Cryslaser is one of the most professional and largest laser crystal manufacturers in China, has more than 50 years experience in crystal growth. Cryslaser was founded in 2007, located in Chengdu China, has a facility covering more than 6000 square meters in the High-Tech Park. With more than 150 staff who have been dedicating to electro-optic industry for years, Cryslaser grows large diameter YAG series crystals using the Czochralski technique, including Nd:YAG, Nd:Ce:YAG, Cr4+:YAG, Yb:YAG, Er:YAG and undoped YAG. We are now serving customer widely spread in American, Korea, Canada, Israel and Germany.
Nd:YAG
Cr4+:YAG
Nd:YVO4
Nd:YLF
CTH:YAG
Yb:YAG
Er:YAG
Nd:Ce:YAG
KBBF
BBO
ZnGeP2
LiNbO3
KTP
LBO
KDP, DKDP
BIBO
Nd:YAG+Cr4+:YAG
0.1-3%/0.6-7.0
2×2-20×20
0.5-200
YAG+Nd:YAG
0.1-3% 2×2-20×20
0.5-200
YAG+Nd:YAG+YAG
0.1-3%
2×2-20×20
0.5-200
YAG+Nd:YAG+Cr4+:YAG
0.1-3%/0.6-7.0 2×2-20×20
0.5-200
YVO4+Nd:YVO4
0.1-3%
2×2-20×20
0.5-200
YVO4+Nd:YVO4+YVO4
0.1-3%
2×2-20×20
0.5-200
YVO4+Nd:YVO4+YVO4
0.1-3%
Dia2-15
0.5-200
Diffusion Bonded crystals capabilities:
Nd:YVO4 Doping
0.1-3%
Nd:YAG Doping
0.1-3%
Wavefront Distortion
< λ /8 at 633 nm
Orientation
±0.5deg
Scratch/Dig
10/5@MIL-O-13830A
Flatness
λ /10 at 633 nm
Clear Aperture
> Central 90%
Parallelism
< 10 arc seconds
Intrinsic Loss
< 0.1% cm -1
Coating:
AR or HR coating
Nd:YAG
Cryslaser grows Nd:YAG using the Czochralski technique for use in industrial, medical and scientific applications. Cryslaser manufactures various finished laser rods with different sizes, slabs and wafers as well as supplying Nd:YAG blank or materials.
ADVANTAGES
● High gain
● Low threshold
● High efficiency
● Low loss at 1.06um
● Good thermal conductivity and thermal shock characteristics
● Mechanical strength
● High optical quality
● Material characteristics allow for various modes of operation (CW, pulsed, Q-switched, mode locked and cavity dumped.)
Laser Rods
● Flat/flat
●Parallel/ anti-parallel wedged
●Brewster angle
●Concave/convex radii
●Cylinder grooved
KBBF
Crystal KBBF is capable of producing DUV and even vacuum-UV coherent light by direct second harmonic generation, but a major problem is its plate-like growth nature that makes it very difficult to grow samples thicker than4 mmalong the c-axis, and KBBF crystal is cleaves easily, so it is impossible to cut the crystal along the phase-matching angle. With a directly incident pump, the external incident angle will increase to 90° for a second harmonic wavelength of 235 nm. To solve the problem…
ADVANTAGES
4th harmonic generation of Nd:YAG laser at 266nm
(1) Advantages of KBBF over BBO and CLBO
●Much higher damage threshold
●Much smaller two-photon absorption
●No photorefractive effect
●No moisture
(2)Disadvantages of KBBF over BBO and CLBO
● Deff (KBBF) = 1.53(KDP)
● Deff (BBO) = 2.72(KDP)
● Deff (CLBO) = 1.97KDP) at 266nm
Targets the KBBF can realize:
● Watt-level 193nm output power with 4th HG of Ti:sapphire Laser
● 100-500mw QCW 177.3nm output power with 6th HG of Nd:YAG Laser
● Wide tunable 2.0mw coherent light output from 220nm-175.0nm with 4th HG of tunable Ti:sapphire Laser
● average 7.8 watt-level 266nm output power
● stable mw-level 165-167nm output power
Optical Properties
Deff :
KBBF crystal belongs to the space group R32, so from the point group symmetry of D3 and the IEEE/ANSI standard definition of the dij coefficient, it has only two nonzero dij coefficients, namely, d11 and d14. The matrix form of the coefficients can be written as follows:
where d14 is very small according to both theoretical calculation and experiments. On the other hand, the effective deff coefficients of KBBF are:
deff=d11cosqcos3f (type I)
deff=d11cos2qsin3f (type = 2 * ROMAN II)
By comparing the fringe envelope of the d11 coefficient with the d36 coefficient in KDP, the d11 of KBBF is deduced to be (0.47+0.01) pm/V (d36(KDP)= 0.39 pm/V).
