Prof. Niculae N. Puscas Profile

Prof. Niculae N. Puscas

Prof. Dr. PhD at Univ Politehnica of Bucharest

SPIE Involvement:

Author

Publications (49)

SPIE Journal Paper | 10 July 2019

Enhanced plasmonic biosensors based on microstructured optical fibers

Guido Perrone, Vasile Popescu, Niculae Puscas

OE, Vol. 58, Issue 07, 072013, (July 2019) https://doi.org/10.1117/12.10.1117/1.OE.58.7.072013

KEYWORDS: Plasmonics, Refractive index, Plasmons, Biosensors, Micro optical fluidics, Structured optical fibers, Optical fibers, Gold, Sensors, Signal to noise ratio

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Proceedings Article | 31 December 2018 Paper

High nonlinear behavior of optical reflectivity in surface plasmon resonance structures which contain amorphous As2S3 thin films

Aurelian Popescu, Dan Savastru, Mihai Stafe, Niculae Puscas

Proceedings Volume 10977, 1097708 (2018) https://doi.org/10.1117/12.2323625

KEYWORDS: Refractive index, Chalcogenides, Reflectivity, Nonlinear optics, Prisms, Waveguides, Plasmonics, Thin films, Surface plasmons, Waveguide modes

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Proceedings Article | 5 March 2015 Paper

Design and fabrication of disposable plasmonic fiber probes for biosensing

P. Dhara, C. Fallauto, Andrea Braglia, M. Olivero, V. Popescu, N. Puscas, A. Vallan, V. Singh, G. Perrone

Proceedings Volume 9317, 93170T (2015) https://doi.org/10.1117/12.2078157

KEYWORDS: Gold, Plasmons, Sensors, Refractive index, Fiber optics sensors, Cladding, Water, Structured optical fibers, Metals, Biosensing

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Proceedings Article | 20 February 2015 Paper

Numerical simulations of surface plasmon resonances in metal-chalcogenide waveguides

Mihai Stafe, Georgiana Vasile, Aurelian Popescu, Dan Savastru, Laurentiu Baschir, Mona Mihailescu, Constantin Negutu, Niculae Puscas

Proceedings Volume 9258, 92582H (2015) https://doi.org/10.1117/12.2070182

KEYWORDS: Waveguides, Wave propagation, Chalcogenides, Radio propagation, Surface plasmons, Metals, Magnetism, Numerical simulations, Dispersion, Plasmonics

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Proceedings Article | 1 November 2012 Paper

A spectroscopic and theoretical study of the laser ablation rate of Al

M. Stafe, C. Negutu, A. Ducariu, N. Puscas

Proceedings Volume 8411, 841129 (2012) https://doi.org/10.1117/12.973753

KEYWORDS: Laser ablation, Plasma, Spectroscopy, Aluminum, Electrons, Pulsed laser operation, Laser damage threshold, Laser processing, Laser energy, Attenuators

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Proceedings Article | 1 November 2012 Paper

Characterization of canine oocytes using absorption/transmission measurements

Georgiana Vasile, Ion Alin Bîrţoiu, Ion-Mihai Vasile, Mona Mihăilescu, Niculae Puşcaş

Proceedings Volume 8411, 841105 (2012) https://doi.org/10.1117/12.970638

KEYWORDS: Refractive index, Optical fibers, Ovary, Spectroscopy, Ocean optics, Sensors, Fiber couplers, Matrices, Medicine, Argon ion lasers

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Proceedings Article | 4 December 2010 Paper

Characterization of Er3+:Ti:LiNbO3 and Ti:LiNbO3 optical waveguides using near-field measurements

G. Vasile, N. Puscas

Proceedings Volume 7821, 78210Q (2010) https://doi.org/10.1117/12.881683

KEYWORDS: Waveguides, Near field, Erbium, Infrared cameras, Cameras, Optical fibers, Waveguide modes, Infrared radiation, Deconvolution, CCD cameras

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Proceedings Article | 4 December 2010 Paper

