Ming-feng Shih - Academia.edu (original) (raw)
Papers by Ming-feng Shih
Tuning of second harmonic generation in soliton-induced waveguides
We have demonstrated that photorefractive soliton-induced waveguides can improve the SHG conversi... more We have demonstrated that photorefractive soliton-induced waveguides can improve the SHG conversion efficiency considerably while offering tuning angle range of ±7°, which translates into 4 nanometer tunability. We expect much higher improvement with a longer crystal and a narrower soliton
Four-Wave Mixing of Vector Solitons
Interactions between two vector solitons can be described by two coupled nonlinear wave eqs :
Self-Trapping of Partially Spatially Incoherent Light Beams
Optics & Photonics News, Dec 1, 1996
ABSTRACT
Complex Nonlinear Opto-Fluidics
We demonstrate symbiotic dynamics of light and nano-particles suspended in liquid. The light-forc... more We demonstrate symbiotic dynamics of light and nano-particles suspended in liquid. The light-force varies the local particle-density, modifies the fluid properties (surface-tension, viscosity), inducing flow in the fluid, causing synergetic nonlinear-dynamics of light and fluid.
Physical review, May 1, 1996
We study one-dimensional steady-state photorefractive screening solitons in a bulk strontium bari... more We study one-dimensional steady-state photorefractive screening solitons in a bulk strontium barium niobate crystal. We compare measurements and calculations of the soliton properties and find good agreement for relations between the profile, width and intensity of the soliton, the applied voltage and material parameters. We find the solitons stable against perturbations both in the plane and perpendicular to the plane of the soliton for intensities large compared to the background intensity. ͓S1063-651X͑96͒50505-2͔
Journal of Crystal Growth, Mar 1, 2005
The zone-levelling Czochralski (ZLCz) technique was used to grow MgO-doped near-stoichiometric li... more The zone-levelling Czochralski (ZLCz) technique was used to grow MgO-doped near-stoichiometric lithium niobate (SLN) crystals for the first time. The crystal was pulled from a Li-rich solution (58-60 mol% of Li 2 O) having an SLN solid supplied from below in a slender platinum crucible. An inner crucible was also used to avoid bubble incorporation. With 1 mol% MgO doping, three inclusion-free SLN crystals were grown. The transmittance along the grown crystals was found satisfactory (7671%) having an absorption edge of 30371 nm. The small variation of the composition (Li/Nb ¼ 0.97570.005 and Mg/Nb ¼ 1.0770.02 mol%), refractive indices (n o ¼ 2:286 AE 0:0005 and n e ¼ 2:189 AE 0:0007), and the Curie temperature (1209.571.5 1C) further confirm ZLCz as a proven method for growing SLN single crystals.
Coherence-controlled soliton interaction
Nonlinear Optics: Materials, Fundamentals, and Applications, 2004
We show that interaction of two spatial optical solitons can be controlled by their total partial... more We show that interaction of two spatial optical solitons can be controlled by their total partial incoherence, and it may change from attractive to repulsive about a certain threshold in the coherence parameter
Directional coupler using soliton-induced waveguides
We develop a theory of soliton spiraling in a bulk nonlinear medium and reveal a new physical mec... more We develop a theory of soliton spiraling in a bulk nonlinear medium and reveal a new physical mechanism: Periodic power exchange via induced coherence, which can lead to stable spiraling and the formation of dynamical two-soliton states. Our theory explains earlier observations and provides a number of predictions which are verified experimentally. Finally, we show theoretically and experimentally that soliton spiraling can be controlled by the degree of mutual initial coherence. [S0031-9007(98)08048-X]
Materials Science And Engineering: B, Mar 1, 2006
The zone-leveling Czochralski (ZLCz) technique is a continuous feeding process and can be used fo... more The zone-leveling Czochralski (ZLCz) technique is a continuous feeding process and can be used for the growth of near-stoichiometric lithium niobate (SLN) single crystals. However, the finite crucible length can cause the variation of the zone length and thus the composition and stoichiometry, especially in the growth of a large diameter crystal. To solve the problems, several approaches were proposed for the growth of 4 cm-diameter 1 mol% MgO-doped SLN. The modification of the hot zone to minimize the zone variation was found useful for the uniformity, but the stoichiometry was inadequate even with the zone composition up to 60 mol% Li 2 O. A Li-excess feed was further used and a good Li/Nb ratio was obtained. Adding K 2 O (16 mol%) into the solution zone was useful as well, but it was inferior to using the Li-excess feed. In addition, a much lower growth rate was needed for getting an inclusion-free crystal.
