of the rare-earth elements erbium, holmium and thulium have been successfully doped into single crystal (SC) yttrium aluminum garnet (YAG, Y3Al5O12) fibers by use of the laser heated pedestal growth (LHPG) method. The spontaneous emission spectra and fluorescence...

Broadband graphene oxide/PVA films were used as saturable absorbers (SAs) for mode locking erbium-doped fiber laser (EDFL) and ytterbium-doped fiber laser (YDFL) at 1.06 μm and 1.55 μm. They provide modulation depths of 3.15% and 6.2% for EDFL and YDFL, respectively. Stable self-starting mode-locked pulses are obtained for both lasers, confirming that the graphene oxide is cost-effective. We ha...

BACKGROUND AND OBJECTIVE Recently Erbium (Er) YAG laser has been developed for dentistry. It may be suitable for periodontal therapy. This study examined the bactericidal effect of the Er: YAG laser on periodontopathic bacteria in vitro. STUDY DESIGN/MATERIALS AND METHODS After spreading the bacterial suspension of Porphyromonas gingivalis or Actinobacillus actinomycetemcomitans on agar plate...

The temperature dependence of a Faraday rotator mirror (FRM) used in a reflective erbium doped fiber amplifier(R-EDFA) is reported in this paper. The influence of this dependence on the polarization state (PS) of amplified optical signals is also discussed.

This paper reports on theoretically investigated transmission performance depending on the chirping and extinction ratio for a 1550 nm, 10Gb/s transmissions system with the standard single mode fiber. The transmission performance can be improved by adjusting chirp and extinction ratio in a Ti:LiNbO3 modulator-based transmitter and erbium-doped fiber amplifier (EDFA)-PIN receiver configuration.

We report on the observation of ,1.54 mm guided wave absorption and ̄uorescence in channel waveguides fabricated in erbium-doped thin-®lm epitaxial BaTiO3. Luminescence transient measurements indicate that the relaxation of the excited Er ions is dominantly radiative. q 2000 Elsevier Science S.A. All rights reserved.

We report on the gamma-radiation test of various state-of-the-art commercially available erbium-doped fibres. Insitu measurements of the optical characteristics allow to compare the radiation response of the different fibres and to determine the influence of the fibre parameters.