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1.
Pulsed laser operation at room temperature and cw laser output below 260 K has been demonstrated with the laser material KZnF3:Cr3+ in the spectral range between 775—826 nm. The system can be tuned by dispersive elements in the resonator or by temperature variation. 相似文献
2.
We report a red laser at 671 nm generation by intracavity frequency doubling of a continuous wave (cw) laser operation of
a 1342 nm Nd:Y0.36Gd0.64VO4 laser under diode pumping into the emitting level 4
F
3/2. An GdCa4O(BO3)3 (GdCOB) 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 17.8 W, as high as 1.12 W of cw output power at 671 nm is achieved. The optical-to-optical
conversion efficiency is up to 6.3%, and the fluctuation of the red output power was better than 3.5% in the given 30 min. 相似文献
3.
B. Couillaud L.A. Bloomfield J.E. Lawler A. Siegel T.W. Hänsch 《Optics Communications》1980,35(3):359-362
Doppler-free saturated absorption spectroscopy has been used to study the ultraviolet HgI transitions 63P0-63D1 at 296.73 nm and 63P0-61D2 at 296.76 nm. The required tunable ultraviolet radiation was produced by a ring cavity cw dye laser with intracavity ADA frequency doubler. The isotope shifts of the 63P0 -63D1 line for naturally abundant mercury have been measured to within a few MHz. 相似文献
4.
We report a green laser at 532 nm generation by intracavity frequency doubling of a continuous wave (cw) laser operation of
a 1064 nm Nd:Y0.5Gd0.5VO4 laser under diode pumping into the emitting level 4
F
3/2. A KTiOPO4 (KTP) crystal, cut for critical type-II phase matching at room temperature is used for second harmonic generation (SHG) of
the laser. At an incident pump power of 17.8 W, as high as 4.21 W of cw output power at 532 nm is achieved. The optical-to-optical
conversion efficiency is up to 23.6%, and the fluctuation of the green output power was better than 2.8% in the given 30 min. 相似文献
5.
A cw dye laser has been used for fluorescence line narrowing experiments by resonant excitation on Pr3+ ions in LaAlO3. Scanning the excitation radiation through the absorption line width corresponding to the transition 3H4 (0 cm-1) → 1D2 (16 694 cm-1) while fluorescence was observed, has put into evidence a deformation of the symmetry around Pr3+ ions, different for every site.This experiment shows the power of cw dye laser spectroscopy for investigating optical spectra in crystals. 相似文献
6.
Groundstate absorption, fluorescence, excited-state absorption, and stimulated emission of Pr:YA1O3 were measured in dependence on the polarization. The results reflect the anisotropy of the host lattice. Especially the polarized spectra of the stimulated emission fit very well with the laser data of this material. Seven cw laser transitions in the visible spectral range obtained so far in Pr:YA1O3 with argon-ion laser pumping were identified in the spectra of the stimulated emission. In addition, two infrared cw laser transitions were realized. The best results were achieved for the3
P
03
F
4 laser transition at 746.9 nm with a maximum slope efficiency of 24.6%, a maximum output power of 49.6 mW, and a laser threshold of 25 mW. 相似文献
7.
Cavity ringdown (CRD) spectroscopy, with its high sensitivity, provides a novel way to perform continuous-wave (cw) stimulated
Raman gain (SRG) spectroscopy, rather than by conventional optically detected coherent Raman techniques. Tunable cw laser
light at ∼1544 nm is used to probe ringdown decay from a rapidly-swept, high-finesse optical cavity containing a gas-phase
sample of interest and itself located inside the cavity of a cw single-longitudinal-mode Nd:YAG ring laser operating at ∼1064.4
nm. This approach is used to measure cw SRG spectra of the ν
1 fundamental rovibrational Raman band of methane gas at ∼2916.5 cm−1. The resulting SRG-CRD resonances have ringdown times longer than in the off-resonance case, in contrast to the usual shorter
ringdown times arising from absorption and other loss processes. Previously reported noise-equivalent sensitivities have been
substantially improved, by using a second ringdown cavity to facilitate subtraction of infrared-absorption background signals.
Moreover, by employing a ringdown cavity in the form of a ring, the SRG-pump and CRD-detected Stokes beams can co-propagate
uni-directionally, which significantly reduces Doppler broadening. 相似文献
8.
