Publications by authors named "Benoît Boulanger"

29 Publications

  • Page 1 of 1

Development and experimental demonstration of negative first-order quasi-phase matching in a periodically poled Rb-doped KTiOPO crystal.

Opt Lett 2020 Nov;45(21):6026-6029

We worked on a new scheme of quasi-phase matching (QPM) based on the negative first order of the spatial modulation of the sign of the second-order nonlinearity. Applying this scheme in the case of angular-QPM (AQPM) in a biaxial crystal reveals new directions of propagation for efficient parametric frequency conversion as well as "giant" spectral acceptances. The experimental validation is performed in a periodically poled rubidium-doped biaxial crystal. This new approach naturally extends to other periodically poled uniaxial crystals such as periodically poled .
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http://dx.doi.org/10.1364/OL.408839DOI Listing
November 2020

Focus issue introduction: advanced solid-state lasers.

Opt Express 2019 Jul;27(15):20938-20941

This joint issue of Optics Express and Optical Materials Express features 28 state-of-the-art articles written by authors who participated in the international "Advanced Solid State Lasers" conference, held in Boston November 4-8, 2018. This review provides a summary of these articles that cover the spectrum of solid state lasers from materials research to sources and from design innovation to applications.
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http://dx.doi.org/10.1364/OE.27.020938DOI Listing
July 2019

Entangled-photon decision maker.

Sci Rep 2019 08 22;9(1):12229. Epub 2019 Aug 22.

Université Grenoble Alpes, CNRS, Institut Néel, 38042, Grenoble, France.

The competitive multi-armed bandit (CMAB) problem is related to social issues such as maximizing total social benefits while preserving equality among individuals by overcoming conflicts between individual decisions, which could seriously decrease social benefits. The study described herein provides experimental evidence that entangled photons physically resolve the CMAB in the 2-arms 2-players case, maximizing the social rewards while ensuring equality. Moreover, we demonstrated that deception, or outperforming the other player by receiving a greater reward, cannot be accomplished in a polarization-entangled-photon-based system, while deception is achievable in systems based on classical polarization-correlated photons with fixed polarizations. Besides, random polarization-correlated photons have been studied numerically and shown to ensure equality between players and deception prevention as well, although the CMAB maximum performance is reduced as compared with entangled photon experiments. Autonomous alignment schemes for polarization bases were also experimentally demonstrated based only on decision conflict information observed by an individual without communications between players. This study paves a way for collective decision making in uncertain dynamically changing environments based on entangled quantum states, a crucial step toward utilizing quantum systems for intelligent functionalities.
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http://dx.doi.org/10.1038/s41598-019-48647-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6706396PMC
August 2019

Validation of the angular quasi-phase-matching theory for the biaxial optical class using PPRKTP.

Opt Lett 2018 Sep;43(17):4276-4279

We report the first experimental validation of angular quasi-phase-matching (AQPM) theory in a biaxial crystal by performing second-harmonic generation (SHG) in the periodically-poled Rb-doped KTiOPO (PPRKTP) crystal cut as a sphere. Both AQPM and birefringence phase-matching (BPM) angles were measured thanks to a Kappa circle.
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http://dx.doi.org/10.1364/OL.43.004276DOI Listing
September 2018

Phase-matched second-harmonic generation in a flux grown KTP crystal ridge optical waveguide.

Opt Lett 2018 Aug;43(15):3770-3773

Type II second-harmonic generation was performed in a 15.8-mm-long KTiOPO (KTP) micrometric ridge waveguide with an average transversal section of 38  μm. Theoretical predictions are compared with experiments. Strong agreements are obtained for both phase-matching wavelengths and second-harmonic intensity. This work opens wide perspectives for integrated parametric optics.
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http://dx.doi.org/10.1364/OL.43.003770DOI Listing
August 2018

Feature issue introduction: Advanced Solid-State Lasers 2017.

