Browsing by Keywords "Nonlinear optics"
Now showing items 1-20 of 20
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All-chalcogenide core-shell fibers for nonlinear applications
(Bilkent University, 2015-11)The extreme spectral broadening phenomenon called as Supercontinuum generation is considered as one of the most striking phenomenon in nonlinear optics. Due to their broad spectra and uniformly distributed power over the ... -
Amplitude noise of femtosecond fiber lasers in different modelocking regimes
(OSA, 2007)Amplitude noise of femtosecond fiber laser oscillators are characterized in soliton, similariton, stretched-pulse and all-normal GVD regimes of mode-locking. Integrated relative intensity noise as low as 0.023% (1 Hz-100 ... -
Buried waveguides written deep inside silicon
(OSA, 2017)Summary form only given. Silicon waveguides are widely used as optical interconnects and they are particularly important for Si-photonics. Si-based devices, along with other optical elements, are entirely fabricated on the ... -
Characterization of thermally poled germanosilicate thin films
(Optical Society of American (OSA), 2004)We report measurements of the nonlinearity profile of thermally poled low-loss germanosilicate films deposited on fused-silica substrates by PECVD, of interest as potential electro-optic devices. The profiles of films grown ... -
Computer-generated holograms embedded in bulk silicon with nonlinear laser lithography
(IEEE, 2016)Recently, we have showed a direct laser writing method to form subsurface structures inside silicon by exploiting nonlinear interactions. Here, we demonstrate utilization of this phenomenon to create computer-generated ... -
Dynamic nonlinear optical processes in some oxygen-octahedra ferroelectrics: first principle calculations
(Taylor & Francis Inc., 2015)The nonlinear optical properties and electro-optic effects of some oxygen-octahedra ferroelectrics are studied by the density functional theory (DFT) in the local density approximation (LDA) expressions based on first ... -
Highly efficient wavelength conversion of Q-switched Nd: YAG lasers into a red wavelength
(Institute of Electrical and Electronics Engineers, 2006)We report a nanosecond upconversion optical parametric oscillator which can convert the output of a Nd:YAG laser at 1064-nm wavelength into 627 nm with high efficiency. This device is based on a single KTiOAsO4 crystal ... -
Linear and non-linear optical properties of AgBO3(B=Nb, Ta): First principle study
(IEEE, 2013)The linear and nonlinear optical properties of ferroelectrics AgBO 3 (B=Ta, Nb) are studied by density functional theory (DFT) in the local density approximation (LDA) expressions based on first principle calculations ... -
Multimode pumping of optical parametric oscillators
(Institute of Electrical and Electronics Engineers, 1996-02)Calculations suggest that optical parametric oscillators (OPO's) can be efficiently pumped using multimode, divergent pump sources. The influence of pump beam divergence and mode structure upon OPO performance is measured ... -
Nanosecond sum-frequency generating optical parametric oscillator using simultaneous phase matching
(Optical Society of American (OSA), 2005)We report a nanosecond sum-frequency generating optical parametric oscillator based on a single KTiOAsO4 crystal that is simultaneously phase matched for optical parametric generation and sum-frequency generation. Pumped ... -
Nonlinearity-tailored fiber laser technology for low-noise, ultra-wideband tunable femtosecond light generation
(OSA - The Optical Society, 2017)The emission wavelength of a laser is physically predetermined by the gain medium used. Consequently, arbitrary wavelength generation is a fundamental challenge in the science of light. Present solutions include optical ... -
Optical properties of the two-dimensional magnetoexcitons under the influence of the Rashba spin-orbit coupling
(SPIE, 2011)The influence of the Rashba spin-orbit coupling on the two-dimensional (2D) electrons and holes in a strong perpendicular magnetic field leads to different results of the Landau quantization in different spin projections. ... -
Simplified calculations of band-gap renormalization in quantum-wells
(Academic Press, 1996)Non-linear optical properties of photoexcited semiconductor quantum-wells are of interest because of their opto-electronic device application possibilities. Many-body interactions of the optically created electrons and ... -
Simultaneous phase matching of optical parametric oscillation and second-harmonic generation in aperiodically poled lithium niobate
(Optical Society of American (OSA), 2003)We report a simple ad hoc method for designing an aperiodic grating structure to quasi-phase match two arbitrary second-order nonlinear processes simultaneously within the same electric-field-poled crystal. This method ... -
Spectrally resolved nonlinear optical properties of doped versus undoped quasi-2D semiconductor nanocrystals: copper and silver doping provokes strong nonlinearity in colloidal CdSe nanoplatelets
(American Chemical Society, 2022-01-04)Nonlinear optical processes are crucial for emerging applications including multiphoton-excited fluorescence microscopy and optical power limiting. Therefore, searching for materials of high multiphoton absorption cross ... -
Sub-50 fs all-fiber Yb-doped laser with anomalous-dispersion photonic crystal fiber
(IEEE, 2013)An intense research effort has been channelled into improving mode-locked Yb-fiber oscillators in recent years. Despite efforts in all-normal dispersion oscillators, dispersion management is evidently necessary to reach ... -
Tapered nanoscale chalcogenide fibers directly drawn from bulk glasses as optical couplers for high-index resonators
(OSA - The Optical Society, 2017)We report production of air-clad tapered chalcogenide fibers by directly drawing bulk glasses between cleaved tips of tapered silica fibers. Exploiting these tapered fibers with nanoscale waists as evanescent optical ... -
Thermally poled germanosilicate films with high second-order nonlinearity
(IEEE, 2005)Accurate measurements of the second-order nonlinearity profile of thermally poled low-loss germanosilicate films grown on fused-silica substrates are reported, of interest as potential electro-optic devices. After optimization, ... -
Ultralow-threshold up-converted lasing in oligofluorenes with tailored strong nonlinear absorption
(Royal Society of Chemistry, 2015)Nonlinear optical response in organic semiconductors has been an attractive property for many practical applications. For frequency up-converted lasers, to date, conjugated polymers, fluorescent dyes and small organic ... -
Wafer bonded capacitive micromachined underwater transducers
(IEEE, 2009-09)In this work we have designed, fabricated and tested CMUTs as underwater transducers. Single CMUT membranes with three different radii and 380 microns of thickness are fabricated for the demonstration of an underwater CMUT ...
