The Experts below are selected from a list of 11589 Experts worldwide ranked by ideXlab platform
Lute Maleki - One of the best experts on this subject based on the ideXlab platform.
-
brillouin lasing with a caf2 whispering gallery mode resonator
Physical Review Letters, 2009Co-Authors: Ivan S Grudinin, Andrey B. Matsko, Lute MalekiAbstract:Stimulated Brillouin scattering with both pump and Stokes beams in resonance with whispering gallery modes of an ultrahigh Q Calcium Fluoride resonator is demonstrated for the first time. The resonator is pumped with 1064 nm light and has 3 µW Brillouin lasing threshold. The scattering is observed due to the unique morphology of the resonator reducing the phase mismatch between the optical modes and the hypersound wave.
-
Ringdown spectroscopy of stimulated Raman scattering in a whispering gallery mode resonator
Optics letters, 2007Co-Authors: Anatoliy A. Savchenkov, Andrey B. Matsko, Makan Mohageg, Lute MalekiAbstract:We report experimental observations of power-dependent, nonexponential decay of light stored in whispering gallery modes caused by stimulated Raman scattering in the resonator host material. Specifically, we show that the instantaneous decay rate of whispering gallery modes of a Calcium Fluoride resonator increases as the amount of light stored in the resonator decreases.
Harald G L Schwefel - One of the best experts on this subject based on the ideXlab platform.
-
sub khz lasing of a caf_2 whispering gallery mode resonator stabilized fiber ring laser
Optics Express, 2014Co-Authors: Michele C Collodo, B Sprenger, S Svitlov, L J Wang, Florian Sedlmeir, Harald G L SchwefelAbstract:We utilize a high quality Calcium Fluoride whispering-gallery-mode resonator to passively stabilize a simple erbium doped fiber ring laser with an emission frequency of 196THz (wavelength 1530nm) to an instantaneous linewidth below 650Hz. This corresponds to a relative stability of 3.3 × 10−12 over 16μs. In order to characterize the linewidth we use two identical self-built lasers and a commercial laser to determine the individual lasing linewidth via the three-cornered-hat method. We further show that the lasers are finely tunable throughout the erbium gain region.
-
caf2 whispering gallery mode resonator stabilized narrow linewidth laser
arXiv: Optics, 2012Co-Authors: B Sprenger, Harald G L Schwefel, S Svitlov, L J WangAbstract:A fiber laser is stabilized using a Calcium Fluoride (CaF2) whispering-gallery-mode resonator. It is set up using a semiconductor optical amplifier as a gain medium. The resonator is critically coupled through prisms, and used as a filtering element to suppress the laser linewidth. Using the self-heterodyne beat technique the linewidth is determined to be 13 kHz. This implies an enhancement factor of 10^3 with respect to the passive cavity linewidth. The three-cornered hat method shows a stability of 10^(-11) after 10 \mu s.
-
sub khz lasing of a caf_2 whispering gallery mode resonator stabilized fiber ring laser
arXiv: Optics, 2012Co-Authors: Michele C Collodo, B Sprenger, S Svitlov, L J Wang, Florian Sedlmeir, Harald G L SchwefelAbstract:We utilize a high quality Calcium Fluoride whispering-gallery-mode resonator to stabilize a simple erbium doped fiber ring laser with an emission frequency of 196 THz (wavelenght 1530 nm) to a linewidth below 650 Hz. This corresponds to a relative stability of 3.3 x 10^(-12) over 16 \mus. In order to characterize the linewidth we use two identical self-built lasers and a commercial laser to determine the individual lasing linewidth via the three-cornered hat method.
Eric C Reynolds - One of the best experts on this subject based on the ideXlab platform.