Opt Express 2018 Apr;26(8):11018-11024

The Advanced Solid State Lasers 2017 Conference (ASSL) was held from October 1 to 5, 2017. It was an extraordinary conference at the Nagoya Congress Center in Nagoya, Japan. ASSL 2017 again suggested an impressive platform where miscellaneous perceptions with a variety of approaches to optics, photonics, sensing, laser technology, laser systems, and solid state lasers were presented. This international meeting was highly selective, leading to high level contributions through one plenary conference, 17 invited presentations, 70 regular talks, and 121 posters. The present joint issue of Optics Express and Optical Materials Express features 27 articles written by ASSL 2017 authors and covering the spectrum of solid-state lasers from materials research to sources, and from design innovation to applications.
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http://dx.doi.org/10.1364/OE.26.011018DOI Listing
April 2018

Quadratic nonlinear optical properties of the organic N-benzyl-2-methyl-4-nitroaniline (BNA) biaxial crystal.

Opt Lett 2018 Apr;43(8):1818-1821

We performed the direct measurement of second harmonic generation and sum frequency generation phase-matching directions in the organic N-benzyl-2-methyl-4-nitroaniline crystal over its visible and near-infrared transparency range. The fit of these data allowed us to refine the Sellmeier equations of the three principal refractive indices in this range. With these equations, we improved the calculated tuning curves of terahertz emission from a phase-matched difference frequency process. We also determined the absolute magnitude of the d nonlinear coefficient.
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http://dx.doi.org/10.1364/OL.43.001818DOI Listing
April 2018

Study of middle infrared difference frequency generation using a femtosecond laser source in LGT.

Opt Lett 2017 Sep;42(18):3698-3701

We demonstrate phase-matched difference frequency generation in the emerging nonlinear crystal LaGaTaO. Tunable wavelengths between 1.4 and 4.7 μm are generated by using femtosecond sources. We also report on the measurements of the optical damage threshold in the femtosecond regime and on the nonlinear refractive index n.
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http://dx.doi.org/10.1364/OL.42.003698DOI Listing
September 2017

Dielectric frame, Sellmeier equations, and phase-matching properties of the monoclinic acentric crystal GdCa4O(BO3)3.

Opt Lett 2016 Nov;41(22):5290-5293

We directly measured the phase-matching properties of the biaxial GdCa4O(BO3)3 (GdCOB) crystal using the sphere method. We studied second-harmonic generation and difference frequency generation in two principal planes of the crystal. All these data allowed us to refine the Sellmeier equations of the three principal refractive indices. These equations are valid over the entire transparency range of GdCOB and then could be used to calculate the tuning curves of infrared optical parametric generation.
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http://dx.doi.org/10.1364/OL.41.005290DOI Listing
November 2016

Acentric langanite La3Ga5.5Nb0.5O14 crystal: a new nonlinear crystal for the generation of mid-infrared parametric light.

Opt Express 2016 Aug;24(16):17603-15

The mid-infrared spectral range extending from 2 to 6 μm is significant for scientific and technological applications. A promising nonlinear oxide crystal La3Ga5.5Nb0.5O14 (LGN) is proposed and fully characterized for the first time to our knowledge. The transparency range extends between 0.28 and 7.4 μm. The two principal refractive indices were measured and we found that the nonlinear coefficient d11 = 3.0 ± 0.1 pm/V at 0.532 μm. The simultaneous fit of data allowed us to refine the Sellmeier equations of LGN and to calculate the tuning curves for optical parametric generation (OPG) pumped at 1.064 μm. Calculations are consistent with recorded data and also show the generation of a supercontinuum between 1.5 and 3.5 μm when pumped at 0.98 μm by a Ti:Sapphire laser.
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http://dx.doi.org/10.1364/OE.24.017603DOI Listing
August 2016

Phase-matching directions and refined Sellmeier equations of the monoclinic acentric crystal BaGa4Se7.

Opt Lett 2016 Jun;41(12):2731-4

We directly measured the phase-matching directions of second-harmonic and difference frequency generation in the principal planes of the biaxial BaGa4Se7 (BGSe) crystal using the sphere method. The simultaneous fit of the data allowed us to refine the Sellmeier equations of the three principal refractive indices of BGSe, and to calculate the tuning curves for infrared optical parametric generation.
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http://dx.doi.org/10.1364/OL.41.002731DOI Listing
June 2016

Angle noncritical phase-matched second-harmonic generation in the monoclinic crystal BaGa₄Se₇.

