Raphy Lavi - Academia.edu (original) (raw)
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Nepal Agricultural Research Council (NARC)
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Papers by Raphy Lavi
Optics Letters, 1996
An intracavity critically phase-matched optical parametric oscillator (OPO) was demonstrated with... more An intracavity critically phase-matched optical parametric oscillator (OPO) was demonstrated with a LiNbO 3 crystal placed inside the resonator of a diode side-pumped Q-switched Nd:YAG laser. The OPO acted as a singly resonating cavity on the signal with a threshold below 10 MW͞cm 2. Output energy as high as 640 mJ was observed at the idler wavelength of 3.7 mm, which corresponds to a conversion efficiency of 1.8% from diode light to idler light. Tunability over the wavelength range 3.3-4.15 mm was obtained by rotation of the LiNbO 3 crystal.
Advanced Solid-State Lasers, 2001
We have recently deployed a high brightness, fiber coupled diode laser array for pumping an Nd: Y... more We have recently deployed a high brightness, fiber coupled diode laser array for pumping an Nd: YAG laser in a 946nm configuration. We achieved outstanding results for 946nm (CW) output power. Results for 473nm are encouraging.
Journal of the Optical Society of America B, 2006
An analytic model is developed to evaluate the extractable energy from high-energy pulsed ytterbi... more An analytic model is developed to evaluate the extractable energy from high-energy pulsed ytterbium-doped fiber amplifiers and lasers. The energy extraction capabilities under the limitation of spurious lasing, due to amplified spontaneous emission, are mapped for various numerical apertures, single-and multitransversemode evolution, and operating wavelengths. The calculation results of the analytic model show a good match with experimental results carried out for various double-clad fiber amplifiers. The model provides an accurate assessment for the maximum pulse energy that can be extracted from a given ytterbium-doped fiber. In addition, for a specific pump power, the model can be used to determine the minimum repetition rate and optimal length, under which the laser source can be operated before spurious lasing occurs.
lations presented earlier. In comparison to the results in Table VIII, the multireferencc calcula... more lations presented earlier. In comparison to the results in Table VIII, the multireferencc calculation of Sloan et al.13 orders the states slightly differently: 3rI, %, 'A, In. Further the RMOS fitted surface yields a 3rI-lA separation at the anion geometry of only 0.63 eV. Apparently, all four surfaces should be considered before assigning all of the experimental spectrum's features. In addition, the inclusion of the spin-orbit interaction will result in even more potential energy surfaces to be considered.
AIP Conference Proceedings, 1988
The Journal of Physical Chemistry
AIP Conference Proceedings, 1988
CLEO/Europe Conference on Lasers and Electro-Optics, 1998
Advanced Solid State Lasers, 2001
Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505), 2000
Optics Communications, 1998
Advanced Solid State Lasers, 2001
Advanced Solid-State Lasers, 2001
Solid State Lasers and Amplifiers, 2004
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007
Optics Letters, 1996
An intracavity critically phase-matched optical parametric oscillator (OPO) was demonstrated with... more An intracavity critically phase-matched optical parametric oscillator (OPO) was demonstrated with a LiNbO 3 crystal placed inside the resonator of a diode side-pumped Q-switched Nd:YAG laser. The OPO acted as a singly resonating cavity on the signal with a threshold below 10 MW͞cm 2. Output energy as high as 640 mJ was observed at the idler wavelength of 3.7 mm, which corresponds to a conversion efficiency of 1.8% from diode light to idler light. Tunability over the wavelength range 3.3-4.15 mm was obtained by rotation of the LiNbO 3 crystal.
Advanced Solid-State Lasers, 2001
We have recently deployed a high brightness, fiber coupled diode laser array for pumping an Nd: Y... more We have recently deployed a high brightness, fiber coupled diode laser array for pumping an Nd: YAG laser in a 946nm configuration. We achieved outstanding results for 946nm (CW) output power. Results for 473nm are encouraging.
Journal of the Optical Society of America B, 2006
An analytic model is developed to evaluate the extractable energy from high-energy pulsed ytterbi... more An analytic model is developed to evaluate the extractable energy from high-energy pulsed ytterbium-doped fiber amplifiers and lasers. The energy extraction capabilities under the limitation of spurious lasing, due to amplified spontaneous emission, are mapped for various numerical apertures, single-and multitransversemode evolution, and operating wavelengths. The calculation results of the analytic model show a good match with experimental results carried out for various double-clad fiber amplifiers. The model provides an accurate assessment for the maximum pulse energy that can be extracted from a given ytterbium-doped fiber. In addition, for a specific pump power, the model can be used to determine the minimum repetition rate and optimal length, under which the laser source can be operated before spurious lasing occurs.
lations presented earlier. In comparison to the results in Table VIII, the multireferencc calcula... more lations presented earlier. In comparison to the results in Table VIII, the multireferencc calculation of Sloan et al.13 orders the states slightly differently: 3rI, %, 'A, In. Further the RMOS fitted surface yields a 3rI-lA separation at the anion geometry of only 0.63 eV. Apparently, all four surfaces should be considered before assigning all of the experimental spectrum's features. In addition, the inclusion of the spin-orbit interaction will result in even more potential energy surfaces to be considered.
AIP Conference Proceedings, 1988
The Journal of Physical Chemistry
AIP Conference Proceedings, 1988
CLEO/Europe Conference on Lasers and Electro-Optics, 1998
Advanced Solid State Lasers, 2001
Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505), 2000
Optics Communications, 1998
Advanced Solid State Lasers, 2001
Advanced Solid-State Lasers, 2001
Solid State Lasers and Amplifiers, 2004
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007