Tuning of second harmonic generation in soliton-induced waveguides
Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39 (IEEE Cat. No.00CH37088), 2000
We have demonstrated that photorefractive soliton-induced waveguides can improve the SHG conversi... more We have demonstrated that photorefractive soliton-induced waveguides can improve the SHG conversion efficiency considerably while offering tuning angle range of ±7°, which translates into 4 nanometer tunability. We expect much higher improvement with a longer crystal and a narrower soliton
We demonstrate experimentally second-harmonic generation in waveguides induced by photorefractive... more We demonstrate experimentally second-harmonic generation in waveguides induced by photorefractive solitons and show that the conversion eff iciency is improved considerably. These induced waveguides are f lexible and can be generated in any crystalline direction that allows soliton formation, and thus offer broad tunability (by rotation of the crystal), which cannot exist in fabricated waveguides.
Photorefractive Spatial Solitons
Nonlinear Guided Waves and Their Applications, 1996
Coherent collisions of photorefractive solitons
Optics Letters, 1997
We present an experimental study of coherent collisions between one-dimensional bright photorefra... more We present an experimental study of coherent collisions between one-dimensional bright photorefractive screening solitons in a bulk strontium barium niobate crystal.
Optics Letters, 1996
We study experimentally steady-state photorefractive screening solitons trapped in both transvers... more We study experimentally steady-state photorefractive screening solitons trapped in both transverse dimensionsand measure their beam profiles as they propagate throughout the crystal. The solitons are observed to be axially symmetric, and they self-bend. We characterize the soliton dependence on the optical intensity, appliedelectric-field strength, and beam diameter.
Optics Letters, 2004
We study, both numerically and experimentally, the transverse modulational instability of spatial... more We study, both numerically and experimentally, the transverse modulational instability of spatial stripe solitons in anisotropic nonlocal photorefractive media. We demonstrate that the instability scenarios depend strongly on the stripe orientation, but the anisotropy-induced features are largely suppressed for spatial solitons created by self-trapping of partially incoherent light.
Optics Letters, 1999
We predict the formation of optical spatial solitons in photorefractive polymers. The orientation... more We predict the formation of optical spatial solitons in photorefractive polymers. The orientational enhancement from the doped chromophores and the dependency of the quantum efficiency of generating mobile holes on the electric field make the polymeric solitons behave differently from other photorefractive solitons.
Physical Review Letters, 1999
We demonstrate experimentally collisions between vector ( Manakov-like) solitons that involve ene... more We demonstrate experimentally collisions between vector ( Manakov-like) solitons that involve energy exchange at large collision angles, for which scalar solitons pass through one another practically unaffected.
Self-Trapping of Partially Spatially Incoherent Light
Physical Review Letters, 1996
... VOLUME 77, NUMBER 3 PHYSICAL REVIEW LETTERS 15 JULY 1996 Self-Trapping of Partially Spatially... more ... VOLUME 77, NUMBER 3 PHYSICAL REVIEW LETTERS 15 JULY 1996 Self-Trapping of Partially Spatially Incoherent Light Matthew Mitchell, Zhigang Chen, Ming-feng Shih, and Mordechai Segev ... [5] JS Aitchison, AM Weiner, Y. Silberberg, MK Oliver, JL Jackel, DE Leaird, EM ...
Optics Letters, 1999
We demonstrate a directional coupler that employs two waveguides induced by two mutually incohere... more We demonstrate a directional coupler that employs two waveguides induced by two mutually incoherent photorefractive solitons propagating in parallel at close proximity. Eff icient coupling from one waveguide to the other is achieved for probe beams at wavelengths much longer than that of the solitons. We study the mutual coupling as a function of distance between solitons.