-
in vitro study of the effect of casein phosphopeptide amorphous Calcium Fluoride phosphate on iatrogenic damage to enamel during orthodontic adhesive removal
American Journal of Orthodontics and Dentofacial Orthopedics, 2011Co-Authors: Roslyn J Mayne, N J Cochrane, F Cai, Michael G Woods, Eric C ReynoldsAbstract:Introduction White-spot lesions (WSL) might be susceptible to mechanical damage during orthodontic bracket and adhesive removal. The aims of this in-vitro study were to investigate enamel loss on bracket and adhesive removal when the brackets were surrounded by WSL and to determine the effect of remineralizing these lesions with a 1% (w/v) casein phosphopeptide amorphous Calcium Fluoride phosphate (CPP-ACFP) solution before bracket and adhesive removal. Methods Precoated metal mandibular incisor brackets were centrally bonded onto polished third molars and WSL produced by exposure to a demineralization buffer for 4, 12, and 30 days (n = 20 per group). Half of the demineralized window was covered with acid-resistant nail varnish, and the specimens were then subjected to remineralization with 1% CPP-ACFP. Brackets and residual adhesive were removed, and enamel damage was assessed by digital photography, profilometry, and scanning electron microscopy. Lesion depth, mineral loss, and remineralization were measured by transverse microradiography. Results WSL enamel around the bracket was more susceptible to iatrogenic damage at adhesive removal compared with sound enamel. Remineralization of lesions with 1% CPP-ACFP before adhesive removal significantly ( P Conclusions Remineralizing WSLs with CPP-ACFP before adhesive removal reduced iatrogenic enamel damage.
-
enamel subsurface lesion remineralisation with casein phosphopeptide stabilised solutions of Calcium phosphate and Fluoride
Caries Research, 2008Co-Authors: N J Cochrane, Keith J Cross, S Saranathan, Eric C ReynoldsAbstract:Casein phosphopeptide stabilised amorphous Calcium phosphate (CPP-ACP) and amorphous Calcium Fluoride phosphate (CPP-ACFP) solutions have been shown to remineralise enamel subsurface lesions. The aim
-
nmr studies of a novel Calcium phosphate and Fluoride delivery vehicle αs1 casein 59 79 by stabilized amorphous Calcium Fluoride phosphate nanocomplexes
Biomaterials, 2004Co-Authors: Keith J Cross, N L Huq, David P Stanton, M Sum, Eric C ReynoldsAbstract:The repair of early tooth enamel lesions has been recently demonstrated by tryptic phosphopeptides derived from milk caseins that associate with amorphous Calcium phosphate (ACP) forming stable complexes. These casein phosphopeptides (CPP), containing the cluster sequence-Ser(P)-Ser(P)-Ser(P)-Glu-Glu-, form Calcium phosphate delivery vehicles that retard enamel demineralization and promote remineralization. Recently, we have shown that these peptides also stabilize Calcium Fluoride phosphate as soluble complexes. These complexes designated CPP-ACFP, have the potential to provide superior clinical efficacy in preventing dental caries and treating and repairing early stages of disease. In an approach to determine the ultrastructure of the casein phosphopeptide-amorphous Calcium Fluoride phosphate complexes, we have studied the structure of the predominant peptide alpha(S1)-CN(59-79) bound to ACFP using nuclear magnetic resonance (NMR) spectroscopy and X-ray diffraction. The alpha(S1)-CN(59-79) peptide stabilized Calcium Fluoride phosphate as amorphous nanocomplexes with a hydrodynamic radius of 2.12+/-0.26 nm. The nanocomplexes exhibited stoichiometry of one peptide to 15 Calcium, nine phosphate and three Fluoride ions. Sequence-specific resonance assignments were determined for the peptide alpha(S1)-CN(59-79) complexed to the ACFP. The secondary structure of the peptide alpha(S1)-CN(59-79) was characterized by sequential (i, i+1), medium-range (i, i+2) nOes and H alpha chemical shifts. The spectral data were compared with that of the peptide alpha(S1)-CN(59-79) bound to Calcium ions, revealing that the structurally significant secondary NH and alpha-chemical shifts were similar.
