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LiNbO3 and MgO:LiNbO3
鈮酸鋰（LiNbO3）晶體被廣泛用作1000nm以上波長的倍頻和1064nm泵浦光的光參量放大,也可做準(zhǔn)相位匹配. 同時(shí),鈮酸鋰晶體也被廣泛應(yīng)用于光電調(diào)節(jié)器及波導(dǎo)材料,和用作Nd:YAG,Nd:YLF和摻Ti的藍(lán)寶石激光Q開關(guān). 美揚(yáng)光電公司可為上述用途提供各種規(guī)格的高質(zhì)量,大尺寸的鈮酸鋰晶體.
Main Features:
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Large Electro-Optic (E-O) coefficients
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Large Acousto-Optic (A-O) coefficients
Typical Applications:
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Frequency doublers
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Optical parametric oscillators (OPO)
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Quasi-phase-matched (QPM) device
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Q-switches and modulator
Specifications:
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Dimensional Tolerance
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±0.1mm
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Angle Tolerance
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±0.5deg
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Wavefront Distortion
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<λ/4 @ 633nm
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Surface Flatness
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<λ/8 @ 633 nm
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Surface Quality
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20/10 Scratch and Dig
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Parallelism
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< 20 arc seconds
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Perpendicularity
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< 5 arc minuntes
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Clear Aperture
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> Central 90%
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AR-Coating
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dual waveband AR coating @1064/532 nm on both surfaces, with R < 0.2% @ 1064 nm and R < 0.5% @ 0.532 nm per surface
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Physical and Optical Properties
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Crystal Structure
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Trigonal, space group R3c
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Cell Parameters
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a = 0.515?, c = 13.863?, Z = 6?
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Melting Point
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1255±5oC
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Curie Point
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1140±5oC
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Mohs Hardness
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5
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Density
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4.64 g/cm3
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Absorption Coefficient
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~ 0.1%/cm @ 1064 nm
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Solubility:
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insoluble in H2O
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Relative Dielectric Constant
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eT11/e0: 85
eT33/e0: 29.5 |
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Thermal Expansion Coefficients( @ 25oC)
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||a, 2.0 x 10-6/K
||c, 2.2 x 10-6/K |
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Thermal Conductivity
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38 W /m /K @ 25oC
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Transparency Range
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420 - 5200 nm
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Optical Homogeneity
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~ 5 x 10-5 /cm
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Sellmeier Equations( l in mm)
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no2(l) = 4.9048+0.11768/(l2 - 0.04750) - 0.027169 l2
ne2(l) = 4.5820+0.099169/(l2- 0.04443) - 0.021950 l2 |
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NLO Coefficients
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d33 = 34.4 pm/V
d31 = d15 = 5.95 pm/V d22 = 3.07 pm/V |
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Electro-Optic Coefficients
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gT33 = 32 pm/V, gS33 = 31 pm/V
gT31 = 10 pm/V, gS31 = 8.6 pm/V gT22 = 6.8 pm/V, gS22 = 3.4 pm/V |
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Half-Wave Voltage, DC
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Electrical field ||z, light ^ z 3.03 KV
Electrical field ||x or y, light || z 4.02 KV
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Efficiency NLO Coefficients
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deff=5.7pm/V or~14.6xd36(KDP) for frequency doubling 1300 nm;
deff=5.3pm/V or~13.6xd36(KDP) for OPO pumped at 1300nm; deff=17.6pm/V or~45xd36(KDP) for quasi-phase-matched structure; |
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Damage Threshold
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200 MW/cm2
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Standard Products Series
MT- Optics,Inc. can provide LiNbO3 products used for many applications, such as E-O modulator, waveguide substrate, frequency doubling, SAW wafer application and etc.
1. E-O modulator
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Part No.
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Dimension
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Cut
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Coating
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Electrode
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LNO001
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3x3x15mm
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Z-cut
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AR/AR@1064nm
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Au on X face
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LNO002
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4x4x15mm
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Z-cut
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AR/AR@1064nm
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Au on X face
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LNO003
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6x6x25mm
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Z-cut
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AR/AR@1064nm
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Au on X face
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LNO004
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9x9x25mm
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Z-cut
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AR/AR@1064nm
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Au on X face
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2. Waveguide substrate
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Part No.
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Dimension
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End faces
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LNO101
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50x50x1mm
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One surface polished, reverse fine ground
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3. SAW Wafer
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Part No.
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Dimension
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Thickness
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End faces
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LNO201
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76.2mm
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0.5mm
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One surface polished, reverse fine ground
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Note: 127.86deg Y cut, Y-cut, Z-cut and other cut also can be provided upon request.
Magnesium Oxide Doped Lithium Niobate Crystal
Compared with LiNbO3 crystal, MgO:LiNbO3 crystal exhibits its particular advantages for NCPM
frequency doubling (SHG) of Nd:Lasers, mixing (SFG) and optical parametric oscillators
(OPOs). MgO:LiNbO3 is also a good crystal for optical parametric oscillators (OPOs) and
amplifiers (OPAs), quasi-phase-matched doublers and integrated waveguide.
MgO:LiNbO3 has similar effective nonlinear coefficients to pure LiNbO3 . Its Sellmeier equations
(for MgO dopant 7 mol%) are:
no2=4.8762+0.11554/(λ2 - 0.04674) - 0.033119λ2
ne2=4.5469+0.094779/(λ2 - 0.04439) - 0.026721λ2
Lithium Tantalate Crystal
LiTaO3 crystal is also widely used as electro-optic modulator, with NLO and E-O properties
similar to those of LiNbO3 but higher damage threshold (>500 MW/cm for ns pulsed).
Note: 127.86deg Y cut, Y-cut, Z-cut and other cut also can be provided upon request.