Opt Lett 2015 Oct;40(20):4591-4

We performed a complete study of angle noncritical phase-matched second-harmonic generation in BaGa4Se7 in the mid-infrared region. We measured the dielectric frame orientation and showed that it does not rotate as a function of wavelength. We determined the phase-matching wavelengths and the associated spectral and angular acceptances along the x and y axes of the dielectric frame. We also estimated the magnitude of the nonlinear coefficients involved.
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http://dx.doi.org/10.1364/OL.40.004591DOI Listing
October 2015

Anisotropy analysis of third-harmonic generation in a germanium-doped silica optical fiber.

Opt Lett 2015 Mar;40(6):982-5

We performed an intermodal third-harmonic generation around 516 nm in a germanium-doped silica optical fiber. The analysis of the complex polarization behavior that was observed allowed us to determine the orientation symmetry group of the fiber and the relative values of the independent coefficients of the third-order electric susceptibility tensor.
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http://dx.doi.org/10.1364/OL.40.000982DOI Listing
March 2015

Phase-matching directions, refined Sellmeier equations, and second-order nonlinear coefficient of the infrared Langatate crystal La₃Ga(5.5)Ta(0.5)O₁₄.

Opt Lett 2014 Jul;39(13):4033-6

We directly measured phase-matching directions of second harmonic, sum, and difference frequency generations in the Langatate La₃Ga(5.5)Ta(0.5)O₁₄ (LGT) uniaxial crystal. The simultaneous fit of the data enabled us to refine the Sellmeier equations of the ordinary and extraordinary principal refractive indices over the entire transparency range of the crystal, and to calculate the phase-matching curves and efficiencies of LGT for infrared optical parametric generation.
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http://dx.doi.org/10.1364/OL.39.004033DOI Listing
July 2014

Dual-wavelength source from 5%MgO:PPLN cylinders for the characterization of nonlinear infrared crystals.

Opt Express 2013 Nov;21(23):28886-91

We conceived a unique fully parametric source based on two independent cylindrical OPOs simultaneously pumped by the same Nd:YAG laser. Each OPO delivers more than 2 mJ and is continuously tunable between 1.41 µm and 4.3 µm. This source is of particular interest for the study of the generation of infrared parametric light in nonlinear crystals. It was validated by performing difference frequency generation experiments in CdSe crystals with output in the range 8 - 10 µm.
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http://dx.doi.org/10.1364/OE.21.028886DOI Listing
November 2013

Experimental demonstration of five-beam-pumped optical parametric amplification.

Opt Lett 2013 Sep;38(17):3319-21

CEA SACLAY, DSM IRAMIS, F-91191 Gif-sur-Yvette Cedex, France.

We experimentally demonstrated optical parametric amplification with five pumps coming from two different oscillators. By spreading those partially mutually incoherent pumps at 532 nm over different phase-matching directions around a signal at 725 nm, we obtained a pumps-to-signal efficiency of 27%.
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http://dx.doi.org/10.1364/OL.38.003319DOI Listing
September 2013

Widely tunable optical parametric oscillator in a 5 mm thick 5% MgO:PPLN partial cylinder.

Opt Lett 2013 Mar;38(6):860-2

Institut Néel Centre National de la Recherche Scientifique-Université Joseph Fourier, Grenoble, France.

A 5 mm thick and 38 mm long 5% MgO-doped periodically poled lithium niobate (MgO:PPLN) cylinder with a grating period of 28 μm has been engineered as a partial cylinder with an angular aperture of 45°. An optical parametric oscillator based on this crystal and pumped at 1.064 μm is reported. The output energy is comparable to that generated in the same kind of sample cut as a slab, but the wavelength tunability from 1.41 to 4.3 μm is much broader and continuous.
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http://dx.doi.org/10.1364/OL.38.000860DOI Listing
March 2013

Phase-matching loci and angular acceptance of non-collinear optical parametric amplification.

Opt Express 2012 Nov;20(24):26176-83

Commissariat à l’Energie Atomique CEA/DAM, CESTA, BP 2, F-33114 Le Barp, France.

