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Er: Glass

Erbium laser glassErbium and Ytterbium co-doped phosphate glass has a broad application because of the excellent properties. Mostly, it is the best glass material for 1.54um laser due to its eye-safe wavelength of 1540nm and high transmission through atmosphere. It’s also suitable for medical applications where the need for eye protection may be difficult to manage or diminish or hinder essential visual observation. Recently it is used in optical fiber communication instead of EDFA for its more super plus. There is a great progress in this field.

 

Bluebean Optical can provide erbium laser glass with various ion doping according to your requirement. We have four kinds of standard product: WM4EAT14, CrE5 and Cr14.


WM4 glass has better heat conductivity and is suitable for high power diode pumping laser system and light wave guide application.

EAT14 glass: Yb3+ and Er3+ co-doped phosphate glass, which is applicable in high repetition rate (1-6Hz) laser diode pumped 1535nm laser. High Yb3+ doping can be realized to this EAT14 glass.

CrE5 glass has high thermal shock resistance and excellent laser properties. It can be used for high average power pumping laser operating at 1540nm, especially for eye safe laser surgery.

Cr14 glass: Yb3+, Cr:3+ and Er3+  co-doped phosphate glass, which is ideal for xenon lamp pumping laser device and laser range-finder.


 PROPERTIES

 WM4

 EAT14

 CrE5

 Cr14

 LASER PROPERTIES

 

 

 

 

 Cross section for stimulated emission (10-20 cm2 )

 0.75

 0.8

 0.8

 0.8

 Fluorescent lifetime (ms)

 7.7-8.2

 7.7-8.0

 7.7-8.2

 7.7-8.0

 Center lasing wavelength (nm)

 1535

 1535

 1535

 1535

 OPTICAL PROPERTIES

 

 

 

 

 n (1535nm)

 1.528

 1.524

 1.533

 1.530

 nd

 1.536

 1.532

 1.541

 1.539

 Abbe value

 66

 66

 63.6

 64

 dn/dT (10-6/ºC) (20~100ºC)

 -3.0

 -1.72

 -6.8

 -5.2

 Coeff. of linear thermal expansion (10-7/ºC)(20~100ºC)

 82

 87

 80.5

 103

 Thermal coeff. of optical path length (10-7/ºC)(20~100ºC)

 14

 29

 

 3.6

 THERMAL PROPERTIES

 

 

 

 

 Transformation temp. (ºC)

 530

 556

 476

 455

 Softening temp. (ºC)

 573

 605

 519

 493

 Thermal conductivity (25ºC) (W/m. K)

 0.7

 0.7

 0.8

 0.7

 Coeff. of linear thermal expansion (10-7/ºC) (100~300ºC)

 96

 95

 87

 127

 OTHER PROPERTIES

 

 

 

 

 Density (g/cm3)

 2.83

 3.06

 2.95

 3.10

 Chemical durability(weigh loss rate at 100ºC distilled water)  (μg/hr.cm2)

 82

 52

 

 103


Standard Doping:

CR14:

  0.13%:Er:Yb:Cr:Glass-  Er3+: 1.3x10^19/cm3, Yb3+: 2x10^21/cm3, Cr4+: 1.2x10^21/cm3

EAT14:

  0.13%:Er:Yb:Glass- Er3+: 1.3x10^19/cm3, Yb3+: 2x10^21/cm3

  0.26%:Er:Yb:Glass- Er3+: 2.6x10^19/cm3, Yb3+: 2x10^21/cm3

  0.5%:Er:Yb:Glass-  Er3+: 5x10^19/cm3, Yb3+: 2x10^21/cm3

  1%:Er:Yb:Glass-     Er3+: 10x10^19/cm3, Yb3+: 2x10^21/cm3