Effect of pulse number on the ablation rate of metals in PLA multi-pulse regime

C. Negutu, I. Vladoiu, M. Stafe, A. Rizea, N. Puscas, I. Popescu

Proceedings Volume 7821, 78210G (2010) https://doi.org/10.1117/12.882105

KEYWORDS: Laser ablation, Aluminum, Copper, Titanium, Ultraviolet radiation, Plasma, Metals, Pulsed laser operation, Superposition, Signal attenuation

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Proceedings Article | 4 December 2010 Paper

Evaluation of some optical parameters which characterize the Er3+ :LiNbO3 optical waveguides

D. Dinu, S. Dontu, L. Puscas, N. Puscas

Proceedings Volume 7821, 78210I (2010) https://doi.org/10.1117/12.881684

KEYWORDS: Absorption, Waveguides, Erbium, Hassium, Optoelectronics, Visible radiation, Near infrared, Spectroscopy, Ions, Physics

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Proceedings Article | 17 May 2010 Paper

Spectroscopic study of the plasmas generated by nanosecond laser ablation of Er3+-doped Ti:LiNbO3 targets

M. Stafe, C. Negutu, I. Vladoiu, S. Ciobanu, B. Savu, N. Puscas

Proceedings Volume 7469, 746907 (2010) https://doi.org/10.1117/12.858813

KEYWORDS: Plasmas, Laser ablation, Lithium, Spectroscopy, Chemical species, Atmospheric plasma, Confocal microscopy, Solids, Optical microscopy, Visible radiation

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Proceedings Article | 17 May 2010 Paper

Modeling of the Er3+-doped Ti:LiNbO3 optical waveguide couplers

N. Puscas, S. Ciobanu, C. Negutu, M. Stafe

Proceedings Volume 7469, 74690W (2010) https://doi.org/10.1117/12.858812

KEYWORDS: Waveguides, Signal to noise ratio, Directional couplers, Polarization, Interference (communication), Diffusion, Crystals, Erbium, Optical amplifiers, Modeling

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Proceedings Article | 7 January 2009 Paper

Modelling of the Bragg gratings fabricated on Er3+-doped Ti:LiNbO optical waveguides

L. Puscas, E. Rotar, R. Galatus, N. Puscas

Proceedings Volume 7297, 72971E (2009) https://doi.org/10.1117/12.823661

KEYWORDS: Modulation, Fiber Bragg gratings, Waveguides, Diffraction, Refractive index, Reflectivity, Erbium, Diffraction gratings, Modeling, Telecommunications

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Proceedings Article | 17 October 2007 Paper

Characterization and modelling of an improved method of phase detection scheme for displacement optic sensors

N. Puscas, H. Gnewuch, D. Jackson, A. Gh. Podoleanu

Proceedings Volume 6744, 67442L (2007) https://doi.org/10.1117/12.738363

KEYWORDS: Signal to noise ratio, Distance measurement, Modulation, Semiconductor lasers, Sensors, Phase shift keying, Signal processing, Signal generators, Interference (communication), Receivers

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Proceedings Article | 1 August 2007 Paper

Modelling and evaluation of some spectroscopic parameters of Er3+ and Yb3+-doped LiNbO3 optical waveguide amplifiers

Georgiana Constantin, N. Puscas, I. Popescu

Proceedings Volume 6785, 678505 (2007) https://doi.org/10.1117/12.755491

KEYWORDS: Erbium, Absorption, Ytterbium, Waveguides, Ions, Optical amplifiers, Oscillators, Modeling, Spectroscopy, Laser development

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Proceedings Article | 1 August 2007 Paper

Theoretical analysis of the spectral gain and noise of single and double pass Er³⁺-doped Ti:LiNbO₃ straight waveguide amplifiers

B. Savu, N. Puscas

Proceedings Volume 6785, 678516 (2007) https://doi.org/10.1117/12.757911

KEYWORDS: Signal to noise ratio, Waveguides, Optical amplifiers, Erbium, Interference (communication), Fiber amplifiers, Diffusion, Integrated optics, Crystals, Thulium

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Proceedings Article | 9 May 2007 Paper