Transparency range :
The cutoff wavelength on the UV side is located at 150 nm, and on the IR side around3.5mm. There is virtually no absorption in this region.
Sellmeier coefficients :
Sellmeier equations as follows: (l is in units of mm)
no2=2.1738+0.00764λ2-0.01641-0.01174λ2
ne2=1.9319+0.00623λ2-0.00400-0.00356λ2
Damage threshold :
It has been measured and compared with that of BBO under the same laser pump conditions (1064 nm, 1 Hz, 10.5 ns), The value is 35.51 J/cm2 (3.38 GW/ cm2) for the former, which is more than two times larger than the 13.47 J/cm2(1.28 GW/ cm2) of the latter; With a 200 fs pulse width and 1 kHz repetition rate at 390 nm, the damage threshold of KBBF was found to be as high as 60 GW/ cm2.
BBO
BBO (Beta-Barium Borate or β-BaB2O4) is an excellent nonlinear crystal for frequency-doubling of Visible and Near IR laser light, OPO/OPG/OPA pumped by ultrafast pulses of wavelengths in the Near IR to UV, and sum-frequency mixing (SFM) into the Visible to the deep UV. BBO is one of the few practical crystals for use below 500 nm in SHG and SFM.
ADVANTAGES
● Broad phase-matchable range from 409.6 nm to 3500nm
● Wide transmission region from 190 nm to 3500nm
● Large effective SHG coefficient
● High damage threshold
● High optical homogeneity with δn≈10-6/cm
● Wide temperature-bandwidth of about 55℃
Standard BBO
Dimension(mm)
θ(Deg)
φ(Deg)
Coating
Application
4*4*7
22.8
0
AR/AR@1064&532nm
SHG@1064, TypeⅠ
4*4*7
47.6
0
AR/AR@532&266nm
FHG@1064,TypeⅠ
4*4*10
22.8
0
AR/AR@1064&532nm
SHG@1064, TypeⅠ
4*4*10
47.6
0
AR/AR@532&266nm
FHG@1064, TypeⅠ
5*5*1
29.2
0
AR/AR@800&400nm
SHG@800, TypeⅠ
5*5*0.3-0.5
29.2
0
AR/AR@800&400nm
SHG@800, TypeⅠ
Specifications
Material
BBO
Match Type
type I or type II
Dimension
W×H:1×1-15×15mm, L: 0.05-20mm
Dimension Tolerance
W(±0.1) x (H(±0.1) x L(+0.2/-0.1)mm
Angle Tolerance
Δθ< 0.2°, Δφ< 0.2°
Flatness
λ/8 @ 633nm
Wavefront Distortion
< λ/8 @ 633nm
Scratch/Dig
20/10@MIL-0-13830A
Parallelism
< 30 arc seconds
Perpendicularity
< 10 arc minutes
Clear Aperture
>90%
Chamfer
0.15mmx 45°
AR Coating
AR@ 1064nm R < 0.2% & 532nm R < 0.5%
Damage Threshold
500 MW/cm2@1064nm 10ns 10Hz
Properties
Crystal Structure
trigonal, space group R3c
Cell Parameters
a=b=12.532Å, c =12.717Å, Z=6
Melting point
1095°C
Mohs hardness
4.5
Density
3.85 g/cm3
Hygroscopic Susceptibility
low
Thermal Conductivity
⊥c: 1.2 W/m/K, ║c: 1.6 W/m/K
Thermal Expansion Coefficients
α11= 4 x 10-6 /K, α33= 36 x 10-6 /K
Resistivity (ohm • cm)
> 1011 ohm-cm
Relative Dielectric Constant
εs11/ε0= 6.7
εs33/ε0= 8.1
Tan δ<0.001
Transparency Range
190-3500 nm
Phase Matching SHG Range
205nm-1750nm
Electro-optic coefficients
r22=2.7pm/V
therm-optic Coefficients(/℃)
dno/dT=-16.6x10-6
dne/dT=-9.3x10-6
AR coating
AR/AR @1064nm R≤0.2%,or other point
AR/AR @1064nm R≤0.2%&808nm R≤0.5%,or other point
PR coating
PR @1064nm, or other point
HR coating
HR @1064nm R>99.8%
HR @1064nm R>99.8% HT@808nm T≥95%
HR @1064nm R>99.8% AR@808nm R≤2%