Efficient Continuous-Wave 1053-nm Nd:GYSGG Laser With Passively Q-Switched Dual-Wavelength Operation for Terahertz Generation

Zhong, Kai; Sun, Chongling; Yao, Jianquan; Xu, Degang; Xie, Xinyi; Cao, Xiaolong; Zhang, Qingli; Luo, Jianqiao; Sun, Dunlu; Yin, Shi

doi:10.1109/jqe.2013.2246545

Cited by 40 publications

(17 citation statements)

References 19 publications

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“…An example of this is the 1053 nm laser line which is close to the σ-polarized wavelength generated in Nd:YLF. Although the stimulated emission cross-section was much smaller (1/5 of that at 1061.5 nm), it was possible to achieve pure CW 1053 nm laser generation in Nd:GYSGG by optimizing the cavity mirror coatings to suppress the oscillation at 1058.4 and 1061.5 nm [25]. The maximum output power was 4.17 W and the optical-optical conversion efficiency reached 33.9%.…”

Section: Nd:gysgg Laser Operating In the 105-111 μM Rangementioning

confidence: 99%

Laser Performance of Neodymium- and Erbium-Doped GYSGG Crystals

Zhong

2019

Crystals

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Garnet crystals possess many properties that are desirable in laser host materials, e.g., they are suitable for diode laser (LD) pumping, stable, hard, optically isotropic, and have good thermal conductivity, permitting laser operation at high average power levels. Recently, a new garnet material, GYSGG, was developed by replacing some of the yttrium ions (Y3+) with gadolinium ions (Gd3+) in YSGG, demonstrating great potential as a laser host material. GYSGG crystals doped with trivalent neodymium ion (Nd3+) and erbium ions (Er3+) were successfully grown for laser generation in the near- and mid-infrared range, with some of the laser performances reaching the level of mature laser gain media. This paper gives an overview of the achievements made in Nd3+- and Er3+-doped GYSGG lasers at different wavelength ranges. Additionally, full descriptions on Q-switching, mode-locking and wavelength-selecting methods for Nd:GYSGG, and the mechanisms of power scaling by co-doping sensitizers and deactivators in Er:GYSGG, are given. It is expected that this review will help researchers from related areas to quickly gain an understanding of these laser materials and promotes their commercialization and applications.

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Section: Nd:gysgg Laser Operating In the 105-111 μM Rangementioning

confidence: 99%

Laser Performance of Neodymium- and Erbium-Doped GYSGG Crystals

Zhong

2019

Crystals

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“…[20] The antiradiation crystal GYSGG doped with Nd 3+ shows an excellent dual-wavelength laser characteristic. [21][22][23][24] Besides, a high-power 2.79 µm wavelength output can be realized in the YSGG crystal doped with Er 3+ ions. [25] In further, the pure crystals such as YSGG and GYSGG can also be thermally bonded as endcapping to improve the laser performance of YSGG/Er:YSGG and GYSGG/Er,Pr:GYSGG composite crystals.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Growth and Properties of Six Garnet Single Crystals with Large Lattice Constants

Han

Sun

Zhang

et al. 2021

Crystal Research and Technology

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Large lattice constant Y 3 Al 5 O 12 , Gd 3 Ga 5 O 12 (GGG), Y 3 Sc 2 Ga 3 O 12 (YSGG), Gd 3 Sc 2 Ga 3 O 12 , Ca 0.4 Mg 0.25 Zr 0.65 Gd 2.6 Ga 4.1 O 12 (CaMgZr:GGG), and Gd 1.17 Y 1.83 Sc 2 Ga 3 O 12 (GYSGG) substrate crystals with 2 in. in diameter are grown by the Czochralski (Cz) method, their physical, chemical, and optical properties are analyzed and compared in details. The X-ray rocking curves (XRCs) illustrate that the as-grown crystals possess high crystalline quality. The lattice constants of six crystals are calculated and that of GYSGG can be easily adjusted in the range of 1.2450-1.2565 nm by changing the Gd/Y proportion. The dislocation densities on the (111)-crystalline face are about 10 2 cm −2 order of magnitude. The thermal conductivities of six crystals are measured to be 11.72, 8.98, 6.83, 5.45, 4.67, and 4.66 W m −1 K −1 , respectively. It is found that the thermal expansion coefficients of six crystals can be reduced by annealing at 1273 K for 60 h. In addition, the transmission spectra show that the six crystals have excellent transparency and the coefficients of the Sellmeier equation are fitted by the calculated refractive indices. These results of the six crystals can provide the necessary parameters and references for the selection of suitable substrate materials or laser host crystals.

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“…Taking advantage of stimulated Raman scattering (SRS) effect of YVO 4 crystal, [ 13 ] multiple wavelength lasers including fundamental and Raman lasers oscillating simultaneously have been developed [ 14 ] with actively Q‐switching and passively Q‐switching technology, [ 15,16 ] which have a wide range of applications in the fields of space optical communication, [ 17 ] laser sensing, [ 18 ] digital holography technology, [ 19 ] and nonlinear frequency conversion. [ 20 ] In particular, the small‐spaced dual‐wavelength laser has been used to generate terahertz waves through difference frequency, [ 21 ] which have been widely used in human medical imaging and biological detection. [ 22 ] Compact eye‐safe 1525 nm actively Q‐switched Nd:YVO 4 self‐Raman laser has been converted from 1342 nm fundamental laser with 890 cm −1 Raman shift line.…”

Section: Introductionmentioning

confidence: 99%

Manipulation of Polarizations with Crystalline Orientation for an Elliptically Polarized Passively Q‐Switched Raman Laser

Yang

Lin

et al. 2021

Annalen der Physik

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Polarization control of dual‐wavelength high peak power Raman lasers based on passively Q‐switched technology and yttrium vanadate (YVO4) crystal are widely used for generating novel laser sources, terahertz wave, material processing, and manipulating microparticles. However, the Raman lasers are usually linear polarization. Here, elliptical polarizations with controllable ellipticity and azimuthal angle are manipulated by adjusting the crystalline orientation of a‐cut YVO4 crystal in a passively Q‐switched Raman laser constructed with a Cr4+,Nd3+:Y3Al5O12 (Cr,Nd:YAG) crystal and a a‐cut YVO4 crystal. The ellipticity of the elliptically polarized dual‐wavelength Raman laser varies in a sinusoid modulation as a‐cut YVO4 crystal rotates with respect to the major axis of the intracavity fundamental laser and increases with applied pump power. The azimuthal angle varies in the same speed as a‐cut YVO4 crystal rotates. Anisotropic behavior of sinusoidal modulation of output power, pulse energy, and peak power is observed as a‐cut YVO4 crystal rotates. There are four peaks and four troughs for ellipticity, output power, pulse energy, and peak power within a 360° rotation of a‐cut YVO4 crystal. This work provides a solid and simple method for developing elliptical polarization controllable dual‐wavelength passively Q‐switched Raman laser with high peak power for various potential applications.

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Efficient Continuous-Wave 1053-nm Nd:GYSGG Laser With Passively Q-Switched Dual-Wavelength Operation for Terahertz Generation

Cited by 40 publications

References 19 publications

Laser Performance of Neodymium- and Erbium-Doped GYSGG Crystals

Laser Performance of Neodymium- and Erbium-Doped GYSGG Crystals

Investigation on the Growth and Properties of Six Garnet Single Crystals with Large Lattice Constants

Manipulation of Polarizations with Crystalline Orientation for an Elliptically Polarized Passively Q‐Switched Raman Laser

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