Evaluation of the attenuation and the optical coupling between optical fibers and waveguides

S. Ghinoiu, L. Puscas, E. Rotaru, R. Galatus, N. Puscas

Proceedings Volume 6635, 66351D (2007) https://doi.org/10.1117/12.742123

KEYWORDS: Optical fibers, Waveguides, Signal attenuation, Near field optics, Near field, Receivers, Resonators, Transmittance, Optical testing, Integrated optics

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Proceedings Article | 8 May 2007 Paper

Analysis of conversion efficiency of internal second-harmonic generation in InGaAs quantum-well laser diodes emitting around 960 nm

F. Puntaru, N. Puscas

Proceedings Volume 6635, 66350S (2007) https://doi.org/10.1117/12.741917

KEYWORDS: Semiconductor lasers, Second-harmonic generation, Indium gallium arsenide, Nonlinear optics, Waveguides, Waveguide lasers, Harmonic generation, Quantum wells, Wave propagation, Numerical integration

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Proceedings Article | 18 April 2006 Paper

The modelling and calculation of some characteristic parameters of Er³⁺:LiNbO₃ optical waveguides

N. Puscas, I. Popescu

Proceedings Volume 6180, 61800M (2006) https://doi.org/10.1117/12.675661

KEYWORDS: Absorption, Waveguides, Erbium, Oscillators, Upconversion, Probability theory, Semiconductor lasers, Ions, Modeling, Spectroscopy

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Proceedings Article | 14 December 2005 Paper

Modelling and evaluation of some spectroscopic parameters of Er3+-doped LiNbO3 optical waveguides

N. Puscas

Proceedings Volume 5972, 59721A (2005) https://doi.org/10.1117/12.639774

KEYWORDS: Absorption, Waveguides, Oscillators, Modeling, Spectroscopy, Laser optics, Transition metals, Erbium, Optical amplifiers, Fourier transforms

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Proceedings Article | 14 December 2005 Paper

Theoretical analysis of the mechanical system for a fiber optic seismic sensor

E. Smeu, N. Puscas

Proceedings Volume 5972, 59720X (2005) https://doi.org/10.1117/12.639743

KEYWORDS: Sensors, Earthquakes, Fiber optics, Fiber optics sensors, Seismic sensors, Interferometry, Numerical simulations, Differential equations, Signal to noise ratio, Fiber Bragg gratings

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Proceedings Article | 14 December 2005 Paper

Theoretical analysis of photon statistics on excited number of modes and dopant concentration in Er3+:Ti:LiNbO3 waveguide amplifiers

A. Ducariu, G. Constantin, N. Puscas

Proceedings Volume 5972, 59721B (2005) https://doi.org/10.1117/12.639775

KEYWORDS: Waveguides, Erbium, Optical amplifiers, Ions, Amplifiers, Polarization, Statistical analysis, Crystals, Diffusion, Photonic crystals

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Proceedings Article | 21 October 2004 Paper

Modeling of optical amplification on dopant concentration in the bent Er-doped LiNbO waveguide of the Mach-Zehnder interferometer

George Valceanu, Niculae Puscas, Adrian Ducariu, Emil Smeu, Ion Popescu

Proceedings Volume 5581, (2004) https://doi.org/10.1117/12.583040

KEYWORDS: Waveguides, Signal to noise ratio, Erbium, Mach-Zehnder interferometers, Interference (communication), Diffusion, Integrated optics, Refractive index, Ions, Optical amplifiers

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Proceedings Article | 30 September 2003 Paper

Analysis of phase matching for the internal second-harmonic generation in InGaAs quantum-well laser diodes emitting around 980 nm

M. Frunza, Niculae Puscas, Emil Smeu, Ion Popescu, Grigore Suruceanu

Proceedings Volume 5227, (2003) https://doi.org/10.1117/12.519900

KEYWORDS: Semiconductor lasers, Second-harmonic generation, Indium gallium arsenide, Waveguides, Nonlinear optics, Spectroscopy, Waveguide lasers, Harmonic generation, Quantum wells, Wave propagation

