Thermal lensing effects for diode-end-pumped &lt;inline-formula&gt;&lt;math display="inline" overflow="scroll"&gt;&lt;msub&gt;&lt;mi&gt;Nd:YVO&lt;/mi&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/inline-formula&gt; and Nd:YAG lasers

Peng, Xiaoyuan; Xu, Lei; Asundi, Anand

doi:10.1117/1.1787529

Cited by 24 publications

(2 citation statements)

References 11 publications

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“…The predicted orientation of the principal meridional planes for a-cut tetragonal crystal agrees with the experimental observations, e.g. for a-cut YVO 4 and GdVO 4 [33][34][35].…”

Section: Refractive Indexsupporting

confidence: 85%

Photo-elastic effect, thermal lensing and depolarization ina-cut tetragonal laser crystals

Yumashev¹,

Zakharova²,

Loiko

2016

Laser Phys.

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We report on analytical description of thermal lensing effect in tetragonal crystals cut along the [1 0 0] crystallographic axis, for the two principal light polarizations, E ┴ c and E || c, under diode-pumping (plane stress approximation). Within this approach, we take into account anisotropy of elastic, photo-elastic, thermal and optical properties of the material. Expressions for the 'generalized' thermo-optic coefficient χ are presented. It is shown that astigmatism of thermal lens is determined both by the photo-elastic and end-bulging effects. The sign of the photo-elastic term χ″ can be either positive or negative affecting significantly the sign of the thermal lens. Depolarization loss in a-cut tetragonal crystals is few orders of magnitude lower than that in cubic crystals. Calculations are performed for a-cut tetragonal molybdates, Nd:CaMoO 4 , Nd:PbMoO 4 and Nd:NaBi(MoO 4 ) 2 .

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“…The predicted orientation of the principal meridional planes for a-cut tetragonal crystal agrees with the experimental observations, e.g. for a-cut YVO 4 and GdVO 4 [33][34][35].…”

Section: Refractive Indexsupporting

confidence: 85%

Photo-elastic effect, thermal lensing and depolarization ina-cut tetragonal laser crystals

Yumashev¹,

Zakharova²,

Loiko

2016

Laser Phys.

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“…However, Nd:YVO 4 has low mechanical fracture, thus the pump intensity must be kept under a threshold. It has been shown that the pump power fracture limit of Nd:YVO 4 is inversely proportional to the doping concentration [21]. Therefore, a Nd:YVO 4 crystal with low doped concentration was used to reduce and the length of the doped crystal was decided for high pump absorption efficiency [22,23] Figure 6 (online color at www.lphys.org) Experimental setup of the second solid-state amplifier stage in hybrid amplifier system crystal was used in amplifier system.…”

Section: Dual-end Pumped Composite Nd:yvo 4 Amplifier Systemmentioning

confidence: 99%

High peak power picosecond hybrid fiber and solid-state amplifier system

Wushouer

Yan

et al. 2010

Laser Phys. Lett.

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We report the high peak power picosecond hybrid fiber and solid-state laser amplifier system. The passively mode-locked solid-state seed source produced an average power of 1.8 W with pulse width of 14 ps and repetition rate of 86 MHz. It was directly coupled into the first Yb-doped polarized photonic crystal fiber amplifier stage. To avoid the nonlinear effects in fiber, the output power from the first stage was merely amplified to 24 W with the narrow spectra broadening of 0.21 nm. For the improvement of the peak power, the dual-end pumped composite Nd:YVO4 amplifier system has been chosen at the second stage. To reduce the serious thermal effect, the thermally bonded composite YVO4 – Nd:YVO4 – YVO4 rod crystal was used as the gain medium. The 53 W TEM00 mode with the peak power of 40 kW, beam quality of M2 < 1.15, corresponding to the optical-optical efficiency of 42.4% was obtained at the hybrid amplifier laser system. The system allows using a low power seed source and demonstrates an increase in the peak power beyond a fiber master oscillator power amplifier's (MOPA's) limit.

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A study of the heat transfer characteristics of a laser rod in a concentric circular tube

Huai

2007

Appl. Phys. B

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Thermal lensing effects for diode-end-pumped <inline-formula><math display="inline" overflow="scroll"><msub><mi>Nd:YVO</mi><mrow><mn>4</mn></mrow></msub></math></inline-formula> and Nd:YAG lasers

Cited by 24 publications

References 11 publications

Photo-elastic effect, thermal lensing and depolarization ina-cut tetragonal laser crystals

Photo-elastic effect, thermal lensing and depolarization ina-cut tetragonal laser crystals

High peak power picosecond hybrid fiber and solid-state amplifier system

A study of the heat transfer characteristics of a laser rod in a concentric circular tube

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