S. González-Pérez I. R. Martín F. Lahoz P. Haro-González J. Herreros 《Applied Physics A: Materials Science & Processing》2008,93(4):983-986
Local crystalline formation in erbium doped oxyfluoride glass has been obtained under a cw Argon laser irradiation up to 1.8
W pumping power. By exciting at 514 nm, the emission from 800 nm and 850 nm corresponding to the 4S3/2(2H11/2)→4I13/2 electronic transitions have been analyzed both inside and outside the irradiated area. The changes in the emission spectra
indicate that the high power Ar laser irradiation has resulted in a localized desvitrification process. The temperature dependence
of the fluorescence intensity ratio of the 800 nm and 850 nm emission bands has been used to determine the temperature of
the irradiated zone. Moreover, the average lifetime of the 4S3/2(2H11/2) thermalized levels have been measured as a function of the excitation spot position. An important decrease is observed at
the irradiated area. These results confirm that a localized cristalline phase has been created by the laser action. 相似文献
9.
Nilesh J. Vasa Kouki Morishita Husayin Parhat Tatsuo Okada Mitsuo Maeda Osamu Uchino 《Optical Review》1997,4(1):A176-A179
Spectrally pure high-power tunable single-mode operation of a pulsed Ti3+:sapphire laser by a tunable injection-seeding is reported. The injection laser was a cw diode laser pumped, spectrally narrowed
tunable Cr3+:LiSrAlF6 (Cr3+:LiSAF) laser with a grating in the auxiliary cavity. Single-mode tunable operation of a pulsed Ti3+: sapphire ring oscillator was obtained at different wavelengths in the range between 818 nm and 848 nm with a typical linewidth
of 0.006 cm-1. To extend the applicability of this operation to a differential absorption lidar system, the single-mode Ti3+:sapphire oscillator output was amplified and a high energy output of 38 mJ was obtained with the same linewidth. 相似文献
10.
We report a green laser at 541.5 nm generation by intracavity frequency doubling of a continuous wave (cw) laser operation
of a 1083 nm Nd:GdVO4 laser under 880 nm diode pumping into the emitting level 4
F
3/2. 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 17.8 W, as high as 2.52 W of cw output power at 541.5 nm is achieved. The optical-to-optical
conversion efficiency is up to 14.2%, and the fluctuation of the green output power was better than 3.6% in the given 30 min. 相似文献
11.
We report efficient, diode-pumped, self-frequency doubling (SFD) in the newly developed laser crystal Nd3+:Na3La9O3(BO3)8 (Nd:NLBO). More than 730?mW of fundamental output power at 1072?nm was achieved with a slope efficiency of 16.2%. With incident pump power of 8?W, 29?mW of green cw laser emission at 536?nm was observed with proper phase matching. This initial performance and the good optical properties of the crystalline host are encouraging for the development of a high power diode-pumped SFD visible light laser source. 相似文献
12.
3 crystal have been measured using Z-scan technique with picosecond pulses at 532 nm. The nonlinear absorption coefficient
and nonlinear refractive index are determined to be 2.5×10-10 cm/W and 5.3×10-15 cm2/W, respectively. Both sign and magnitude of the measured refractive nonlinearity are considerably different from the reported
Z-scan results in LiNbO3 obtained with cw laser beam at 514 nm. The nonlinearities in LiNbO3 induced by 532 nm picosecond pulses are believed to be mainly due to two-photon absorption and bound electronic Kerr effect
associated with the two-photon absorption.
Received: 4 July 1996 相似文献
13.
We present the spectroscopic properties and room temperature of a cw tunable laser operation with Yb3+ doped CaF2 single crystals grown in our laboratory. A laser slope efficiency of 50% with respect to the absorbed 920 nm pump power was obtained, and the laser wavelength could be tuned between 1000 and 1060 nm. PACS 42.55R; 42.70An erratum to this article can be found at 相似文献
14.
We present what is, to the best of our knowledge, the first diode-pumped Nd:La3Ga5SiO14 (Nd:LGS) laser emitting at 888 nm, based on the 4
F
3/2-4
I
9/2 transition, generally used for a 904 nm emission. The use of a pump module with 16 passes through the crystal allowed the
realization of a Nd:LGS thin-disk laser with 1.41 W of continuous wave (cw) output power at 888 nm. Moreover, intracavity
second-harmonic generation (SHG) in cw mode has also been demonstrated with a power of 221 mW at 444 nm by using a BiB3O6 (BiBO) nonlinear crystal. 相似文献
15.
