J. Xia

Changchun University of Science and Technology, Changchun, Fujian, China

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Publications (27)58.27 Total impact

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    ABSTRACT: We report for the first time an efficient CW laser emission at 560 nm by sum-frequency mixing of the fundamental and first-Stokes fields generated within an Nd:YVO4-BaWO4 Raman laser. Intracavity sumfrequency mixing with LiB3O5 (LBO) nonlinear crystal yielded 1.12 W of visible yellow-green emission; the output power stability over 4 h is better than 3.3%. The laser beam quality M 2 factors are 1.84 and 2.43 in both horizontal and vertical dimensions respectively.
    Laser Physics 04/2011; 21(4):667-669. · 1.03 Impact Factor
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    ABSTRACT: The continuous-wave (CW) laser properties of an efficient diode-pumped Nd:YAP crystal operating at 1.43 μm formed with a simple plane-concave cavity have been studied. With the incident pump power of 17.8 W, an output power of 2.2 W was obtained, giving an optical conversion efficiency of 12.4% and a slope efficiency of 14.7%. The beam quality factor M2 was less than 1.2. The power stability was less 2.4% in 60 minutes. (© 2011 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA) (© 2011 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 01/2011; 8(4):286. · 2.96 Impact Factor
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    ABSTRACT: Efficient and compact is generated by intracavity frequency doubling of a diode-pumped Sr1−x La x − y Nd y Mg x Al12 − x O19(Nd:ASL) laser at 906 nm. With 10.3 W of diode pump power and the frequency-doubling crystal LiB3O6 (LBO), a maximum output power of 281 mW in the blue spectra] range at 453 nm has been achieved, corresponding to an optical-to-optical conversion efficiency of 2.7%; the output power stability over 4 h is better than 3.8%.
    Laser Physics 01/2011; 21(3):477-479. · 1.03 Impact Factor
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    ABSTRACT: A high-power diode -pumped Nd3+:YAl3(BO3)4 (Nd:YAB) laser emitting at 1338 nm is described. At the incident pump power of 9.8 W, as high as 734 mW of continuous-wave (CW) output power at 1338 nm is achieved. The slope efficiency with respect to the incident pump power was 9.0%. To the best of our knowledge, this is the first demonstration of such a laser system. The output power stability over 60 min is better than 2.6%. The laser beam quality M 2 factor is 1.21.
    Laser Physics 01/2011; 21:861-863. · 1.03 Impact Factor
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    ABSTRACT: Efficient and compact blue laser output at 468 nm is generated by intracavity frequency doubling of a continuouswave (CW) diode-pumped Nd:CNGG laser at 935 nm. With 17.8 W of diode pump power and the frequency-doubling crystal BiB3O6 (BiBO), a maximum output power of 490 mW in the blue spectral range at 468 nm has been achieved, corresponding to an optical-to-optical conversion efficiency of 2.8%; the output power stability over 4 h is better than 2.6%. To the best of our knowledge, this is first work on intracavity frequency doubling of a diode pumped Nd:CNGG laser at 935 nm. (© 2011 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA) (© 2011 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 12/2010; 8(2):103 - 106. · 2.96 Impact Factor
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    ABSTRACT: We report for the first time an efficient continuous wave (CW) laser emission at 561 nm by sum-frequency mixing of the fundamental and first-Stokes fields generated within an Nd:KGd(WO4)2 self-Raman laser. Intracavity sum-frequency mixing with LiB3O5 (LBO) nonlinear crystal yielded 570 mW of visible yellow-green emission; the output power stability over 4 h is better than 4.6%. The laser beam quality M2 factors are 1.54 and 2.13 in both horizontal and vertical dimensions respectively. (© 2011 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA) (© 2010 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 11/2010; 8(1):21 - 23. · 2.96 Impact Factor
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    ABSTRACT: We report a diode-pumped Nd:YVO4 laser emitting at 880 nm based on the 4F3/2 – 4I9/2 transition for the first time. A power of 1.13 W at 880 nm has been achieved in continuous-wave operation with a fiber-coupled laser diode emitting 28.6 W at 808 nm. Furthermore, intracavity secondharmonic generation in continuous-wave mode has also been demonstrated with a power of 233 mW at 440 nm by using a BiB3O6 (BiBO) nonlinear crystal. The fluctuation of the blue output power was better than 2.3%. The beam quality M2 value is 1.2. (© 2010 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 06/2010; 7(7):495 - 497. · 2.96 Impact Factor