A general study of phase-matching loci and associated angular acceptances is performed in the case of non-collinear parametric amplification. Numerical and analytical calculations, as well as measurements, are described for the uniaxial BBO crystal and the biaxial LBO crystal.
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http://dx.doi.org/10.1364/OE.20.026176DOI Listing
November 2012

Energetic and spectral properties of triple photon downconversion in a phase-matched KTiOPO4 crystal.

Opt Lett 2012 Jun;37(12):2334-6

Institut Néel Centre National de la Recherche Scientifique—Université Joseph Fourier, 25 rue des Martyrs, BP 166, F38402 Grenoble Cedex 9, France.

We measured the spectrum and energy of infrared triple photons generated in a phase-matched KTiOPO4 crystal pumped by picosecond beams at 532 and 1662 nm. The experimental data are in good agreement with our model, taking into account the spectral linewidths of the incident beams as well as a parasitic Kerr effect.
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http://dx.doi.org/10.1364/OL.37.002334DOI Listing
June 2012

Focus issue introduction: nonlinear optics.

Opt Express 2011 Nov;19(23):23561-6

Institut Néel CNRS Université Joseph Fourier, 38042 Grenoble Cedex 9, France.

It is now fifty years since the original observation of second harmonic generation ushered in the field of nonlinear optics, close on the heels of the invention of the laser. This feature issue celebrates this anniversary with papers that span the range from new nonlinear optical materials, through the increasingly novel methods that have been developed for phase matching, to emerging areas such as nonlinear metamaterials and plasmonic enhancement of optical properties. It is clear that the next fifty years of nonlinear optics will witness a proliferation of new applications with increasing technological impact.
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http://dx.doi.org/10.1364/OE.19.023561DOI Listing
November 2011

Phase-matching properties and refined Sellmeier equations of the new nonlinear infrared crystal CdSiP2.

Opt Lett 2011 May;36(10):1800-2

Institut Néel Centre National de la Recherche Scientifique - Université Joseph Fourier, 25 Rue des Martyrs, BP 166, F38402 Grenoble Cedex 9, France.

We directly measured the second harmonic generation and difference frequency generation phase-matching directions of the nonlinear crystal CdSiP(2) until 9.5 μm using the sphere method. The simultaneous fit of the experimental angular data allowed the Sellmeier equations of the ordinary and extraordinary principal refractive indices to be refined over the entire transparency range of the crystal.
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http://dx.doi.org/10.1364/OL.36.001800DOI Listing
May 2011

Rotation of the absorption frame as a function of the electronic transition in the Nd3+:YCa₄O(BO₃)₃ monoclinic crystal.

Opt Express 2010 Aug;18(18):19169-74

Institut Néel CNRS/UJF, 25 rue des Martyrs, BP 166, F38402 Grenoble Cedex 9, France.

We report the first measurements of the angular distribution of absorption under polarized light corresponding to seven electronic transitions of Nd(3+) ions in the monoclinic crystal Nd:YCOB, revealing a rotation of the symmetry axes of the different patterns.
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http://dx.doi.org/10.1364/OE.18.019169DOI Listing
August 2010

Singular topology of optical absorption in biaxial crystals.

Opt Express 2009 Oct;17(22):19868-73

Institut Néel CNRS/UJF, 25 rue des Martyrs, BP 166, F38402 Grenoble Cedex 9 France.

We show for the first time that biaxial crystals exhibit continua of directions of propagation where the absorption coefficient is the same for the two associated polarization modes. This statement is supported by both calculations and experimental data obtained in Nd:YCOB.
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http://dx.doi.org/10.1364/OE.17.019868DOI Listing
October 2009

Angular quasi-phase-matching experiments and determination of accurate Sellmeier equations for 5%MgO:PPLN.

Opt Lett 2009 Sep;34(17):2578-80

Institut Néel CNRS/UJF, 25 rue des Martyrs, BP 166, F38402 Grenoble Cedex 9, France.

We validated the theory of angular quasi-phase-matching (AQPM) by performing measurements of second-harmonic generation and difference-frequency generation. A nonlinear least-squares fitting of these experimental data led to refine the Sellmeier equations of 5%MgO:PPLN that are now valid over the complete transparency range of the crystal. We also showed that AQPM exhibits complementary spectral ranges and acceptances compared with birefringence phase matching.
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http://dx.doi.org/10.1364/OL.34.002578DOI Listing
September 2009

Absorption and fluorescence anisotropies of monoclinic crystals: the case of Nd:YCOB.

