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PRODUCT:  Er glass

 

Introduction:
Erbium and ytterbium co-doped phosphate glass has a broad application because of the excellent properties。Mostly, 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。
We can also produce erbium laser glass with various ions doping according to your requirement, we have three kinds of Erbium-doped glasses for different use, WM4, Cr14, EAT14 and CrE5。

Applications:
WM4: Erbium phosphate glass for ion-exchange purpose;Cr14: Erbium phosphate glass for xenon lamp pumping laser device and laser range-finder;EAT14: Yb3+, 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 thisEAT14 glass;
CrE5: CrE5 is for large energy output application. The glass rod of CrE5 can work safely at 1Hz repetition after surface strengthing treatment at over 10J output level;

 

Properties of Erbium Laser Galss 


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

Thermal properties

 

 

 

 

Transformation temp (℃)

455

476

530

556

Softening temp (℃)

493

519

573

605

Thermal conductivity (25℃)(W/m.K)

0.7

0.8

0.7

0.7

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

127

87

96

95

Other properties

 

 

 

 

Density (g/cm3)

3.10

2.95

2.83

3.06

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