Papers by Konstantin Vodopyanov
Gallium arsenide (GaAs) is a highly promising material for mid-infrared frequency conversion beca... more Gallium arsenide (GaAs) is a highly promising material for mid-infrared frequency conversion because of its broad infrared transparency range (λ = 0.9-17 µm), large nonlinear susceptibility (d14 = 94 pm/V around λ = 4 µm), and high thermal conductivity. The high symmetry in GaAs, in both its nonlinear susceptibility and its linear optical properties, leads to interesting polarization behavior. Usually,
We demonstrate 4.8-8.5-micron infrared continuum from an optical parametric generator (OPG) based... more We demonstrate 4.8-8.5-micron infrared continuum from an optical parametric generator (OPG) based on quasi-phasematched GaAs pumped by 1-ps pulses near 3.3 microns. The OPG pump threshold was about 100nJ and conversion efficiency greater than 10%.
We implement a new approach for creating broadband mid-infrared frequency combs via degenerate di... more We implement a new approach for creating broadband mid-infrared frequency combs via degenerate divide-by-2 optical parametric oscillator. It was pumped by a 1560-nm femtosecond Er-fiber laser and produced > 1000-nm-wide frequency comb centered at 3.1µm.
2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC, 2013
ABSTRACT Accurate measurements of group delay (GD) and group delay dispersion (GDD) characteristi... more ABSTRACT Accurate measurements of group delay (GD) and group delay dispersion (GDD) characteristics play a crucial role in achieving top performance of ultra-fast optical systems based on dispersive mirrors (DM). Currently GD and GDD measurements are typically performed with white-light interferometers (WLI). However, the resolution and accuracy of WLI is not sufficient for many present-day challenging applications, especially in cases when ultra-broadband spectrum spanning over more than an optical octave is considered, or very high levels of dispersion need to be controlled. An alternative approach for GD and GDD measurements based on inter-mirror cavity resonances was developed. The idea to use setups similar to Fabry-Pérot and Gires-Tournois interferometers for this purpose was initially proposed in. In that work a single measurement with a fixed spacer thickness was performed. In order to increase the spectral resolution, it was necessary to increase the spacer thickness. However, that caused a rapid decrease of the measured signal level and soon the resonance peaks became masked by unavoidable noise. A “golden middle” spacer thickness often was unable to provide a good balance between resolution and signal-to-noise ratio. In contrast, this paper carried out measurements at a set of different spacer thicknesses, then the acquired data was combined together and processed using a regularization theory of the solution of inverse problems.
2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEOPR), 2013
Journal of visualized experiments : JoVE, 2013
Supercontinuum generation (SCG) in a tapered chalcogenide fiber is desirable for broadening mid-i... more Supercontinuum generation (SCG) in a tapered chalcogenide fiber is desirable for broadening mid-infrared (or mid-IR, roughly the 2-20 μm wavelength range) frequency combs(1, 2) for applications such as molecular fingerprinting, (3) trace gas detection, (4) laser-driven particle acceleration, (5) and x-ray production via high harmonic generation. (6) Achieving efficient SCG in a tapered optical fiber requires precise control of the group velocity dispersion (GVD) and the temporal properties of the optical pulses at the beginning of the fiber, (7) which depend strongly on the geometry of the taper. (8) Due to variations in the tapering setup and procedure for successive SCG experiments-such as fiber length, tapering environment temperature, or power coupled into the fiber, in-situ spectral monitoring of the SCG is necessary to optimize the output spectrum for a single experiment. In-situ fiber tapering for SCG consists of coupling the pump source through the fiber to be tapered to a s...
Optics express, Jan 25, 2013
We developed a method for group delay and group delay dispersion measurements, based on location ... more We developed a method for group delay and group delay dispersion measurements, based on location of interference resonance peaks. Such resonance peaks can be observed in transmittance or in reflectance when two mirrors are placed parallel to each other and separated by a thin air spacer. By using a novel approach, based on simultaneous processing of the data acquired for different spacer distances we obtained reliable results with high resolution. Measurements were performed both in transmittance and reflectance layouts depending on the reflectivity of the mirror to be measured. The developed method allows dispersion measurements of ultraviolet mirrors and ultra-broadband mirrors spanning more than one optical octave to be performed.