Tuning of second harmonic generation in soliton-induced waveguides
We have demonstrated that photorefractive soliton-induced waveguides can improve the SHG conversi... more We have demonstrated that photorefractive soliton-induced waveguides can improve the SHG conversion efficiency considerably while offering tuning angle range of ±7°, which translates into 4 nanometer tunability. We expect much higher improvement with a longer crystal and a narrower soliton
Four-Wave Mixing of Vector Solitons
Interactions between two vector solitons can be described by two coupled nonlinear wave eqs :
Self-Trapping of Partially Spatially Incoherent Light Beams
Optics & Photonics News, Dec 1, 1996
ABSTRACT
Complex Nonlinear Opto-Fluidics
We demonstrate symbiotic dynamics of light and nano-particles suspended in liquid. The light-forc... more We demonstrate symbiotic dynamics of light and nano-particles suspended in liquid. The light-force varies the local particle-density, modifies the fluid properties (surface-tension, viscosity), inducing flow in the fluid, causing synergetic nonlinear-dynamics of light and fluid.
Physical review, May 1, 1996
We study one-dimensional steady-state photorefractive screening solitons in a bulk strontium bari... more We study one-dimensional steady-state photorefractive screening solitons in a bulk strontium barium niobate crystal. We compare measurements and calculations of the soliton properties and find good agreement for relations between the profile, width and intensity of the soliton, the applied voltage and material parameters. We find the solitons stable against perturbations both in the plane and perpendicular to the plane of the soliton for intensities large compared to the background intensity. ͓S1063-651X͑96͒50505-2͔
Journal of Crystal Growth, Mar 1, 2005
The zone-levelling Czochralski (ZLCz) technique was used to grow MgO-doped near-stoichiometric li... more The zone-levelling Czochralski (ZLCz) technique was used to grow MgO-doped near-stoichiometric lithium niobate (SLN) crystals for the first time. The crystal was pulled from a Li-rich solution (58-60 mol% of Li 2 O) having an SLN solid supplied from below in a slender platinum crucible. An inner crucible was also used to avoid bubble incorporation. With 1 mol% MgO doping, three inclusion-free SLN crystals were grown. The transmittance along the grown crystals was found satisfactory (7671%) having an absorption edge of 30371 nm. The small variation of the composition (Li/Nb ¼ 0.97570.005 and Mg/Nb ¼ 1.0770.02 mol%), refractive indices (n o ¼ 2:286 AE 0:0005 and n e ¼ 2:189 AE 0:0007), and the Curie temperature (1209.571.5 1C) further confirm ZLCz as a proven method for growing SLN single crystals.
Coherence-controlled soliton interaction
Nonlinear Optics: Materials, Fundamentals, and Applications, 2004
We show that interaction of two spatial optical solitons can be controlled by their total partial... more We show that interaction of two spatial optical solitons can be controlled by their total partial incoherence, and it may change from attractive to repulsive about a certain threshold in the coherence parameter
Directional coupler using soliton-induced waveguides
We develop a theory of soliton spiraling in a bulk nonlinear medium and reveal a new physical mec... more We develop a theory of soliton spiraling in a bulk nonlinear medium and reveal a new physical mechanism: Periodic power exchange via induced coherence, which can lead to stable spiraling and the formation of dynamical two-soliton states. Our theory explains earlier observations and provides a number of predictions which are verified experimentally. Finally, we show theoretically and experimentally that soliton spiraling can be controlled by the degree of mutual initial coherence. [S0031-9007(98)08048-X]
Materials Science And Engineering: B, Mar 1, 2006
The zone-leveling Czochralski (ZLCz) technique is a continuous feeding process and can be used fo... more The zone-leveling Czochralski (ZLCz) technique is a continuous feeding process and can be used for the growth of near-stoichiometric lithium niobate (SLN) single crystals. However, the finite crucible length can cause the variation of the zone length and thus the composition and stoichiometry, especially in the growth of a large diameter crystal. To solve the problems, several approaches were proposed for the growth of 4 cm-diameter 1 mol% MgO-doped SLN. The modification of the hot zone to minimize the zone variation was found useful for the uniformity, but the stoichiometry was inadequate even with the zone composition up to 60 mol% Li 2 O. A Li-excess feed was further used and a good Li/Nb ratio was obtained. Adding K 2 O (16 mol%) into the solution zone was useful as well, but it was inferior to using the Li-excess feed. In addition, a much lower growth rate was needed for getting an inclusion-free crystal.
