8/18/2019 Type of Lasers-Nd:Yag and Nd:Glass

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Crystals Laser Crystals Nd:GLASS

High-power laser glass---Nd:glass(N21 and N31)

 Nd doped phosphate glass have been widely used in high average power laser solid statelasers，laser material processing, range finder and other industrial and scientificapplications。 

We mainly offers two types of Nd 3+ doped phosphate glasses－ N21and N31. Nd 3+ phosphateglasses are guaranteed in optical qualities such ashomogeneity, striation, stress birefringence, Ptinclusions etc. The different neodymium doping phosphate glasses are ready for your quest. We havestocked 0.7%, 3.0%, and 4.0% doped N31 and N21. N21- an Nd 3+ : phosphate glass isspecially developed for the LF1 # and LF2 # Laser Facility. It consist of two high powerlaser beams at 1.054um, each has an output aperture of 200mm with output power of 1012 W. Its operation represents a significant achievement of laser technology in China.This kind of glass exhibits the moderate cross section for stimulated emission and theexcellent chemical durability. N31－a new Nd 3+ : phosphate glass is speciallydeveloped for the LF12 # Laser Facility－at present the most powerful laser facility in

China（also called “Shengguang” in SIOM of China）It exhibits the nearly samequalification with HOYA LHG8. Table Properties of Nd 3+ -doped phosphate glass N21 N31

LASER PROPERTIES

 Nd 2 O 3 (wt%) 2.2 2.2 Nd 3+ conc. (10 20 ions/cm 3 ) 2.68 2.26Cross section for stimulated emission(10 -20 cm 2 ) 3.40±0.34.0±0.3lift time (usec) 330 340±10Fluorescence half-line width at 290ºK(Å) 240 201Center lasing wavelength (nm) 1059 1059OPTICAL PROERTIES

 Non-linear refractive index coeff.n 2 (×10－13 e.s.u) 1.3±0.1 1.1±0.1n（1053nm）  1.5652 1.5280n d 1.5758 1.5357n F 1.5731 1.5413n c 1.5820 1.5332Abbe value 65.3 66.2dn/dT (10 -6 /ºC)（20~100ºC）  -4.2 -4.3Coeff.of linear thermal expansion (10 -6 /ºC)（20~100ºC）11.0 10.7

Thermal coeff. (10 -6 /ºC)（20~100ºC）  1.9 1.4THERMAL PROPERTIES

8/18/2019 Type of Lasers-Nd:Yag and Nd:Glass

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Transformation temp.(ºC) 500 430Softening temp.(ºC) 530 475Coeff.of linear thermal expansion (10 -6 /ºC) (100~TgºC) 12.0 12.7Thermal conductivity (25ºC) (10 -3 W/cmºC) 5.53 5.58Specific heat ( 25ºC) (J/cm 3 ºC) 0.75 0.75CHEMICAL ROPERTIES

D w (H2O 100ºC 1hr)(wt. Loss%) 0.06 0.09

D A (HNO 3 pH2.2 100ºC 1hr) (wt. loss%)0.30

0.40

OTEHER ROPERTIES

Density(g/cm 3 ) 3.40 2.83Young's modulus (kgf/mm 2 ) 5640 5270Posson's ratio 0.27 0.27Knoop hardness (kg/cm 2 ) 650 630