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Proceedings Article | 8 July 2003 Paper

Modeling the gain and photon statistics of single- and double-pass Er3+-doped Ti:LiNbO3 M-mode straight waveguide amplifiers

Niculae Puscas, Ion Popescu

Proceedings Volume 5036, (2003) https://doi.org/10.1117/12.498531

KEYWORDS: Waveguides, Optical amplifiers, Erbium, Polarization, Information operations, Integrated optics, Statistical analysis, Statistical modeling, Crystals, Physics

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Proceedings Article | 9 August 2002 Paper

Analysis of optical amplification on dopant concentration in Er3+:Ti:LiNbO3 waveguides

George Valceanu, Adrian Ducariu, Niculae Puscas, Ion Popescu

Proceedings Volume 4762, (2002) https://doi.org/10.1117/12.478635

KEYWORDS: Waveguides, Signal to noise ratio, Erbium, Optical amplifiers, Ions, Interference (communication), Crystals, Optical simulations, Quantum optics, Polarization

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Proceedings Article | 29 June 2001 Paper

Modeling the optical gain and noise in the bent Er3+-doped LiNbO3 waveguide of the Mach-Zehnder interferometer

Niculae Puscas, Adrian Ducariu, Lucian Ene

Proceedings Volume 4430, (2001) https://doi.org/10.1117/12.432878

KEYWORDS: Waveguides, Erbium, Mach-Zehnder interferometers, Optical amplifiers, Diffusion, Photons, Crystals, Refractive index, Interference (communication), Integrated optics

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Proceedings Article | 29 June 2001 Paper

Fabrication and characterization of Bragg gratings in Er-Yb-doped glass waveguides using interferometric method

M. Florea, Jean-Emmanuel Broquin, Sylvain Blaize, Niculae Puscas

Proceedings Volume 4430, (2001) https://doi.org/10.1117/12.432884

KEYWORDS: Waveguides, Glasses, Interferometry, Fiber Bragg gratings, Semiconducting wafers, Ions, Lithium, LabVIEW, Data acquisition, Calibration

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Proceedings Article | 29 June 2001 Paper

Analysis of the maximum refractive index difference profile of optical waveguides obtained by double ion exchange in glass

Niculae Puscas

Proceedings Volume 4430, (2001) https://doi.org/10.1117/12.432885

KEYWORDS: Refractive index, Waveguides, Glasses, Ion exchange, Silver, Modeling, Diffusion, Ions, Optical design, Integrated optics

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Proceedings Article | 29 June 2001 Paper

Analysis of phase-matching conditions for internal second-harmonic generation in InGaAs quantum well laser diodes

M. Frunza, Emil Smeu, Niculae Puscas, Ion Popescu, Grigore Suruceanu

Proceedings Volume 4430, (2001) https://doi.org/10.1117/12.432886

KEYWORDS: Second-harmonic generation, Semiconductor lasers, Indium gallium arsenide, Waveguides, Nonlinear optics, Waveguide lasers, Quantum wells, Spectroscopy, Wave propagation, Crystals

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Proceedings Article | 29 June 2001 Paper

Characterization of upconversion phenomena in Er3+-doped Ti:LiNbO3 waveguides using the fluorescence around 550 nm

Niculae Puscas, Bruno Wacogne, Vincent Voinot, Richard Ferriere

Proceedings Volume 4430, (2001) https://doi.org/10.1117/12.432870

KEYWORDS: Upconversion, Waveguides, Erbium, Luminescence, Absorption, Ions, Photons, Polarization, Semiconductor lasers, Laser optics

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Proceedings Article | 23 February 2000 Paper

Analysis of the third order harmonic generation process in optical organic waveguides

Niculae Puscas

Proceedings Volume 4068, (2000) https://doi.org/10.1117/12.378705

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Proceedings Article | 23 February 2000 Paper

Evaluation of some nonlinear parameters of Er3+:Ti:LiNbO3 waveguides from interferometric and near-field measurements

Niculae Puscas

Proceedings Volume 4068, (2000) https://doi.org/10.1117/12.378676

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