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    ABSTRACT: We present for the first time laser architecture to obtain continuous-wave yellow radiation at 594 nm. The choice of crystals (Nd:LuVO4 for emission at 1343 nm and Nd:YAG for emission at 1064 nm) was guided by laser performance. A part of the pump power was then absorbed by the Nd:LuVO4 crystal, the remaining was used to pump the Nd:YAG crystal. Intracavity sum-frequency mixing at 1343 and 1064 nm was realized in a KTiOPO4 (KTP) crystal to reach the yellow radiation. We obtained a continuous-wave output power of 312 mW at 594 nm with a pump laser diode emitting 18.4Wat 808 nm. (© 2010 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 06/2010; 7(9):634 - 636. · 2.96 Impact Factor
  • Y.F. Lü, X.H. Zhang, J. Xia
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    ABSTRACT: A Nd:LuVO4 crystal was pumped directly into the emitting level by a laser diode at 915 nm for the first time to our knowledge. We achieved an output power of 6.7 W at 1066 nm for an absorbed pump power of 8.4 W, corresponding to an optical-to-optical conversion efficiency of 79.8%. A decrease of about 20% in heat generation under 915 nm pumping was observed compared with the 880 nm pumping. (© 2010 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 05/2010; 7(7):487 - 490. · 2.96 Impact Factor
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    ABSTRACT: We report a diode-pumped Nd:YAG laser emitting at 899 nm based on the 4F3/2 – 4I9/2 transition. A power of 1.04 W at 899 nm has been achieved in continuous-wave operation with a fiber-coupled laser diode emitting 19.2 W at 809 nm. Furthermore, intracavity second-harmonic generation in continuous-wave mode has also been demonstrated with a power of 284 mW at 449.5 nm by using a BiB3O6 (BiBO) nonlinear crystal. The fluctuation of the blue output power was better than 2.8%. The beam quality M2 value is 1.3. (© 2010 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 03/2010; 7(5):347 - 350. · 2.96 Impact Factor
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    ABSTRACT: We present an Yb:KY(WO4)2 (Yb:KYW) laser emitting at 981 nm intracavity pumped by a 912 nm diode-pumped Nd:GdVO4 laser. A 808 nm diode laser is used to pump the Nd:GdVO4 crystal emitting at 912 nm, and the Yb:KYW laser emitting at 981 nm intracavity pumped at 912 nm. This configuration enabled us to indirectly diode-pump this ytterbium doped crystal, and to obtain 1.12 W output power at 981 nm for 19.6 W of incident pump power at 808 nm. Furthermore, intracavity second harmonic generation has also been demonstrated with a power of 106 mW at 490.5 nm by using a LBO nonlinear crystal. (© 2010 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 03/2010; 7(5):343 - 346. · 2.96 Impact Factor
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    ABSTRACT: 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. (© 2010 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 03/2010; 7(5):335 - 338. · 2.96 Impact Factor
  • Y.F. Lü, J. Xia, X.H. Zhang
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    ABSTRACT: We describe the output performances of the 916 nm 4F3/2 → 4I9/2 transition in Nd:LuVO4 under in-band pumping with diode laser at the 880 nm wavelength, directly into the 4F3/2 emitting level. An end-pumped Nd:LuVO4 crystal yielded 11.7 W of continuous-wave output power for 23.5 W of absorbed pump power. The slope efficiency with respect to the absorbed pump power was 66.6%. Furthermore, 5.9 W 458 nm deep-blue light was acquired by frequency doubling, resulting in an opticalto-optical efficiency with respect to the absorbed pump power of 25.1%. Comparative results obtained for the pump with diode laser at 809 nm, into the highly-absorbing 4F5/2 level, are given in order to prove the advantages of the in-band pumping. (© 2010 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 01/2010; 7(2):120 - 123. · 2.96 Impact Factor
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    ABSTRACT: We present a high-efficiency Nd: LiYF4 (Nd:YLF) laser operating at 1321nm pumped directly into the emitting level, 4F3/2. The linear polarization of the pump diode laser was maintained by a short fiber. At the absorbed pump power of 7.3W, as high as 3.6W of continuous-wave output power at 1321nm is achieved. The slope efficiency with respect to the absorbed pump power was 0.52. To the best of our knowledge, this is the first demonstration of such a laser system. Comparative results obtained for the pump with a diode laser at 806nm, into the highly absorbing 4F5/2 level, are given in order to prove the advantages of 880nm wavelength pumping.
