Erbium and ytterbium co-doped phosphate glass has a broad application because of the excellent properties. Mostly, it is a excellent material for medical application 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. We can also produce erbium laser glass with varios ion doping according to your requirement. We have three kinds or Erbium-doped glasses. EP6, WM4,Cr14. 

Optical Properties EP6
Non-linear refractive index coeff.n2 
  (x10-13 e.s.u)
n (1540nm) 1.532
nd 1.544
Abbe value 65
dn/dT (10-6/0C) (20~1000C) -4.7
Coeff.of linear thermal expansion (10-
/0C) (20~1000C)
Thermal coeff.of optical path length 
  (10-6/0C) (20 ~ 1000C)



Laser Properties EP6
Cross section for stimulated 
  emission (10-20cm2)
Fluorescent lifetime (usec) 9000
Center lasing wavelength (nm) 1535



Thermal Properties EP6
Transformation temp. (0C) 442
Softening temp. (0C) 470
Coeff.of linear thermal expansion (10-
/0C) (100 ~ Tg0C)



Other Properties EP6
Desity (g/cm3) 3.15
Chemical durability (weigh loss rate at 850C distilled water) 70ug/


Erbium phosphate glass for xenon lamp or laser diode pumping laser device
Properties EP6
 nd 1.5359
 Desity (g/cm3) 3.1
 n at lasing wavelength 1.53
 V 64
 Stimulated cross section (pm2) 0.8
 Fluorescent lifetime (ms) 7.7
 Radiative lifetime (ms) 8.8
 FWHM (nm) 29
 Tg (0C) 455
 Tf (0C) 493
 a(25-800C) (10-7/K) 103
 a(25-3000C) (10-7/K) 127
 dn/dT (10-7/K) -52
 ds/dT (10-7/K) 3.6




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