Preparation and properties of crystalline laser oxide materials

Monchamp, R. R.

doi:10.1016/0022-4596(75)90306-0

Cited by 20 publications

(13 citation statements)

References 6 publications

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“…While the field of optics has advanced at a rapid pace to develop and improve such lasers it would seem that the crystal growth of garnets has not advanced quite at the same pace. Though the Czochralski and flux growth of YAG have enjoyed several advances (in particular the understanding of compositional variations, interface shape and diameter control [9][10][11][12]), YAG crystals are still grown much in the same way as they were in the early days of laser materials research some 40-50 years ago [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Revisiting the Hydrothermal growth of YAG

McMillen

Mann

Fan

et al. 2012

Journal of Crystal Growth

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Section: Introductionmentioning

confidence: 99%

Revisiting the Hydrothermal growth of YAG

McMillen

Mann

Fan

et al. 2012

Journal of Crystal Growth

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“…The thermal management challenges have led to rebirth in development of transparent sesquoxides (e.g., Y2O3, Lu2O3, and Sc2O3), as they have higher thermal conductivity compared to YAG (13 -16 W/m-K vs. ~ 11 W/m-K), and appear to be better suited for high laser power applications [1,2,3]. As the sesquoxides materials are refractory in nature, with melting points higher than 2400 °C, reproducibility in growing large dimension single-crystal, of very high purity and optically transparent, has proven to be expensive and difficult [2,3,4].…”

Section: Introductionmentioning

confidence: 99%

“…As the sesquoxides materials are refractory in nature, with melting points higher than 2400 °C, reproducibility in growing large dimension single-crystal, of very high purity and optically transparent, has proven to be expensive and difficult [2,3,4]. The loss or extinction coefficient used to characterize laser material has significant impact on the laser performance in terms of output power and spatial beam quality [5,6].…”

Section: Introductionmentioning

confidence: 99%

Angle resolved scatter measurement of bulk scattering in transparent ceramics

et al. 2015

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Bulk scattering in polycrystalline laser materials (PLM), due to non-uniform refractive index across the bulk, is regarded as the primary loss mechanism leading to degradation of laser performance with higher threshold and lower output power. The need for characterization techniques towards identifying bulk scatter and assessing the quality. Assessment of optical quality and the identification of bulk scatter have been by simple visual inspection of thin samples of PLMs, thus making the measurements highly subjective and inaccurate. Angle Resolved Scatter (ARS) measurement allows for the spatial mapping of scattered light at all possible angles about a sample, mapping the intensity for both forward scatter and back-scatter regions. The cumulative scattered light intensity, in the forward scatter direction, away from the specular beam is used for the comparison of bulk scattering between samples. This technique employ the detection of scattered light at all angles away from the specular beam directions and represented as a 2-D polar map. The high sensitivity of the ARS technique allows us to compare bulk scattering in different PLM samples which otherwise had similar transmitted beam wavefront distortions.

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“…As these sesquoxides (Y2O3, Lu2O3, and Sc2O3) have higher thermal conductivity compared to YAG (13 -16 W/m-K vs. ~ 11 W/m-K), they appear to be better suited for high laser power applications. As the sesquoxides materials are refractory in nature, with melting points higher than 2400 °C, reproducibility in growing large dimension single-crystal, of very high purity and optically transparent, has proven to be expensive and difficult [2,3,4].…”

Section: Introductionmentioning

confidence: 99%

Transmitted beam profile for determining bulk scattering in transparent ceramics

et al. 2015

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Bulk scattering in polycrystalline laser materials (PLM), due to non-uniform refractive index distribution across the bulk, is regarded as the primary loss mechanism leading to degradation of laser performance with higher threshold and lower output power. There is a need for characterization techniques, towards identifying bulk scatter and assessing the quality. Assessment of optical quality and the identification of bulk scatter have been by simple visual inspection of thin samples of PLMs, thus making the measurements highly subjective and inaccurate. Transmitted Beam Wavefront Profiling (TBWP) allows for the direct and quick imaging of the distortions introduced by bulk scattering, which is a direct manifestation of the presence of refractive index inhomogeneities in the PLM sample. As a laser beam propagates through the PLM sample, different regions of the incident beam experience different refractive index profiles, which cause spatial distortions to the beam. TBWP is able to directly and quickly image these distortions introduced to a propagating laser beam caused by the presence of bulk scattering in the PLMs.

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Preparation and properties of crystalline laser oxide materials

Cited by 20 publications

References 6 publications

Revisiting the Hydrothermal growth of YAG

Revisiting the Hydrothermal growth of YAG

Angle resolved scatter measurement of bulk scattering in transparent ceramics

Transmitted beam profile for determining bulk scattering in transparent ceramics

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