Polarizing Spectroscopy of Y3Al5O12, SrAl2O4, CaAl2O4 Crystals Containing Cr4+

Borodin, N. I.; Охримчук, А. Г.; Shestakov, A. V.

doi:10.1364/assl.1992.cl11

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“…The measured Cr 4þ ion fluorescence intensity was calibrated by its absorption coefficient and compared with the results of Sugimoto et al and Borodin et al to estimate the Cr 4þ concentration. 10,18) The Cr 4þ fluorescence intensity was converted to Cr 4þ concentration by adopting an absorption cross section of 5 Â 10 À18 cm 2 . 19) Lipavsky et al observed that the effect of co-dopants (Mg 2þ or Ca 2þ ) on the optical absorption of the Cr 4þ ion in YAG was not very significant, at least at 1064 nm.…”

Section: Methodsmentioning

confidence: 99%

Enhancement of Cr⁴⁺ Concentration in Y₃Al₅O₁₂ Crystal Fiber by Pregrowth Perimeter Deposition

Tsai

Lin

Huang

et al. 2008

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Chromium ions tend to diffuse outward during the laser-heated pedestal growth (LHPG) of Y 3 Al 5 O 12 (YAG) crystal fiber, in which the average Cr 4þ ion concentration decreases significantly after each diameter-reduction step. The Cr 4þ ions are replenished using an electron gun to deposit Cr 2 O 3 and divalent-ion oxide (CaO or MgO) on the source rod circumference before LHPG. It was observed that Ca 2þ has better efficiency to diffuse into the source rod more efficiently than Mg 2þ generating fewer defects and stacking faults. By CaO deposition and post growth annealing at 1350 C under an oxygen environment, a 110% increase in Cr 4þ concentration was obtained. The achieved Cr 4þ concentration and the ratio of Cr 4þ to total Cr were 1:76 Â 10 18 cm À3 and 5.5, respectively. The Ca,Cr:YAG crystal fiber can thus be used as an ultra broadband laser material and amplified spontaneous emitter.

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Section: Methodsmentioning

confidence: 99%

Enhancement of Cr⁴⁺ Concentration in Y₃Al₅O₁₂ Crystal Fiber by Pregrowth Perimeter Deposition

Tsai

Lin

Huang

et al. 2008

jjap

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“…The Q-switch was AR coated on both surfaces at 1061 nm with a reflectivity of ~10 -3 . The spectroscopic properties and saturation dynamics of Cr +4 :YAG can be found in [17,18] [20,21]) Cr +4 :YAG has been used to obtain temporally smooth Q-switched pulses [22,23] and also QSML pulse trains [24].…”

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confidence: 99%

Cavity length dependence of mode beating in passively Q-switched Nd-solid state lasers.

Zameroski¹,

Wanke²,

Bossert³

2012

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The beat frequencies, temporal intensity profile, and modulation depth of a flash lamp pumped passively Q-switched, Nd:Cr:GSGG monoblock laser with a Cr +4 :YAG Qswitch are investigated as a function of cavity length. The measured temporal widths are linearly correlated with cavity length and the modulation depths of the temporal waveforms are periodic in nature with cavity length, peaking at integer multiples of c/2nL. Simulations support measured trends in the pulse widths and beat frequencies as a function of cavity length.4

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Polarizing Spectroscopy of Y3Al5O12, SrAl2O4, CaAl2O4 Crystals Containing Cr4+

Cited by 2 publications

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Enhancement of Cr⁴⁺ Concentration in Y₃Al₅O₁₂ Crystal Fiber by Pregrowth Perimeter Deposition

Enhancement of Cr⁴⁺ Concentration in Y₃Al₅O₁₂ Crystal Fiber by Pregrowth Perimeter Deposition

Cavity length dependence of mode beating in passively Q-switched Nd-solid state lasers.

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Polarizing Spectroscopy of Y3Al5O12, SrAl2O4, CaAl2O4 Crystals Containing Cr4+

Cited by 2 publications

References 0 publications

Enhancement of Cr4+ Concentration in Y3Al5O12 Crystal Fiber by Pregrowth Perimeter Deposition

Enhancement of Cr4+ Concentration in Y3Al5O12 Crystal Fiber by Pregrowth Perimeter Deposition

Cavity length dependence of mode beating in passively Q-switched Nd-solid state lasers.

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Enhancement of Cr⁴⁺ Concentration in Y₃Al₅O₁₂ Crystal Fiber by Pregrowth Perimeter Deposition

Enhancement of Cr⁴⁺ Concentration in Y₃Al₅O₁₂ Crystal Fiber by Pregrowth Perimeter Deposition