A5000382831- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Optical Coherence Tomography Applications
- Photonic and Optical Devices
- Advanced Fluorescence Microscopy Techniques
- Chemical Thermodynamics and Molecular Structure
- Photorefractive and Nonlinear Optics
- Radiative Heat Transfer Studies
- Scientific Measurement and Uncertainty Evaluation
- Advanced Optical Network Technologies
- Astronomical and nuclear sciences
- Calibration and Measurement Techniques
- Near-Field Optical Microscopy
- Advanced Optimization Algorithms Research
- Solid State Laser Technologies
- Plasmonic and Surface Plasmon Research
- Machine Learning in Materials Science
- Body Composition Measurement Techniques
- Advanced Photonic Communication Systems
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Glaucoma and retinal disorders
- Nuclear physics research studies
Technical University of Denmark
2018-2022
Sri Sathya Sai Institute of Higher Learning
2015-2022
Ørsted (Denmark)
2018-2021
Abstract We present the first demonstration of shot-noise limited supercontinuum-based spectral domain optical coherence tomography (SD-OCT) with an axial resolution 5.9 μm at a center wavelength 1370 nm. Current SD-OCT systems cannot be operated in detection regime because severe pulse-to-pulse relative intensity noise supercontinuum source. To overcome this disadvantage, we have developed low-noise source based on all-normal dispersion (ANDi) fiber, pumped by femtosecond laser. The...
Unlocking the true potential of optical spectroscopy on nanoscale requires development stable and low-noise laser sources. Here, we have developed a supercontinuum (SC) source based an all-normal dispersion fiber pumped by femtosecond demonstrate high resolution, spectrally resolved near-field measurements in near-infrared (NIR) region. Specifically, explore reduced-noise requirements for aperture-less scattering-type scanning microscopy (s-SNOM), including inherent pulse-to-pulse...
A pure silica photonic crystal fiber with a group velocity dispersion ($\beta_2$) of 4 ps$^2$/km at 1.55 $\mu$m and less than 7 from 1.32 to the zero wavelength (ZDW) 1.80 was designed fabricated. The measured experimentally found agree design, which also provides low loss below 1.83 due eight outer rings increased hole diameter. pumped $\mu$m, 125 fs laser and, maximum in-coupled peak power (P$_0$) 9 kW, 1.34$-$1.82 low-noise spectrum relative intensity noise 2.2\% measured. numerical...
In this paper we numerically study supercontinuum generation by pumping a silicon nitride waveguide, with two zero-dispersion wavelengths, femtosecond pulses. The waveguide dispersion is designed so that the pump pulse in normal-dispersion regime. We show because of self-phase modulation, initial broadens into anomalous-dispersion regime, which sandwiched between regimes, and here soliton formed. interaction broadened regime causes additional spectral broadening through formation dispersive...
Abstract We report the first proof-of-principle demonstration of resonant optical gyroscope with reflector that we have recently proposed. The device is very different from traditional gyroscopes since it uses inherent coupling between clockwise and counterclockwise propagating waves to sense rotation. Our confirms our theoretical analysis simulations. also demonstrate a novel method biasing using orthogonal polarization states. simplicity structure readout method, theoretically predicted...
We report on demonstration of high energy pulse laser at 2 μm by employing a normal dispersion fiber attained waveguide engineering. The has W-type refractive index profile, with Thulium(Tm)-doped core. In contrast to strong anomalous in step-index fiber, the design allows that can generate Tm emission band. Mode area scalability this is discussed under requirement. Tm-doped (TDF) deployed ring cavity produce mode-locked pulses near μm. Subsequently, amplified more than 27 dB gain through...
While the network traffic has seen exponential increase, revenues have not maintained same pace. New methods to be explored reduce this gap between and revenue. One such method is convergence in networking layers. In work, we study of OTN DWDM layer from a planning perspective. We compare costs networks without with show that multilayer offers least cost for higher volumes.
Intensity fluctuations in supercontinuum generation are studied polarization-maintaining (PM) and non-PM all-normal dispersion tellurite photonic crystal fibers. Dispersive Fourier transformation is used to resolve the shot-to-shot spectra generated using 225-fs pump pulses at 1.55 μm, with experimental results well reproduced by vector scalar numerical simulations. By comparing relative intensity noise for PM cases, supported simulations, we demonstrate advantage of property fibers...
The experimental mass data from the Atomic Mass Compilation - 2012 (AMC12) has been analyzed for two-neutron separation energies (S$_{2n}$), two-proton (S$_{2p}$), double-beta decay (Q$_{2\beta^-}$), and four-beta (Q$_{4\beta^-}$) plotted against neutron number number, respectively. A new weighted slope method of extrapolation, tested known measurements, used to obtain extrapolated values with better precision more than 1100 nuclei far valley stability, out which 100 are being reported first...
A pure silica holey fiber with β2 of 0.44 ps2/km at 1.55 μm and less than 1 from 1.3 to 1.75 was engineered drawn. It is numerically shown generate a flat coherent spectrum, pumped by 2 kW peak power, 250 fs pulse propagating 20 m.
We compare real-time noise measured using dispersive Fourier transform spectroscopy in supercontinuum generated PM and non-PM all-normal dispersion tellurite fibers show that fiber provides better stability higher coherence.
We present the first demonstration of shot-noise limited supercontinuum-based spectral domain optical coherence tomography (SD-OCT) with axial resolution 5.9 $μ$m at a center wavelength 1370 nm. Current SD-OCT systems cannot be operated in detection regime because severe pulse-to-pulse relative intensity noise supercontinuum source. To overcome this disadvantage we have developed low-noise source based on an all-normal dispersion (ANDi) fiber, pumped by femtosecond laser. The performance our...
We demonstrate surprising effects of technical pump laser fluctuations on the noise a normal-dispersion fs-pumped supercontinuum and how varies with power in fibers zero-dispersion at longer wavelengths.
Summary form only given. One of the requirements for generating a low noise supercontinuum (SC) in normal dispersion fiber using femtosecond (fs) pump is to have minimum absolute wavelength be close zero order avoid parametric Raman [1]. SC generation all-normal fibers can under certain provide highly coherent spectrum [2, 3], which key importance large range imaging and spectroscopy applications. Key from polarization mode instability (PMI) sufficiently peak power (P <sub...
We demonstrate surprising effects of technical pump laser fluctuations on the noise a normal-dispersion fs-pumped supercontinuum and how varies with power in fibers zero-dispersion at longer wavelengths.
A pure silica holey fiber with $\beta_2$ of 0.44 ps$^2$/km at 1.55 $\mu$m and less than 1 from 1.3 to 1.75 was engineered drawn. It is numerically shown generate a flat coherent spectrum, pumped by 2 kW peak power, 250 fs pulse propagating 20 m.
We demonstrate how the noise of normal-dispersion fs-pumped supercontinuum generation varies with power in fibers a zero-dispersion. When crosses into anomalous dispersion region localized noisy dispersive waves move through low-noise spectrum.