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Yb: YAG Laser Crystals

Yb:YAG crystal is more suitable for diode-pumping than the traditional Nd-doped systems. It can be pumped at 0.94 μm laser output. Compared with the commonly used Nd:YAG crystal, Yb:YAG crystal has a much larger absorption bandwidth to reduce thermal management requirements for diode lasers, a longer upper-state lifetime, three to four times lower thermal loading per unit pump power. Yb:YAG crystal is expected to replace Nd:YAG crystal for high power diode-pumped lasers and other potential applications.


Applications of Yb YAG Laser Crystals


  • high power diode-pumped lasers

  • other potential applications


Advantages of Yb YAG Laser Crystals


  • Very low fractional heating, less than 11%

  • The very high slope efficiency

  • Broad absorption bands, about 8nm@940nm

  • No excited-state absorption or up-conversion

  • Conveniently pumped by reliable InGaAs diodes at 940nm(or 970nm)

  • High thermal conductivity and large mechanical strength

  • High optical quality


Specifications of Yb YAG Laser Crystals


Doping(atm%):

1.0% ~ 20%

Orientation:

<111>crystalline direction

Wavefront Distortion:

λ/10 per inch @ 632.8 nm

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%

Surface Flatness:

< λ/10 @ 632.8 nm

Chamfer:

< 0.1 mm @ 45o

Barrel Finish

50-80 micro-inch (RMS) ,

Size

Upon customer request

Coating

AR/HR/PR coating upon customer’s request

Damage Threshold

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

Quality Warranty Period

One year under proper use

Slabs, thread rod, Er: YAG, Nd: YAG, Cr: YAG, Ce: YAG, Tm: YAG, Ho: YAG, and other ion-doped YAG crystals are also available upon request.


Properties of Yb YAG Laser Crystals


Laser Transition

2 F 5/2→2 F 7/2

Laser Wavelength

1030nm

Photon Energy

1.93×10-19 J(@1030nm)

Emission Linewidth

9nm

Emission Cross Section

2.0×10-20 cm2

Fluorescence Lifetime

1.2ms

Diode Pump Band

940nm or 970nm

Pump Absorption Band Width

8nm

Index of Refraction

1.82

Thermal Optical Coefficient

9×10-6/℃

Loss Coefficient

0.003 cm-1


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Head Office: No. 66, 8 Group, Chengbei Village, Yanguan Town, Jiaxing 314411, China;

Hangzhou Branch: Room 1012, Chunhua Bussiness Center, No. 159, Hangbo Street, Shangcheng District, Hangzhou 310009, Zhejiang, China
Head Office: No. 66, 8 Group, Chengbei Village, Yanguan Town, Jiaxing 314411, China;

Hangzhou Branch: Room 1012, Chunhua Bussiness Center, No. 159, Hangbo Street, Shangcheng District, Hangzhou 310009, Zhejiang, China
sales@ostphotonics.com; info@ostphotonics.com +86-0571-86780460