Efficient and tunable continuous-wave diode-pumped Yb^3+:Ca_4GdO(BO_3)_3 laser

Augé, F.; Balembois, François; Georges, Patrick; Brun, Alain; Mougel, F.; Aka, G.; Kahn‐Harari, A.; Vivien, D.

doi:10.1364/ao.38.000976

Cited by 46 publications

(12 citation statements)

References 13 publications

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“…Q-switched pulse laser was obtained, the output energy was 125 mj/pulse with a pulse duration of 1 ms at 200 Hz [75]. The best slope efficiency of the laser performances was 47.5% at 6 C, producing 191 mW output power at 1050 nm.…”

Section: Gdcob Used For a Laser Host Crystalmentioning

confidence: 99%

Other Borate Crystals

Chen

Sasaki

et al. 2012

Nonlinear Optical Borate Crystals

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A series of mixed borates of rare-earth elements and calcium with the composition R 2 CaB 10 O 19 (RCB) (R: rare-earth element) were synthesized by Wu et al., from the system of R 2 O 3 -CaO-B 2 O 3 in 1998 [1]. In 2001, the growth and structure of La 2 CaB 10 O 19 (LCB), one member of the RCB family, was reported [2]. LCB crystallizes in the monoclinic system and belongs to the C2 space group with two formula units per cell (Figure 4.1). Its lattice parameters were measured to be a ¼ 11.043 (3) The structure contains B 5 O 12 groups as the basic units. B 5 O 12 groups are linked together to form an infinite two-dimensional double layer by sharing O atoms with one another. The layer runs almost perpendicular to the caxis of the crystal. The La atoms are located in layers, while the Ca atoms are located between two layers. LCB crystal has a high transparency from ultraviolet (UV) to infrared range. The birefringence of LCB crystal at 1064 nm is 0.053, which allows to perform SHG and THG in LCB. The damage threshold was measured to be about 11.5 GW/cm 2 . An effective nonlinear optical coefficient d eff of LCB was measured to be 1.05 pm/V. In addition, LCB can be doped with other rare earth (RE) elements because of the existence of the La 3þ ions in LCB. So LCB is a promising nonlinear optical (NLO) and self-frequency doubling (SFD) crystal. Synthesis and Crystal Growth of LCB and RE:LCBIn 1998, a series of compounds with the composition R 2 CaB 10 O 19 (R: rare earth) including the LCB crystals were synthesized from the stoichiometric melt. In 2000, the Nd 3þ -doped LCB (Nd:LCB) with a size of 20 Â 17 Â 7 mm 3 was grown from the Nonlinear Optical Borate Crystals: Principles and Applications, First Edition. Nd 3þ was used to replace the La 3þ in LCB using different Nd concentrations to form Nd:LCB. For LCB RE:LCB crystal growth, flux method is convenient because the crystal decomposes above 900 C before melting at 1200 C. In 2002, pure LCB was grown from its stoichiometric melt by the top-seeded pulling method (TSSG, topseeded solution growth) by Xu et al. [4]. The morphology of LCB grown by TSSG method was then studied [5]. In 2003, Wu et al. studied the phase diagram of the binary system LaB 3 O 6 -CaB 4 O 7 by X-ray powder diffraction and differential thermal (DSC) analysis, and they found that LCB phase exists between lanthanum borate and calcium borate, and melts congruently with a melting point of 1065 C [6]. Thereafter, a series of rare earth-doped LCB such as Er:LCB [7,8], Ce:LCB [9], Nd,Yb:LCB [10], and Pr:LCB [11,12] were successfully grown by flux and TSSG method. To further enlarge the size and improve the optical quality of LCB crystals, people made more efforts to improve the crystal growth equipment and the growth conditions. For example, in 2005, Jing et al. made efforts to search for the new flux to grow LCB crystals and successfully grew the LCB with size of 30 Â 25 Â 9 mm from a new flux CaO-Li 2 O-B 2 O 3 [13]. It was also found that the morphological faces are most effected by the direction of ...

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Section: Gdcob Used For a Laser Host Crystalmentioning

confidence: 99%

Other Borate Crystals

Chen

Sasaki

et al. 2012

Nonlinear Optical Borate Crystals

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“…As we used a high reflective cavity, the roundtrip losses include only the passive losses L 946 and the absorption at 946 nm in the second laser crystal Nd:YAG. As described in [22], G 946 is a decreasing function of the intracavity power at 946 nm P 946 , and for a given pump power; according [23] it can be solved numerically to find the value of the output power P 946 out The intracavity power P 946 is given by…”

Section: Principlementioning

confidence: 99%

1064 nm Nd:YAG laser intracavity pumped at 946 nm and sum-frequency mixing for an emission at 501 nm

Zhang

Xia

et al. 2010

Laser Phys. Lett.

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We present for the first time a Nd:YAG laser emitting at 1064 nm intracavity pumped by a 946 nm diode-pumped Nd:YAG laser. A 809 nm laser diode is used to pump the first Nd:YAG crystal emitting at 946 nm, and the second Nd:YAG laser emitting at 1064 nm intracavity pumped at 946 nm. Intracavity sum-frequency mixing at 946 and 1064 nm was then realized in a LBO crystal to reach the cyan range. We obtained a continuous-wave output power of 485 mW at 501 nm with a pump laser diode emitting 25.4 W at 809 nm.

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“…This feature will greatly benefit room-temperature laser operation of this crystal. In the years since its appearance, intensive investigations have been carried out into the laser performance of Yb:GdCOB crystal [2][3][4][5][6]: a wide tunable range amounting to about 100 nm was demonstrated [2]; ultra-short laser pulses of 90 fs duration were generated in a mode-locked Yb:GdCOB oscillator [3]; in the continuous wave (cw) regime, output powers of ∼5-7 W were produced with end-pumped lasers [4][5][6]; strong anisotropy in cw laser performance was also revealed, with complex polarization state varying behavior being observed under certain operational conditions with Y-cut crystals [5].…”

Section: Introductionmentioning

confidence: 99%

Efficient high-energy passively Q-switched Yb:GdCa₄O(BO₃)₃ laser

et al. 2013

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A compact diode-pumped high-pulse-energy Yb:GdCa(4)O(BO(3))(3) laser passively Q-switched with a Cr(4+):YAG saturable absorber is demonstrated at room temperature. An output power of 1.05 W is generated at a pulse repetition rate of 2.5 kHz when the pump power absorbed is 7.7 W, with a slope efficiency determined to be 40%. The laser pulse generated is 10.0 ns in duration, with pulse energy as high as 420 μJ and peak power amounting to 42 kW.

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Efficient and tunable continuous-wave diode-pumped Yb^3+:Ca_4GdO(BO_3)_3 laser

Cited by 46 publications

References 13 publications

Other Borate Crystals

Other Borate Crystals

1064 nm Nd:YAG laser intracavity pumped at 946 nm and sum-frequency mixing for an emission at 501 nm

Efficient high-energy passively Q-switched Yb:GdCa₄O(BO₃)₃ laser

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Efficient and tunable continuous-wave diode-pumped Yb^3+:Ca_4GdO(BO_3)_3 laser

Cited by 46 publications

References 13 publications

Other Borate Crystals

Other Borate Crystals

1064 nm Nd:YAG laser intracavity pumped at 946 nm and sum-frequency mixing for an emission at 501 nm

Efficient high-energy passively Q-switched Yb:GdCa4O(BO3)3 laser

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Efficient high-energy passively Q-switched Yb:GdCa₄O(BO₃)₃ laser