Solid State Laser Technologies and Femtosecond Phenomena, 2004
We demonstrate an optical parametric oscillator (OPO) based on GaAs. The OPO utilized an all-epit... more We demonstrate an optical parametric oscillator (OPO) based on GaAs. The OPO utilized an all-epitaxially-grown orientation-patterned GaAs (OP-GaAs) crystal, 0.5-mm-thick, 5-mm-wide, and 11-mm-long, with a domain reversal period of 61.2 mum. By tuning either the near-IR pump wavelength between 1.75 and 2 mum, or the temperature of the GaAs crystal, the mid-IR output tuned between 2 and 11 mum, limited
Integrated Optics: Devices, Materials, and Technologies IX, 2005
We demonstrate an optical parametric oscillator (OPO) based on GaAs. The OPO utilized an all-epit... more We demonstrate an optical parametric oscillator (OPO) based on GaAs. The OPO utilized an all-epitaxially-grown orientation-patterned GaAs (OP-GaAs) crystal, 0.5-mm-thick, 5-mm-wide, and 11-mm-long, with a domain reversal period of 61.2 microns. By tuning either the near-IR pump wavelength between 1.75 and 2 microns, or the temperature of the GaAs crystal, the mid-IR output tuned between 2 and 11 microns, limited
2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC, 2013
We demonstrate mid-infrared (mid-IR) supercontinuum generation (SCG) with instantaneous bandwidth... more We demonstrate mid-infrared (mid-IR) supercontinuum generation (SCG) with instantaneous bandwidth from 2.2 to 5 μm at 40 dB below the peak, covering the wavelength range desirable for molecular spectroscopy and numerous other applications. The SCG occurs in a tapered As(2)S(3) fiber prepared by in-situ tapering and is pumped by femtosecond pulses from the subharmonic of a mode-locked Er-doped fiber laser. Interference with a narrow linewidth c.w. laser verifies that the coherence properties of the near-IR frequency comb have been preserved through these cascaded nonlinear processes. With this approach stable broad mid-IR frequency combs can be derived from commercially available near-IR frequency combs without an extra stabilization mechanism.
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIII, 2014
ABSTRACT We demonstrate the continuous-wave operation of a cascade that has been successfully app... more ABSTRACT We demonstrate the continuous-wave operation of a cascade that has been successfully applied so far only for picosecond systems: A doubly-resonant optical-parametric oscillator (OPO) based on lithium niobate generates signal and idler waves close to degeneracy. Subsequently, these two light fields are converted to a terahertz wave via difference frequency mixing in an orientation-patterned gallium arsenide crystal placed inside the OPO cavity. Using this scheme, we achieved tunability from 1 to 4:5 THz frequency, a linewidth smaller than 10 MHz, and a Gaussian beam profile. The output power is of the order of tens of μW, with a scalability into the milliwatt regime.
Lasers, Sources, and Related Photonic Devices, 2012
ABSTRACT We extend broadband degenerate OPO operation further into the mid-infrared using a thuli... more ABSTRACT We extend broadband degenerate OPO operation further into the mid-infrared using a thulium fiber laser to pump orientation-patterned GaAs. Pump threshold is less than 20mW and output exceeds 30mW over a bandwidth of 3.1-5.8 µm.
Conference on Lasers and Electro-Optics 2012, 2012
ABSTRACT We use a degenerate OPO pumped by an ultrafast 2050-nm Tm-fiber laser to generate a broa... more ABSTRACT We use a degenerate OPO pumped by an ultrafast 2050-nm Tm-fiber laser to generate a broadband mid-infrared comb. A GaAs gain element and dispersion management access an ∼octave-wide output spectrum extending from 3.1 to 5.9μm
2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC), 2011
ABSTRACT
Conference on Lasers and Electro-Optics 2010, 2010
... Lett. 34, 1330-1332 (2009). 11. D. Brida, C. Manzoni, G. Cirmi, M. Marangoni, S. DeSilvestri,... more ... Lett. 34, 1330-1332 (2009). 11. D. Brida, C. Manzoni, G. Cirmi, M. Marangoni, S. DeSilvestri, and G. Cerullo, "Generation of broadband mid-infrared pulses from an opticalparametric amplifier," Opt. Express 15, 15035-15040 (2007). 12. ...
CLEO:2011 - Laser Applications to Photonic Applications, 2011
Abstract Recent results using a degenerate OPO pumped by a 1560nm ultrafast laser to generate a b... more Abstract Recent results using a degenerate OPO pumped by a 1560nm ultrafast laser to generate a broadband mid-infrared comb. Dispersion management and FTIR detection techniques access an octave-wide output spectrum extending from 2.0 to 4.0 um.
Frontiers in Optics 2010/Laser Science XXVI, 2010
... Lett. 34, 1330-1332 (2009). 9. D. Brida, C. Manzoni, G. Cirmi, M. Marangoni, S. DeSilvestri, ... more ... Lett. 34, 1330-1332 (2009). 9. D. Brida, C. Manzoni, G. Cirmi, M. Marangoni, S. DeSilvestri, and G. Cerullo, "Generation of broadband mid-infrared pulses from an opticalparametric amplifier," Opt. Express 15, 15035-15040 (2007). 10. ...
CLEO:2011 - Laser Applications to Photonic Applications, 2011
... Since all the modes are seeded with the same phase reference with respect to the pump, it is ... more ... Since all the modes are seeded with the same phase reference with respect to the pump, it is guaranteed that the modes are phase-and frequency locked. Theoretical background on the phase locking, phase OSA/ CLEO 2011 QTuF2.pdf ... (e) OSA/ CLEO 2011 QTuF2.pdf
Conference on Lasers and Electro-Optics 2012, 2012
ABSTRACT We demonstrate a near-octave-wide mid-IR spectrum from a tapered As2S3 fiber pumped by f... more ABSTRACT We demonstrate a near-octave-wide mid-IR spectrum from a tapered As2S3 fiber pumped by femtosecond pulses near 3 μm, with the potential of producing broadband frequency combs desirable for molecular spectroscopy and numerous other applications.
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XI, 2012
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Papers by Konstantin Vodopyanov