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Erbium Glass

Erbium Glass 2021-10-13T21:41:17+00:00

Advantages:

  • High laser efficiency
  • Low laser threshold
  • Safe for human eye
  • High light conversion

Erbium and ytterbium co-doped phosphate glass has a broad application because of the excellent properties. It is the best glass material for 1535nm laser due to its
eye-safe wavelength of 1535 nm 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.

Properties:

Cr14 CrE5 WM4 EAT14
Lase properties
Cross section for stimulated
emission(10-20cm2)
0.8 0.8 0.75 0.8
Fluorescent lifetime(ms) 7.7-8.0 7.7-8.2 7.7-8.2 7.7-8.0
Center lasing wavelength (nm) 1535 1535 1535 1535
Optical properties
n (1535nm) 1.530 1.533 1.528 1.524
nd 1.539 1.541 1.536 1.532
Abbe value 64 63.6 66 66
dn/dT(10-6/℃) (20~100℃) -5.2 -6.8 -3.0 -1.72
Coeff of linear thermal expansion (10-7/℃)
(20~100℃)
103 80.5 82 87
Thermal coeff of optical path length(10-7/℃)
(20~100℃)
3.6 —- 14 29