Tuning of second harmonic generation in soliton-induced waveguides
Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39 (IEEE Cat. No.00CH37088), 2000
We have demonstrated that photorefractive soliton-induced waveguides can improve the SHG conversi... more We have demonstrated that photorefractive soliton-induced waveguides can improve the SHG conversion efficiency considerably while offering tuning angle range of ±7°, which translates into 4 nanometer tunability. We expect much higher improvement with a longer crystal and a narrower soliton
We demonstrate experimentally second-harmonic generation in waveguides induced by photorefractive... more We demonstrate experimentally second-harmonic generation in waveguides induced by photorefractive solitons and show that the conversion eff iciency is improved considerably. These induced waveguides are f lexible and can be generated in any crystalline direction that allows soliton formation, and thus offer broad tunability (by rotation of the crystal), which cannot exist in fabricated waveguides.
Photorefractive Spatial Solitons
Nonlinear Guided Waves and Their Applications, 1996
Coherent collisions of photorefractive solitons
Optics Letters, 1997
We present an experimental study of coherent collisions between one-dimensional bright photorefra... more We present an experimental study of coherent collisions between one-dimensional bright photorefractive screening solitons in a bulk strontium barium niobate crystal.
Optics Letters, 1996
We study experimentally steady-state photorefractive screening solitons trapped in both transvers... more We study experimentally steady-state photorefractive screening solitons trapped in both transverse dimensionsand measure their beam profiles as they propagate throughout the crystal. The solitons are observed to be axially symmetric, and they self-bend. We characterize the soliton dependence on the optical intensity, appliedelectric-field strength, and beam diameter.
Optics Letters, 2004
We study, both numerically and experimentally, the transverse modulational instability of spatial... more We study, both numerically and experimentally, the transverse modulational instability of spatial stripe solitons in anisotropic nonlocal photorefractive media. We demonstrate that the instability scenarios depend strongly on the stripe orientation, but the anisotropy-induced features are largely suppressed for spatial solitons created by self-trapping of partially incoherent light.
Optics Letters, 1999
We predict the formation of optical spatial solitons in photorefractive polymers. The orientation... more We predict the formation of optical spatial solitons in photorefractive polymers. The orientational enhancement from the doped chromophores and the dependency of the quantum efficiency of generating mobile holes on the electric field make the polymeric solitons behave differently from other photorefractive solitons.
Physical Review Letters, 1999
We demonstrate experimentally collisions between vector ( Manakov-like) solitons that involve ene... more We demonstrate experimentally collisions between vector ( Manakov-like) solitons that involve energy exchange at large collision angles, for which scalar solitons pass through one another practically unaffected.
Self-Trapping of Partially Spatially Incoherent Light
Physical Review Letters, 1996
... VOLUME 77, NUMBER 3 PHYSICAL REVIEW LETTERS 15 JULY 1996 Self-Trapping of Partially Spatially... more ... VOLUME 77, NUMBER 3 PHYSICAL REVIEW LETTERS 15 JULY 1996 Self-Trapping of Partially Spatially Incoherent Light Matthew Mitchell, Zhigang Chen, Ming-feng Shih, and Mordechai Segev ... [5] JS Aitchison, AM Weiner, Y. Silberberg, MK Oliver, JL Jackel, DE Leaird, EM ...
Optics Letters, 1999
We demonstrate a directional coupler that employs two waveguides induced by two mutually incohere... more We demonstrate a directional coupler that employs two waveguides induced by two mutually incoherent photorefractive solitons propagating in parallel at close proximity. Eff icient coupling from one waveguide to the other is achieved for probe beams at wavelengths much longer than that of the solitons. We study the mutual coupling as a function of distance between solitons.