Opt Express 2008 May;16(11):7997-8002

Institut Néel CNRS/UJF, 25 rue des Martyrs, BP 166, F38402 Grenoble Cedex 9, France.

We report for the first time measurements and modelization of the angular distributions of absorption and fluorescence in a monoclinic crystal. Studies on Nd:YCOB revealed specific topologies with ombilics. These new data upgrade the knowledge on low symmetry crystal optics.
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http://dx.doi.org/10.1364/oe.16.007997DOI Listing
May 2008

Yb(3+) spectroscopy in (Nb or Ta):RbTiOPO(4) single crystals for laser applications.

Opt Express 2007 Oct;15(22):14580-90

Single crystals of Yb:RbTiOPO(4) codoped with Nb(5+) or Ta(5+) were grown by the top seeded solution growth slow-cooling technique. The ytterbium concentration in the crystals varies as a function of the molar ratio of the precursor oxides and of the codopant, reaching a maximum value of 1.9x10(20) Yb(3+) ions/cm(3). The broad band near 1 mum in absorption and emission spectra at room temperature is due to the large splitting of the Yb(3+) ground state. The ytterbium (2)F(5/2) level radiative lifetime in Nb:RbTiOPO(4) (tau(rad) = 2.7 ms), was calculated and then compared to the measured fluorescence decay time (tau(em) = 2.2 ms), giving an intrinsic quantum efficiency of 81%. To evaluate the potentiality of these crystals for self-frequency doubling, preliminary results of Yb(3+) laser operation and fundamental wavelength measurements for type-II non-critical second harmonic generation ( lambda(NCPM)) are also reported.
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http://dx.doi.org/10.1364/oe.15.014580DOI Listing
October 2007

Laser operation of Yb3+ in the acentric RbTiOPO4 codoped with Nb5+.

Opt Lett 2007 Jul;32(13):1929-31

Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy, 2A Max-Born-Strasse, D-12489 Berlin, Germany.

We report on continuous-wave lasing of Yb(3+) at room temperature in the noncentrosymmetric RbTiOPO(4) crystal, codoped with Nb(5+), for all three possible polarizations. A maximum output power of 154 mW at 1050 nm was obtained for an absorbed power of 386 mW. The highest slope efficiency reached approximately 60% and the lowest threshold (with respect to the absorbed power) was 18 mW. The laser was tunable from 1009 to 1081 nm.
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http://dx.doi.org/10.1364/ol.32.001929DOI Listing
July 2007

Cubic parametric frequency generation in rutile single crystal.

Opt Express 2006 Nov;14(24):11715-20

We experimentally investigated third harmonic generation in TiO(2) rutile single crystal, including phase-matching and cubic nonlinearity. We refined the dispersion equations of rutile and we demonstrated that this crystal allows angular non critical phase-matching at useful wavelengths, with a figure of merit 7.5 times that of KTiOPO(4). The measured cubic non linear coefficient and the corresponding Miller coefficients are : chi(16) =5.0x10(-21) m(2/)V(2) at 613.2 nm and Delta16 = 3.5x10(-24) m(2/)V(2). These results are used to predict the phase-matching conditions and the efficiency of triple photon generation in rutile.
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http://dx.doi.org/10.1364/oe.14.011715DOI Listing
November 2006

Continuous tuning of a microlaser-pumped optical parametric generator by use of a cylindrical periodically poled lithium niobate crystal.

Opt Lett 2003 Jun;28(12):1028-30

Laboratoire de Spectrométrie Physique, 140 Avenue de la Physique, BP 87, 38402 Saint Martin d'Heres, France.

An optical parametric generator with a cylindrical periodically poled LiNbO3 crystal and a Nd:YAG commercial microchip pump laser yields continuous tuning of the emitted wavelengths over a broad spectral range (1.42-1.7 microm and 2.8-4.2 microm), with large efficiency, a high repetition rate, and low divergence, in a compact and stable device.
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http://dx.doi.org/10.1364/ol.28.001028DOI Listing
June 2003