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ABSTRACT: We report an efficiency-enhanced mid-infrared generation via optical parametric down conversion. A tandem periodically-poled MgO-doped stoichiometric lithium tantalate crystal is used to realize on-chip generation and amplification of mid-infrared radiation inside an optical parametric oscillator cavity. We achieved 21.2% conversion efficiency (24% slope efficiency), which is among the highest efficiencies for the pump-to-mid-infrared conversion, with 1064 nm Nd class laser pump. The maximum average output power at 3.87 μm reached 635 mW with a 3.0 W pump.
Optics Express 08/2011; 19(18):17500-5. · 3.59 Impact Factor
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Y H Liu,
Z D Xie,
S D Pan,
X J Lv,
Y Yuan, X P Hu,
J Lu,
L N Zhao,
C D Chen,
G Zhao,
S N Zhu
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ABSTRACT: In this Letter, we demonstrate a nonlinear-mirror (NLM) mode-locked diode-pumped solid-state Nd:YVO4 laser operating at 1342 nm, in which the NLM comprises a periodically poled LiNbO3 crystal and a dichroic mirror. The self-starting threshold for cw mode locking is 1.5 W, which is significantly lower than that of saturable absorber mode locking. An average power of 1.52 W at 1342 nm is obtained under diode pump power of 10 W at 808 nm, with the slope efficiency being up to 16.8%. The pulse width and the repetition rate of the mode-locked laser output are about 9.5 ps and 101 MHz, respectively.
Optics Letters 03/2011; 36(5):698-700. · 3.40 Impact Factor
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ABSTRACT: We propose in this paper a chirped-quasi-periodic structure using the projection method. This type of new structure combines the advantages of chirped and quasi-periodic structures, and can be used for both multiple quasi-phase-matching and multiple bandwidths control. Numerical simulation of second-harmonic generation performance is in good agreement with the Fourier spectrum of the structure.
Optics Express 07/2010; 18(14):14717-23. · 3.59 Impact Factor
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ABSTRACT: We demonstrate a compact all-solid-state yellow laser source based on Q-switched dual-wavelength Nd:YAG laser and periodically-poled LiTaO(3) crystal. 589-nm yellow light was generated by single-pass sum-frequency generation of the fundamental IR waves at 1064 and 1319 nm. The maximum output power of yellow light was 506 mW and the corresponding conversion efficiency was approximately 5.5% [W(-1)cm(-1)].
Optics Express 06/2010; 18(13):13331-6. · 3.59 Impact Factor
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ABSTRACT: We demonstrate a new type of arc-shaped Cerenkov second-harmonic generation in a hexagonally poled LiTaO3 planar optical waveguide. Scattering of fundamental light, arising from domain walls and other imperfections on the surface and inside the waveguide, is found to be involved in such an optical parametric process, which is enhanced in the modulated domain structure by quasi-phase matching. One can use the Cerenkov second-harmonic arc to study the structure information of a nonlinear optical waveguide and to characterize the scattering in the waveguide.
Journal of Physics D Applied Physics 10/2009; 42(21):215103. · 2.54 Impact Factor
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ABSTRACT: A dual-color laser of red at 671 nm and ultraviolet (UV) at 411 nm was generated from dual-wavelength fundamental waves at
1342 and 1064 nm with a single periodically poled LiTaO3 (PPLT) optical superlattice. The PPLT sample used consists of two segments in a series: the first segment has a period of
14.55 μm for the second-harmonic generation (SHG) of 1342 nm and the second segment has periods of around 10.3 μm for the
generation of UV light by sum-frequency mixing (SFG) of 1064 and 671 nm. An average output power of 3 and 79 mW for UV and
red, respectively, has been obtained.
