Laser Physics
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The Kuramoto-Sivashinsky equation for the defect-deformation instability of a surface-stressed nanolayer
Laser Physics - Tập 19 Số 3 - Trang 538-543 - 2009
Linearly-polarized Tm-doped double-clad fiber laser
Laser Physics - Tập 20 - Trang 1752-1755 - 2010
We report a linearly polarized Tm doped fiber laser. The fiber laser was set up
by using a piece of polarization maintaining Tm doped double clad fiber of 5 m
length as gain medium and a polarization beam splitter as a polarization
selector. The fiber laser was pumped by a fiber pigtailed laser diode working at
790 nm with a maximum output power of 90 W. The linearly polarized Tm laser
operated at...
Third harmonic generation of Nd:glass laser with novel composite deuterated KDP crystals
Laser Physics - Tập 20 - Trang 1923-1926 - 2010
A novel composite partially deuterated KDP crystal used for frequency tripling
is experimentally demonstrated for the first time in this paper. The deuteration
level is used as a degree of freedom to alter the phase matching wavelength so
as to increase the bandwidth acceptance. The results show that the acceptance
bandwidth based on such crystal can be increased by a factor of 3 comparing with
th...
Optical parameters measurement for diagnostic and photodynamic therapy of human cervical adenocarcinoma (HeLa) cell line
Laser Physics - - 2012
Increasing efficiency of laser fluorescence diagnostics of microbial diseases
Laser Physics - Tập 17 - Trang 1416-1423 - 2007
The laser-induced fluorescence spectra of five types of mycobacteria are studied
in various associations. The results obtained are used to demonstrate the
possibility of a diagnostic system for the differential diagnostics of microbial
diseases. The method employed for the specific analysis of microbial species in
the substrate that contain various associations is based on a regression of the
spec...
Dressed states analysis of lasing without population inversion in a three-level ladder scheme: Approximate analytic time dependent solutions
Laser Physics - Tập 19 - Trang 290-304 - 2009
A dressed-state study of lasing without population inversion from a three level
atom interacting with a bi-chromatic laser field, in the ladder configuration,
is formulated. We allow the atomic system to be dressed by both laser filed
photons (double dressing). The evolution of the system under consideration is
being explored both analytically and numerically, within the transient regime.
Time dep...
Bidirectional-pumped L-band erbium-doped fiber amplifier with pump distribution technique
Laser Physics - Tập 22 - Trang 1252-1256 - 2012
A dual-stage erbium doped fiber amplifier (EDFA) having a flat gain wavelength
response throughout L-band transmission window is presented. By applying pump
power distribution technique, the pump power is distributed to two different
stages with different length of EDF depending on the coupling ratio. By
controlling these two parameters, gain of 19.1 dB with small gain variation of
less than 0.5 d...
Diode-pumped Nd:GAGG-LBO laser at 531 nm
Laser Physics - Tập 22 - Trang 485-488 - 2012
We report a green laser at 531 nm generation by intracavity frequency doubling
of a continuous wave (cw) laser operation of a 1062 nm Nd:GAGG laser under
in-band diode pumping at 808 nm. A LiB3O5 (LBO) crystal, cut for critical type I
phase matching at room temperature is used for second harmonic generation of the
laser. At an incident pump power of 18.5 W, as high as 933 mW of cw output power
at ...
Possibility of lasing on the Ne transitions in the afterglow of a background electron multiplication wave
Laser Physics - Tập 17 - Trang 1-4 - 2007
The possibility of lasing with the Ne + H2 Penning mixture in the afterglow of a
background electron multiplication wave that emerges in the presence of a
nanosecond high-voltage pulse with the subnanosecond leading edge across the
discharge gap filled with the atmospheric-pressure gas is considered. The needed
nonuniformity of the field is created with small-curvature-radius electrodes. It
is dem...
Ablation induced by single-and multiple-femtosecond laser pulses in lithium niobate
Laser Physics - Tập 17 - Trang 1378-1381 - 2007
We present results on the surface-damage threshold of lithium niobate after
single-and multiple-femtosecond laser pulse irradiation at the pulse duration of
80 fs, with a 800-nm wavelength, and a repetition rate of 1 kHz. The
surface-ablation threshold was found to decrease significantly with an increase
in the pulse number applied to the surface until reaching an almost constant
level due to an i...
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