Large aperture N31 neodymium phosphate laser glass for use in a high
               power laser facility

Hu, Lili; Chen, Shubin; Tang, Jie; Wang, Biao; Meng, Tao; Chen, Wei; Lei, Wen; Hu, Jian; Li, Shunguang; Xu, Yujie; Jiang, Youen; Zhang, Junzhou; Jiang, Zhonghong

doi:10.1017/hpl.2014.4

Cited by 57 publications

(32 citation statements)

References 9 publications

(11 reference statements)

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“…Nd‐doped phosphate laser (PL) glass is an ideal gain medium for high‐peak‐power solid‐state lasers because of its high storage capacity for optical energy . This type of glass has been successfully used in inertial confinement fusion laser systems, such as the NIF system in US, the LMJ system in France, and the Shenguang system in China . However, the poor water‐resistance of the PL glasses limits their some more applications.…”

Section: Introductionmentioning

confidence: 99%

Effects of water immersion and humid weathering on the near‐surface mechanical properties of phosphate laser glass

Jiang

Zhang

et al. 2018

J Am Ceram Soc

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In this paper, the effect of water immersion and humid weathering on the nearsurface mechanical properties of phosphate laser (PL) glass was investigated using nanoindentation. The results indicate that, in the water immersion condition, the reduced modulus and nano-hardness of PL glass decrease first, then increase and finally keeps unchanged with the increase in immersion duration; however, in the humid weathering condition, they decrease monotonously. The reaction mechanism occurring between water molecules and the glass network, especially during the later stage of the reaction process, determines the near-surface mechanical properties and their differences when exposed to water and/or humid air. The results in this paper provide additional insight into the nano-mechanics of glass surfaces, which also help understand the surface alteration process of phosphate laser glass during machining, storage, and serving in wet environments.

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Section: Introductionmentioning

confidence: 99%

Effects of water immersion and humid weathering on the near‐surface mechanical properties of phosphate laser glass

Jiang

Zhang

et al. 2018

J Am Ceram Soc

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“…So far, only silicate and phosphor glasses have been used as laser glass [19]. Other rare-earth doped glasses are yet to be drawn into fiber.…”

Section: Introductionmentioning

confidence: 99%

Spectral Properties of Er3+/Tm3+ Co-Doped ZBLAN Glasses and Fibers

et al. 2017

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A series of Er3+/Tm3+ co-doped fluoride (ZBLAN) glasses and fibers was prepared and their fluorescence spectra was measured under excitation at 793 nm and 980 nm. Correlation between the self-absorption effect of rare-earth ions and the shift of the emission peak was investigated. With the increasing length of fiber, the emission peaks red-shift when self-absorption occurs at the upper level of emission transition or blue-shift when that occurs at the lower level. As a result of the strong self-absorption effect, Er3+/Tm3+ co-doped fibers mainly yield 1390–1470, 1850–1980, and 2625–2750 nm emissions when excited at 793 nm, and 1480–1580, 1800–1980, and 2625–2750 nm emissions when excited at 980 nm. Further, a broadband emission in the range of 1410–1580 nm covering the S + C communication band was obtained by the dual-pumping scheme of 793 nm and 980 nm. Results suggest that the dual-pumping scheme would be more effective and important for an Er3+/Tm3+ co-doped fiber amplifier working in the S + C communication band.

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“…On one hand, to realize the first method, the soft glasses with much higher rare earth solubility than silica, such as silicate glass [4], phosphate glass [5,6], germanium glass [7], and fluoride glass [8], might be ideal candidates as the fiber matrix. In addition, adjusting the refractivity of soft glasses is much easier than silica glass [9], making it possible to acquire a much smaller numerical aperture (NA) and thus much larger single-mode core. On the other hand, some techniques including drilling [10], extruding [11], and casting [12] can be used to acquire a DC fiber with noncircular inner cladding.…”

Section: Introductionmentioning

confidence: 99%

Yb–Er co-doped phosphate fiber with hexagonal inner cladding

Lei

Wang

et al. 2016

Appl. Phys. B

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drawbacks. Drilling is time-consuming and short-length limited. Extruding method is only feasible for glasses with low softening temperature and is high cost because the dies used to acquire the certain shape are easily destroyed by the high temperature and high pressure imposed by the extruding instrument. Casting technique is also complicated in manufacturing process, and the acquired glasses are inhomogeneous. By comparison, the stack-and-draw method might be an alternative way to reduce the symmetry of the fiber's inner cladding. In the first place, acquiring an asymmetrical inner cladding such as rectangle, hexagon, and D shape is easy by stack-and-draw method [13,14]. On the other hand, this method is economic and is feasible for all types of glasses.In this paper, an Yb-Er co-doped phosphate doubleclad fiber with hexagonal inner cladding was fabricated with stack-and-draw method. The concentration of the Yb and Er ions is 6 and 0.5 wt%, respectively. Output power of 4.9 W was extracted from a 55-cm-long fiber with 30 % slope efficiency.The compositions of the undoped outer cladding glass G2, inner cladding glass G1 and Er-Yb co-doped core glass G0 are 2 O 3 , respectively. The concentration of the Yb and Er ions is 6 and 0.5 wt%, respectively. The measured refractive indices of the undoped outer cladding glasses G2, inner cladding glasses G1, and Er-Yb co-doped core glasses G0 are 1.5133, 1.5378, and 1.5398 at 1.55 µm, respectively, measured by the V-prism method with accuracy of 5 × 10 −5 . The luminescence spectrum and luminescence decay of G0 are shown in Figs. 1 and 2. The life time at 1535 nm is measured to be 8.2 ms. Stack-and-draw method was used to prepare the fiber preform which was then fed into the Abstract An Yb-Er co-doped phosphate glass doubleclad fiber with hexagonal inner cladding was fabricated by stack-and-draw method. Output power of 4.9 W was extracted with slope efficiency of 30 % from the fiber with 55 cm in length.

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Large aperture N31 neodymium phosphate laser glass for use in a high power laser facility

Cited by 57 publications

References 9 publications

Effects of water immersion and humid weathering on the near‐surface mechanical properties of phosphate laser glass

Effects of water immersion and humid weathering on the near‐surface mechanical properties of phosphate laser glass

Spectral Properties of Er3+/Tm3+ Co-Doped ZBLAN Glasses and Fibers

Yb–Er co-doped phosphate fiber with hexagonal inner cladding

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