L J Wang - One of the best experts on this subject based on the ideXlab platform.
-
sub khz lasing of a caf_2 whispering gallery mode resonator stabilized fiber ring laser
Optics Express, 2014Co-Authors: Michele C Collodo, B Sprenger, S Svitlov, L J Wang, Florian Sedlmeir, Harald G L SchwefelAbstract:We utilize a high quality Calcium Fluoride whispering-gallery-mode resonator to passively stabilize a simple erbium doped fiber ring laser with an emission frequency of 196THz (wavelength 1530nm) to an instantaneous linewidth below 650Hz. This corresponds to a relative stability of 3.3 × 10−12 over 16μs. In order to characterize the linewidth we use two identical self-built lasers and a commercial laser to determine the individual lasing linewidth via the three-cornered-hat method. We further show that the lasers are finely tunable throughout the erbium gain region.
-
caf2 whispering gallery mode resonator stabilized narrow linewidth laser
arXiv: Optics, 2012Co-Authors: B Sprenger, Harald G L Schwefel, S Svitlov, L J WangAbstract:A fiber laser is stabilized using a Calcium Fluoride (CaF2) whispering-gallery-mode resonator. It is set up using a semiconductor optical amplifier as a gain medium. The resonator is critically coupled through prisms, and used as a filtering element to suppress the laser linewidth. Using the self-heterodyne beat technique the linewidth is determined to be 13 kHz. This implies an enhancement factor of 10^3 with respect to the passive cavity linewidth. The three-cornered hat method shows a stability of 10^(-11) after 10 \mu s.
-
sub khz lasing of a caf_2 whispering gallery mode resonator stabilized fiber ring laser
arXiv: Optics, 2012Co-Authors: Michele C Collodo, B Sprenger, S Svitlov, L J Wang, Florian Sedlmeir, Harald G L SchwefelAbstract:We utilize a high quality Calcium Fluoride whispering-gallery-mode resonator to stabilize a simple erbium doped fiber ring laser with an emission frequency of 196 THz (wavelenght 1530 nm) to a linewidth below 650 Hz. This corresponds to a relative stability of 3.3 x 10^(-12) over 16 \mus. In order to characterize the linewidth we use two identical self-built lasers and a commercial laser to determine the individual lasing linewidth via the three-cornered hat method.
Michele C Collodo - One of the best experts on this subject based on the ideXlab platform.
-
sub khz lasing of a caf_2 whispering gallery mode resonator stabilized fiber ring laser
Optics Express, 2014Co-Authors: Michele C Collodo, B Sprenger, S Svitlov, L J Wang, Florian Sedlmeir, Harald G L SchwefelAbstract:We utilize a high quality Calcium Fluoride whispering-gallery-mode resonator to passively stabilize a simple erbium doped fiber ring laser with an emission frequency of 196THz (wavelength 1530nm) to an instantaneous linewidth below 650Hz. This corresponds to a relative stability of 3.3 × 10−12 over 16μs. In order to characterize the linewidth we use two identical self-built lasers and a commercial laser to determine the individual lasing linewidth via the three-cornered-hat method. We further show that the lasers are finely tunable throughout the erbium gain region.
-
sub khz lasing of a caf_2 whispering gallery mode resonator stabilized fiber ring laser
arXiv: Optics, 2012Co-Authors: Michele C Collodo, B Sprenger, S Svitlov, L J Wang, Florian Sedlmeir, Harald G L SchwefelAbstract:We utilize a high quality Calcium Fluoride whispering-gallery-mode resonator to stabilize a simple erbium doped fiber ring laser with an emission frequency of 196 THz (wavelenght 1530 nm) to a linewidth below 650 Hz. This corresponds to a relative stability of 3.3 x 10^(-12) over 16 \mus. In order to characterize the linewidth we use two identical self-built lasers and a commercial laser to determine the individual lasing linewidth via the three-cornered hat method.
