Er:Yb:glass crystal Erbium and ytterbium co-doped phosphate glass

Er3+, Yb3+ co-doped phosphate glass is a well-known and commonly used active medium for lasers emitting in the “eye-safe” spectral range of 1,5-1,6 µm.

As an eye-safe wavelength laser, 1540um ,Er3+/Yb3+ co-doped phosphate glass lasers have attracted much attention for their compactness and low cost, such as laser generation and signal amplification because the wavelength of 1540nm is just at the position of the eye-safe and the fiber optic communication window. 1540nm lasers have used in ranging finder, radar, target recognition. Er3+/Yb3+ co-doped phosphate glass cooperate with passive Q-Switch crystal cospinel can get 1540nm pulse solid-state laser.



Descriptions:


Er3+, Yb3+ co-doped phosphate glass is a well-known and commonly used active medium for lasers emitting in the “eye-safe” spectral range of 1,5-1,6 µm.

As an eye-safe wavelength laser, 1540nm lasers have used in ranging finder, radar, target recognition. Er3+/Yb3+ co-doped phosphate glass cooperate with passive Q-Switch crystal cospinel can get 1540nm pulse solid-state laser.


Optical and laser properties of Er:Yb:glass

Cross section for stimulated emission (10-20cm2)

0.8

Fluorescent lifetime (ms)

7.7-8.0

Center lasing wavelength (nm)

1535

Refractive index (1535nm)

1.524

Refractive index (d 589.3nm)

1.532

Abbe value

66

dn/dT (10-6/) (20~100)

-1.72

Transformation temp. ()

556

Softening temp. ()

605

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

87

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

95

Thermal Coeff.of optical path length (10-6/K) (20~100)

2.9

Thermal conductivity (25) (W/mK)

0.7

Density (g/cm3)

3.06

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

52


HGO offers Er:Yb:glass specifications:

Dimension Tolerances

rods with diameter: +0.0/-0.05 mm , Length: ±0.1 mm

Surface Quality:

10/5 Scratch/Dig MIL-O-1380A

Parallelism:

< 10

Perpendicularity:

< 5

Clear Aperture:

> 90%

Wavefront Distortion:

λ/4 per inch @ 632.8 nm

Surface Flatness:

< λ/8 @ 632.8 nm

Chamfer:

< 0.1 mm @ 45o

Barrel Finish

50-80 micro-inch (RMS) ,

Size

Upon customer request

Coating

AR/HR oating upon customer’s request

Damage Threshold

750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz

Quality Warranty Period

One year under proper use


Advantages:

1) Wide absorption band

2) Long fluorescence lifetime

3) High optical quality

4) Safety for eye

5) High slope efficiency


Why Choose HGO?

HG OPTRONICS.,INC. supplies very high quality of Er3+/Yb3+ co-doped phosphate glass for eye safe lasers. Not only seperate kits but also bonding kits with cospinel q-switch. Also other related high laser induced damage threshold cavity lens and mirrors for the eye safe lasers is also available from stock.



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