E-mail
Jiaxing AOSITE Photonics Technology Co.,Ltd.
nd yvo4
nd yvo4
nd yvo4 laser crystals

Nd: YVO4 Laser Crystals

Nd:YVO4 crystals is one of the most promising commercially available diode pumped solid state laser materials, especially, for low to middle power density. This is mainly for its higher absorption and emission features than Nd:YAG crystal. Pumped by laser diodes, Nd:YVO4 crystal has been incorporated with high NLO coefficient crystals (LBO, BBO or KTP) to frequency-shift the output from the near infrared to green, blue, or even UV. This incorporation to construct all solid state lasers is an ideal laser tool that can cover the most widespread applications of lasers, including machining, material processing, spectroscopy, wafer inspection, light displays, medical diagnostics, laser printing, and data storage, etc. It has been shown that Nd:YVO4 based diode pumped solid state lasers are rapidly occupying the markets traditionally dominated by water-cooled ion lasers and lamp-pumped lasers, especially when compact design and single-longitudinal-mode outputs are required.


Advantages of Nd YVO4 Laser Crystals


  • Low lasing threshold and high slope efficiency

  • Low dependency on pumping wavelength and a strong tendency to single-mode output.

  • Large stimulated emission cross-section at the lasing wavelength of 1064nm.

  • High absorption over a wide pumping wavelength bandwidth

  • Uniaxial crystals with large birefringence emit a linearly-polarized laser.


Applications of Nd YVO4 Laser Crystals


  • Diode-pumped Solid State Lasers

  • Laser industry machining

  • Laser ranging

  • Medical examination


Specifications of Nd YVO4 Laser Crystals


Doping

0.07%~3%

Doping concentration tolerance

±0.05%(atm%<1%),±0.1%(atm%≥1%)

Orientation

A-cut/C-cut +/-0.5deg.

Dimension Tolerance

±0.1mm

Flatness

λ/10 @ 632.8nm

Wavefront distortion

λ/6@ 632.8nm

Surface Quality

10/5 per MIL-O-13830B

Parallelism

10″

Perpendicularity

10′

Bevel/Chamfer

<0.1mm@45deg.

Chips

<0.1mm

Clear Aperture

>95%

Coating

AR/HR/PR (IAD, EB, IBS) coating upon customer’s request

Damage Threshold

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

Quality Warranty Period

One year under proper use


Laser Properties of Nd YVO4 Laser Crystals


The major laser properties of Nd: YVO4 vs Nd: YAG are listed in the Table below, including stimulated emission cross-sections (σ), Absorption Coefficient (α) Fluorescent lifetime (τ), Absorption Length (La), threshold Power (Pth), and Pump Quantum Efficiency.

Laser crystal

Doping
(atm%)

σ
(x10^-19cm2)

α
(cm-1)

τ
(µs)

Lα (mm)

Pth
(mW)

Effi.
(%)

Nd: YVO4
(a-cut)

1.0
2.0

25
25

23
46

90
50

0.32
0.14

30
78

52
48.6

Nd: YVO4
(c-cut)

1.1

7

9.2

90


231

45.5

Nd:YAG

0.85

6

7.1

230

1.41

115

38.6


Physical Properties of Nd YVO4 Laser Crystals


Atomic Density:

1.26x10^20 atoms/cm3 (Nd 1.0%)

Crystal Structure:

Zircon Tetragonal, space group D4h-I4/amd
a=b=7.1193A,c=6.2892A

Density;

4.22g/cm3

Mohs Hardness:

4-5(Glass-like)

Thermal Expansion Coefficient(300K):

αa=4.43x10^-6/K
αc=11.37x10^-6/K

Thermal Conductivity Coefficient(300K):

//C:0.0523W/cm/K
⊥C:0.0510W/cm/K


Optical Properties of Nd YVO4 Laser Crystals


Lasing wavelength:

1064nm,1342nm,914nm

Thermal optical coefficient (300K):

dno/dT=8.5x10^-6/K
dne/dT=2.9x10^-6/K

Stimulated emission cross-section:

25×10^-19cm2 @ 1064nm

Fluorescent lifetime:

90μs(1% Nd doping)

Absorption coefficient:

31.4cm-1 @810nm

Intrinsic loss:

0.02cm-1 @1064nm

Gain bandwidth:

0.96nm@1064nm

Polarized laser emission:

π polarization; parallel to optic axis(c-axis)

Diode-pumped optical to optical efficiency:

≥50%

Sellemeier equations (λ in um)

n02=3.77834+0.069736/(λ2-0.04724)-0.010813λ2

ne2=4.59905+0.110534/(λ2-0.04813)-0.012676λ2


Contact Us
Welcome your presence, you can send us an email, we will get in touch with you within 24 hours.
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