Er:YSGG/Er,Cr:YSGG Crystals


  • Rod Diameters: up to 15 mm
  • Diameter Tolerance: +0.0000 / -0.0020 in
  • Length  Tolerance: +0.040 / -0.000 in
  • Tilt / Wedge Angle: ±5 min
  • Chamfer: 0.005 ±0.003 in
  • Chamfer Angle: 45 deg ±5 deg
  • Product Detail

    Technical parameters

    Video

    Active elements from Erbium doped Yttrium Scandium Gallium Garnet crystals (Er:Y3Sc2Ga3012 or Er:YSGG), single crystals, are desinged for diode pumped solid-state lasers radiating in the 3 µm range. Er:YSGG crystals show the perspectiveness of their application alongside with the widely used Er:YAG, Er:GGG and Er:YLF crystals.
    Flash lamp pumped solid-state lasers based on Cr,Nd and Cr,Er doped Yttrium Scandium Gallium Garnet crystals (Cr,Nd:Y3Sc2Ga3012 or Cr,Nd:YSGG and Cr,Er:Y3Sc2Ga3012 or Cr,Er:YSGG) have a higher efficiency than those based on Nd:YAG and Er:YAG. Active elements manufactured from YSGG crystals are optimum for medium power pulse lasers with the repetition rates of up to several tens of cycles. The advantages of YSGG crystals compared with YAG crystals are lost when large size elements are used because of the worse thermal characteristics of YSGG crystals.
    Fields of applications:
    . Scientific investigations
    . Medical applications, lithotripsy
    . Medical applications, scientific investigations

    PROPERTIES:

    Crystal

    Er3+:YSGG

    Cr3+,Er3+:YSGG

    Crystal structure

    cubic

    cubic

    Dopant concentration

    30 – 50 at.%

    Cr: (1 ÷ 2) x 1020; Er: 4 x 1021

    Spatial group

    Oh10

    Oh10

    Lattice constant, Å

    12.42

    12.42

    Density, g/cm3

    5.2

    5.2

    Orientation

    <001>, <111>

    <001>, <111>

    Mohs hardness

    >7

    > 7

    Thermal expansion coefficient

    8.1 x 10-6x°K-1

    8.1 x 10-6 x°K-1

    Thermal conductivity, W x cm-1 x °K-1

    0.079

    0.06

    Refractive index, at 1.064 µm

    1.926

    Lifetime, µs

    -

    1400

    Emission cross-section, cm2

    5.2 x 10-21

    Relative (to YAG) efficiency of transformation of energy of the flash lamp

    -

    1.5

    Termooptical factor (dn/dT)

    7 x 10-6 x°K-1

    -

    Generated wavelength, µm

    2.797; 2.823

    -

    Lasing wavelength, µm

    -

    2.791

    Refractive index

    -

    1.9263

    Termooptical factor (dn/dT)

    -

    12.3 x 10-6 x °K-1

    Ultimate lasing regimes

    -

    overall efficiency 2.1%

    Free running mode

    -

    slope efficiency 3.0%

    Ultimate lasing regimes

    -

    overall efficiency 0.16%

    Electro-optical Q-switch

    -

    slope efficiency 0.38%

    Sizes, (dia x length), mm

    -

    from 3 x 30 to12.7 x 127.0

    Fields of applications

    -

    material processing, medical applications, scientific investigations

    Technical Parameters:

    Rod Diameters up to 15 mm
     Diameter Tolerance: +0.0000 / -0.0020 in
     Length  Tolerance +0.040 / -0.000 in
    Tilt / Wedge Angle ±5 min
    Chamfer 0.005 ±0.003 in
     Chamfer Angle 45 deg ±5 deg
     Barrel Finish  55 micro-inch ±5 micro-inch
    Parallelism 30 arc seconds
     End Figure λ / 10 wave at 633 nm
    Perpendicularity 5 arc minutes
    Surface Quality 10 – 5 scratch-dig
    Wavefront Distortion 1/2 wave per inch of length