    Applied Physics B 01/2010; 98(2):305-309. · 1.78 Impact Factor
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    ABSTRACT: The continuous-wave high efficiency laser emission of Nd:YAG at the fundamental wavelength of 1319 nm and its 659.5-nm second harmonic obtained by intracavity frequency doubling with an LBO nonlinear crystal is investigated under pumping by diode laser at 885 nm (on the 4 F 3/2 → 4 I 13/2 transition). An end-pumped Nd:YAG crystal yielded 9.1 W at 1319 nm of continuous-wave output power for 18.2 W of absorbed pump power. The slope efficiency with respect to the absorbed pump power is 0.55. Furthermore, 5.2 W 659.5 nm red light is acquired by frequency doubling, resulting in an optical-to-optical efficiency with respect to the absorbed pump power of 0.286. Comparative results obtained for the pump with diode laser at 808 nm (on the 4 F 5/2 → 4 I 13/2 transition) are given in order to prove the advantages of the 885 nm wavelength pumping.
    Laser Physics 01/2010; 20(1):200-204. · 1.03 Impact Factor
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    ABSTRACT: We report a laser architecture to obtain continuous-wave blue radiation at 488 nm. A 808 nm diodepumped the Nd:YVO4 crystal emitting at 914 nm. A part of the pump power was then absorbed by the Nd:YVO4 crystal. The remaining was used to pump the Nd:YLF crystal emitting at 1047 nm. Intracavity sum-frequency mixing at 914 and 1047 nm was then realized in a LBO crystal to reach the blue radiation. We obtained a continuous-wave output power of 514 mW at 488 nm with a pump laser diode emitting 19.6 W at 808 nm.
    Laser Physics 01/2010; 20(7):1577-1579. · 1.03 Impact Factor
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    ABSTRACT: We present for the first time a dual-wavelength laser operation at 1064 and 914 nm in two NdYVO4 crystals. A 879 nm laser diode is used to pump the first Nd:YVO4 crystal emitting at 914 nm, and the second Nd:YVO4 laser emitting at 1064 nm intracavity pumped at 914 nm. A total output power of 4.28 W at the two fundamental wavelengths was achieved at the absorbed pump power of 13.8 W. The M2 values for 914 and 1064 nm lights at the maximum output power were found to be around 1.3 and 1.1, respectively.
    Laser Physics 01/2010; 20(4):737-739. · 1.03 Impact Factor
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    ABSTRACT: We present for the first time a Nd:YVO4 laser emitting at 1064 nm intracavity pumped by a 916 nm diode-pumped Nd:LuVO4 laser. A 809 nm laser diode is used to pump the Nd:LuVO4 crystal emitting at 916 nm, a Nd:YVO4 laser crystal was pumped at 916 nm and lased at 1064 nm. Intracavity sum-frequency mixing at 916 and 1064 nm was then realized in a LiB3O6 (LBO) crystal to reach the blue range. We obtained a continuous-wave output power of 216 mW at 492 nm under 19.6 W of incident pump power at 809 nm.
    Laser Physics 01/2010; 20(9):1810-1813. · 1.03 Impact Factor
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    ABSTRACT: We report efficient laser emission on the 914 nm 4 F 3/2 to 4 I 9/2 transition in Nd:YVO4 under the pump with diode lasers at 888 nm for the first time. Continuous wave 6.57 W output power at 914 nm is obtained from a V-type resonator under 18.3 W of absorbed pump power; the slope efficiency with respect to the absorbed pump power was 60.6%. Moreover, intracavity frequency doubling with BiB3O6 (BiBO) nonlinear crystal yielded 1.77 W of deep-blue light at 457 nm with beam quality characterized by an M2 factor of 1.25.
    Laser Physics 01/2010; 20(10):1877-1880. · 1.03 Impact Factor
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    ABSTRACT: We report for the first time a coherent radiation at 488 nm by intracavity sum-frequency generation of 914 nm Nd:YVO4 laser and 1047 nm Nd:YLF (Nd:YLiF4) laser. Blue laser is obtained by using a doubly folded cavity, type-I critical phase matching LBO (LiB3O5) crystal sum-frequency mixing. With total pump power of 32.2 W (13.4 W pump power for 1047 nm Nd:YLF laser and 18.8 W pump power for 914 nm Nd:YVO4 laser), TEM00 mode blue laser at 488 nm of 1.23Wis obtained. The power stability in 30 min is better than 2.8%. (© 2009 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
    Laser Physics Letters 11/2009; 6(12):860 - 863. · 2.96 Impact Factor