We report the efficient compacted deep-blue laser at 456 nm generation by intra-cavity frequency doubling of a continuous-wave (cw) laser operation of a diode-pumped Nd:GdVO4 laser on the 4
F
3/2→4
I
9/2 transition at 912 nm. The different long LiB3O5 (LBO) crystals, cut for critical type I phase matching at room temperature, are used for second harmonic generation (shg) of the laser. At an incident pump power of 30 W, up to 5.3 W of cw output power at 456 nm is achieved with 15-mm-long LBO (3.8 W with 10 mm-long LBO). The conversion efficiency is 17.7% from pump diode input to second harmonic wave output.PACS 42.70.Hj; 42.55.Xi; 42.65.Ky 相似文献
16.
We report the observation and identification of over 50 new cw laser lines belonging to the B3∏?X1∑ system of I2 optically pumped by a single mode krypton ion laser. When pumping at 531 nm, simultaneous oscillation was achieved on up to 16 lines in the range 540 nm to 650 nm. This system offers considerable potential as a multi-wavelength laser source in interferometry. 相似文献
17.
B. Struve G. Huber V. V. Laptev I. A. Shcherbakov E. V. Zharikov 《Applied physics. B, Lasers and optics》1983,30(3):117-120
We report for the first time on tunable room temperature cw laser action of a transition metal laser material. In Cr3+:GdScGa-garnet crystals almost the total fluorescence is channelled into the broad band4 T 2→4 A 2 transition. The fluorescence lifetime is τ=120 μs. Laser pumping in the blue-green and yellow-red spectral range yields pump thresholds around 250 mW and slope efficiencies up to 11%. The wavelength of the free running Cr3+ laser is centered at 777 nm. 相似文献
18.
We have found twelve new FIR laser lines in12CH3OH and thirty three in13CH3OH. Both molecules were pumped by a regular cw CO2 laser. We have also assigned 2013CH3OH laser lines to specific rotational energy levels in the excited C-O stretchhindered rotation combined states 相似文献
19.
S.M. Cristescu S.T. Persijn S. te Lintel Hekkert F.J.M. Harren 《Applied physics. B, Lasers and optics》2008,92(3):343-349
Infrared gas phase spectroscopy is becoming very common in many life science applications. Here we present three types of
trace gas detection systems based on CO2 laser and continuous wave (cw) optical parametric oscillator (OPO) in combination with photoacoustic spectroscopy and cw
quantum cascade laser (QCL) in combination with wavelength modulation spectroscopy. Examples are included to illustrate the
suitability of CO2 laser system to monitor in real time ethylene emission from various dynamic processes in plants and microorganisms as well
as from car exhausts. The versatility of an OPO-based detector is demonstrated by simultaneous detection of 13C-methane and 12C-methane (at 3240 nm) at similar detection limits of 0.1 parts per billion by volume. Recent progress on a QCL-based spectrometer
using a continuous wave QCL (output power 25 mW, tuning range of 1891–1908 cm-1) is presented and a comparison is made to a standard chemiluminescence instrument for analysis of NO in exhaled breath.
PACS 42.62 Be; 42.62 Fi 相似文献
20.
N.A. Tolstik A.E. Troshin S.V. Kurilchik V.E. Kisel N.V. Kuleshov V.N. Matrosov T.A. Matrosova M.I. Kupchenko 《Applied physics. B, Lasers and optics》2007,86(2):275-278
We report on the spectroscopy and, for the first time to our knowledge, continuous-wave and Q-switched diode-pumped laser
operation of Er,Yb:YVO4 crystal. Absorption and emission spectra of the crystal were determined. Lifetimes of Er3+
4
I
13/2 and 4
I
11/2 levels that define laser performance of the crystal were measured and parameters of energy transfer between Yb3+ and Er3+ ions were estimated. cw output power of 115 mW with slope efficiency of 5.4% was achieved at 1604 nm. In the Q-switched mode
an average output power of 81 mW with slope efficiency of 3.5% and pulse duration of 150 ns was obtained. In quasi-cw regime
maximal peak power of 610 mW with slope efficiency of 6.7% was demonstrated.
PACS 42.55.Xi; 42.60.Gd; 42.70.Hj 相似文献