Second harmonic generation in Yb doped YCa4O(BO3)3

Jang, Won Kweon; Ye, Qing; Eichenholz, Jason M.; Richardson, Martin; Chai, B. H. T.

doi:10.1016/s0030-4018(98)00387-3

Cited by 27 publications

(7 citation statements)

References 16 publications

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“…In the primitive cell of SCOB there were two B(1)O 3 and four B(2)O 3 triangles and two SmO 6 , four Ca(1)O 6 , and four Ca(2)O 6 octahedra. 13 From the data of the bond lengths, the (BO 3 ) 3− clusters form rigid BO 3 triangles, connecting the quasi-rigid Ca(1)O 6 octahedra and distorted SmO 6 and Ca (2) also has three Raman-active vibrational modes as a nondegenerate symmetric X-Y stretching (Ј 1 ), a doubly degenerate symmetric Y-X-Y stretching (Ј 2 ), and a triply degenerate symmetric Y-X-Y bending (Ј 5 ) mode. It is clear that all the degenerate vibrational modes belonging to the triangles and octahedra are sure to split into uni-modes in SCOB due to the Cm symmetry.…”

Section: Resultsmentioning

confidence: 99%

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Raman measurement and thermal properties of SmCa₄O(BO₃)₃ crystals

Xia

Zhang

et al. 2002

J. Mater. Res.

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SmCa 4 O(BO 3 ) 3 (SCOB) crystallizes in the noncentrosymmetric monoclinic space group Cm with cell parameters a ‫ס‬ 0.8129(5), b ‫ס‬ 1.6076(1), c ‫ס‬ 0.3584(1) nm, ␤ ‫ס‬ 101.36(2)°, and Z ‫ס‬ 2. Raman results showed that the characteristic spectra of SCOB are mainly contributed by the B-O triangles and partly by the Ca(1)-O octahedra. The structural rigidity of SCOB is mainly ascribed to the B-O bond stretching and bending modes and partly by the Ca(1)-O bonds. The rigid structure of the B-O triangles and the quasi-rigid structure of the Ca(1)-O octahedra are necessary to the SCOB crystal as a laser host. The large distortions of the Sm-O and Ca (2)-O octahedra intensify the polar forces and anisotropic lattice forces, which generally imply the best nonlinear properties possible for SCOB as a nonlinear optical material and piezocrystal. Thermal measurements show a larger value of the specific heat and three small expansion coefficients, which show that SCOB can allow a large temperature gradient, especially in the Y direction. Displacement parameters indicated that the thermal ellipsoids of the Sm and Ca(2) atoms had significantly large components along the b direction. Synthetical study indicated that the SCOB crystal should be outstanding as an efficient self-frequency doubled material.

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Section: Resultsmentioning

confidence: 99%

“…, and Nd-and Yb-doped YCOB and GCOB, [3][4][5][6] have attracted much attention. RE calcium oxyborate is attractive due to its advantages of a broad transparency range, a short ultraviolet absorption edge, a low laser threshold, and a high damage threshold.…”

Section: (Ycob) Gdca 4 O(bo 3 ) 3 (Gcob) Smca 4 O(bo 3 ) 3 (Scob)mentioning

confidence: 99%

Raman measurement and thermal properties of SmCa₄O(BO₃)₃ crystals

Xia

Zhang

et al. 2002

J. Mater. Res.

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“…Some borates are also excellent as a laser material for miniature lasers such as rare earth ͑RE͒ calcium oxyborate and their solid solutions. [11][12][13][14][15][16][17] ions are situated in this crystal field with m symmetry, lacking inversion symmetry. This condition increases the prob-ability of the parity-forbidden f → f transitions.…”

Section: Introductionmentioning

confidence: 99%

Raman and absorption spectra and thermal conductance of Er:Yb:GdCa4O(BO3)3 crystals

Xia

Zhao

Cheng

et al. 2004

Journal of Applied Physics

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Raman data and thermal expansion of Er:Yb:GdCa 4 O(BO 3 ) 3 ͑EYGCOB͒ crystals reveal that the crystal thermal conductance and thermomechanical properties are outstanding especially along the b direction. The Z-direction polarized absorbance of the b-direction wafer exhibits that the Yb 3ϩ ion is very effectual as a sensitizer. These indicate that the EYGCOB crystals are suitable as an infrared radiation laser at about 1500 nm by using a pump wavelength of about 1000 nm from an InGaAs diode laser.

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“…8 , 47.4 ) and (90 , 46 ) by using a pulsed Q-switched Nd : YAG laser [10]. For YCOB crystal, Jang et al [11] achieved 35% of SHG conversion efficiency in 25 mm long YCOB crystal along PM direction in the XZ main plane when the input power density is about 60 MW/cm 2 . Chen et al [12] calculated d ij for the first time and concluded that the optimum PM direction was out of the main plane.…”

Section: Introductionmentioning

confidence: 99%

Study on the Second-Harmonic Generation of YCa4O(BO3)3 Crystals along Various Phase-Matching Directions

Zhang

Cheng

Sun

et al. 2001

phys. stat. sol. (a)

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Large size and high-quality YCa 4 O(BO 3 ) 3 (YCOB) crystal can be grown using the conventional Czochralski pulling method. The theoretical calculations of the effective coefficient (d eff ) and the walk-off angles at 530 nm of YCOB along various phase-matching (PM) directions are reported. The PM direction along (q = 64.5 , j = 144.5 ) for YCOB crystal has the largest d eff . Secondharmonic generation (SHG) experiments were performed on YCOB crystal along various PM directions. The results show that in 6 mm long YCOB crystal, the SHG conversion efficiency is 39% along the PM direction (q = 64.5 , j = 144.5 ) at 80 MW/cm 2 input power density, which is larger than that along (q = 64.5 , j = 35.5 ) and the PM direction in the XZ main plane. The experimental result is in good agreement with the theoretical calculations.

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Second harmonic generation in Yb doped YCa4O(BO3)3

Cited by 27 publications

References 16 publications

Raman measurement and thermal properties of SmCa₄O(BO₃)₃ crystals

Raman measurement and thermal properties of SmCa₄O(BO₃)₃ crystals

Raman and absorption spectra and thermal conductance of Er:Yb:GdCa4O(BO3)3 crystals

Study on the Second-Harmonic Generation of YCa4O(BO3)3 Crystals along Various Phase-Matching Directions

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Second harmonic generation in Yb doped YCa4O(BO3)3

Cited by 27 publications

References 16 publications

Raman measurement and thermal properties of SmCa4O(BO3)3 crystals

Raman measurement and thermal properties of SmCa4O(BO3)3 crystals

Raman and absorption spectra and thermal conductance of Er:Yb:GdCa4O(BO3)3 crystals

Study on the Second-Harmonic Generation of YCa4O(BO3)3 Crystals along Various Phase-Matching Directions

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Raman measurement and thermal properties of SmCa₄O(BO₃)₃ crystals

Raman measurement and thermal properties of SmCa₄O(BO₃)₃ crystals