Growth, spectroscopy and lasing of the Yb-doped monoclinic Gd2SiO5 in the prospect of hydrogen laser cooling with Lyman-α radiation

Cabaret, L.; Robert, J.; Lebbou, Kheirréddine; Brenier, A.; Cabane, H.

doi:10.1016/j.optmat.2016.11.007

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…Such a rotation was already reported for KGW:Nd [25] and it has been previously encountered in the monoclinic YCa 4 O(BO 3 ) 3 :Nd [27] and in other recent examples cited in [28]. The calculation procedure is: reading the crystal angular orientations in figure 3, launching the Gaussian beam mode through the crystal with the highest emission cross-section and calculating the near field pattern on the output plane mirror according to [19] and equation (1).…”

Section: Theoretical Modellingmentioning

confidence: 73%

Revealing modes from controlling an off-optical axis conical diffraction laser

Brenier¹

2017

Laser Phys.

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Thanks to controlling the off-optical axis propagation in the monoclinic KGd(WO4)2:Nd biaxial crystal used as a laser gain medium, we exhibited remarkable crescent laser modes and mode switching, demonstrating the preservation of the conical diffraction. We revealed an optical singularity in addition to the optical axis: the directions of polarization abrupt change of the highest emission cross-section mode, which leads to un-polarized lasing. The key explanation is a severe mode selection due to the threshold behavior of lasing. This is confirmed by a theoretical model taking into account a two-axes crystal rotation and including the conical diffraction behavior. The rotation around the two-fold b crystallographic axis of the frame which makes diagonal the imaginary part of the dielectric susceptibility tensor is exhibited.

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Section: Theoretical Modellingmentioning

confidence: 73%

Revealing modes from controlling an off-optical axis conical diffraction laser

Brenier¹

2017

Laser Phys.

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Use of the Laser Beam Deflection Technique for Thermo-Optic Coefficients Study in Gadolinium-Yttrium Oxyorthosilicate Doped with Erbium Ions

Yumashev,

Goman,

Pavlovski

et al. 2023

Prib. metody izmer.

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Results of use of the laser beam deflection technique for determination of thermo-optic coefficients (TOCs) of the Er3+-doped gadolinium-yttrium oxyorthosilicate crystal (Er3+:(GdY) SiO– Er:GYSO) are presented. A 0.1 at.% Er-doped gadolinium-yttrium oxyorthosilicate crystal was grown by the Czochralski method under nitrogen atmosphere. Raw materials such as Er2O3, Gd2O3, Y2O3, and SiO2 were weighed according to the formula (Er0.001Gd0.8995Y0.0995)2SiO5. Optical properties of the biaxial Er:GYSO crystal are described within the frame of the optical indicatrix with orthogonal principal axes Np , Nm , and Ng . To characterize the anisotropy of the TOCs a sample from the grown Er:GYSO crystal was prepared in a shape of a rectangular parallelepiped with dimensions of 7.0 (Np ) × 8.0 (Nm ) × 8.5 (Ng ) mm3. Each face of the sample is perpendicular to one of the optical indicatrix axes Np , Nm and Ng . For determination of the TOCs the laser beam deflection technique for a material with a linear temperature gradient is used. Measurements are performed at the wavelength of 632.8 nm. The thermal coefficient of the optical path (TCOP) for the Er:GYSO crystal measured at the wavelength of 632.8 nm at different light polarization E and propagation direction k were obtained. The TCOP values are positive for all directions of the light propagation k // Np , Nm , Ng . This means that the sign of the thermal lens which is directly related to the TCOP value will also be positive, and the positive thermal lens is then expected for Np Nm-, and Ng -cut Er:GYSO. Applying an analysis of the thermal lensing the dn /dT value for Yb:GYSO is estimated to be 6.5×10–6 K–1.

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Growth, spectroscopy and lasing of the Yb-doped monoclinic Gd2SiO5 in the prospect of hydrogen laser cooling with Lyman-α radiation

Cited by 2 publications

References 29 publications

Revealing modes from controlling an off-optical axis conical diffraction laser

Revealing modes from controlling an off-optical axis conical diffraction laser

Use of the Laser Beam Deflection Technique for Thermo-Optic Coefficients Study in Gadolinium-Yttrium Oxyorthosilicate Doped with Erbium Ions

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