Laser Physics 10/2008; 18(11):1323-1327. · 3.61 Impact Factor
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ABSTRACT: We demonstrate a high-power red-green-blue laser source based on the quasi-phase-matching and intermittent oscillating dual-wavelength laser technique. A cascaded LiTaO3 superlattice was used to achieve the generation of red light at 660 nm, green light at 532 nm, and blue light at 440 nm to obtain the output of red-green-blue laser light from a diode-side-pumped Q-switched intermittent oscillating dual-wavelength Nd:YAG laser. The average output power of red-green-blue of 1.01 W was achieved under the total fundamental power of 5.1 W, which corresponds to the conversion efficiency of 20%.
Optics Letters 03/2008; 33(4):408-10. · 3.40 Impact Factor
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ABSTRACT: A scatheless visualization has demonstrated that the engineered and spontaneous domains of lithium niobate (LiNbO3) crystal can be delineated by means of the nanoparticle decoration. These nanoparticles were monodispersed in nonpolar solvent and negatively charged under the existence of aerosol-OT (AOT or sodium di-2-ethylhexylsulfosuccinate). This method was based on the process of electrostatic interaction, in which the LiNbO3 crystal wafers were heated in the presence of decorating colloid solvent. The charged nanoparticles deposited preferentially on the surfaces of those domains with the opposite charges. The delineated patterns corresponded with the polarization property of domain structures and consequently provided a domain contrast image with resolution down to micron scale. This decoration technique is effective, easily operated, nondestructive for sample, noninvasive for human body, and especially, is more suitable for the domain mapping of oxide ferroelectric crystals. In addition, the initial exploration of the model of such decoration process is also presented in this article.
Journal of Applied Physics 03/2007; 101(6):064107-064107-6. · 2.17 Impact Factor
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ABSTRACT: High-power blue light was generated from a diode-side-pumped Q-switched 1319nm Nd:YAG laser with a periodically poled, stoichiometric
LiTaO3 (PPSLT) crystal. The PPSLT sample used in this experiment consists of two segments in series: the first segment has a period
of 14.08μm for the second harmonic generation (SHG) and the second segment has periods of around 4.6μm for the generation
of blue light by mixing fundamental and SH. An average power of 466mW of a 440nm blue light was obtained at the fundamental
power of ∼5.4W with a conversion efficiency of 8.6%. The output power fluctuated by 3% over a half-hour period. This result
indicates that our scheme is a practical method to construct a reliable compact blue laser.
Applied Physics B 02/2007; 87(1):91-94. · 2.19 Impact Factor
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ABSTRACT: High power red light was generated from a periodically-poled stoichiometric LiTaO3 (PPSLT) by single-pass frequency doubling of a diode-side-pumped, Q-switched Nd:YAG laser at 1319nm. An average power of
2.4W of the 660nm red light was obtained at the fundamental power of ∼5.4W with the conversion efficiency up to 44.4% and
with low fluctuation down to 2%. The high efficiency and stability at the red output indicate that it is a practical method
to construct a reliable compact red laser.
Applied Physics B 12/2006; 86(2):265-268. · 2.19 Impact Factor
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ABSTRACT: A compact chirped pulse optical parametric amplifier centered at 1064 nm in periodically poled LiTaO<sub>3</sub> was demonstrated. The total single pass gain of ∼10<sup>6</sup> and ∼10.3% conversion efficiency were achieved in one OPA stage with low pump energy.
Quantum Electronics and Laser Science Conference, 2005. QELS '05; 06/2005
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ABSTRACT: An efficient generation of red light in a periodically-poled nearly-stoichiometric LiTaO3 (PPSLT) by extracavity single-pass frequency doubling of a diode-pumped, Q-switched Nd:YVO4 laser at 1342 nm was realized. An average power of 1.4 W of the 671 nm red light is obtained at the fundamental power of ∼2.8 W with the conversion efficiency of 50%. The high conversion efficiency and steady output of red light indicate that the thick PPSLT is a competitive candidate for frequency conversion in order to construct a compact all-solid-state red laser.
Applied Physics Letters 07/2004; 85(2):188-190. · 3.84 Impact Factor
