铌酸锂晶体在光电技术中的应用

grating-opt · 发表于 2004-12-18 23:29:00

以下是引用hujingjane在2004-12-3 18:35:22的发言：
我想问一下，铌酸锂晶体单位面积能够承受的光功率有多大？

现在想用铌酸锂晶体的调制器，但是激光器的输出功率有2瓦，不知道行不行，

请问你是连续的还是脉冲的？

如果是连续的激光还可以。

paulchenwy · 发表于 2005-4-1 19:58:00

LN的另外一个应用是基于相位调制的电场测量，利用M-Z结构将相位转换为幅度，可以用作电磁兼容领域的计量，我正在从事这方面的研究

lczhy00001 · 发表于 2005-6-7 22:36:00

现在光隔离器用楔角片市场很大。

lczhy00001 · 发表于 2005-6-9 00:31:00

有对LN感兴趣的可以探讨， lczoptics@yahoo.com.cn

lczhy00001 · 发表于 2005-12-25 00:20:00

lczhy00001 · 发表于 2005-12-25 00:21:00

lczhy00001 · 发表于 2005-12-25 00:23:00

lczhy00001 · 发表于 2005-12-25 00:31:00

LiNbO3

On its excellent optical and electrical properties, LiNbO₃ is one of the most important materials used for the field of optics and electronics, such as laser components, wafers for surface acoustic wave devices, wafers for integrated optics applications and doped LiNbO₃ crystals for nonlinear optics (MgOiNbO₃, ZnO: LiNbO₃), photo-refractive effects devices (FeiNbO₃), etc.

OPO, Frequency and Quasi-Phase-Matched (QPM) Doublers

LiNbO₃ is commonly applied as not only frequency doubler (wavelength 1 mm) but optical parameter oscillator (OPO) pumped at 1.064 mm, as well quasi-phase-matched (QPM) doubler. HROPTICS supplies laser-grade LiNbO₃ devices of (3-20) x (3-20) mm² aperture and up to 60 mm length for frequency doubler and optical parameter oscillator, with high quality, large quantity and low price. Its properties show as follows:

Basic Properties

Crystal Structure	Trigonal, point group 3m
Lattice Parameters	a=5.148Å, c=13.863Å
Density	4.64 g/cm³
Melting Point	1250 °C
Curie Point	1160 °C
Mohs Hardness	5
Dielectric Constant	e₁₁/e₀ = 85; e₃₃/e₀ = 29.5
Absorption Coefficient	~ 0.1%/cm @1064 nm
Thermal Conductivity	38 W/m/°C at 25°C
Thermal Expansion Coefficient	a₁=a₂ =2x10^-6/°C, a₃=2.2x10^-6/ °C at 25°C
Piezoelectric Strain Constant	d₂₂ = 2.04 x 10^-11 C/N, d₃₃ = 19.22 x 10^-11 C/N
Elastic Stiffness Constant	C^E₁₁ = 2.04 x 10¹¹ N/m², C^E₃₃ = 2.46 x 10¹¹ N/m²

Optical and NLO Properties

Transparency Region	3700 ~ 5000 nm
Sellmeier Equations (l in mm)	n_o² = 4.9048+0.11768/(l²-0.0475)-0.027169l² n_e² = 4.5820+0.099169/(l²-0.04443)-0.02195l²
Optical Homogeneity	Dn ~ 5x10⁵/cm²
Nonlinear Coefficients	d_eff=13.6 d₃₆(KDP) for OPO at 1064 nm d_eff =14.6 d₃₆(KDP) for SHG at 1300 nm d_eff =45.0 d₃₆(KDP) for QPM
Refractive Indexes	n_o n_e 2.220 2.146 @ 1300 nm 2.322 2.156 @ 1064 nm 2.286 2.203 @ 632.8 nm
Electro-optic Coefficients (pm/V)	Low frequency High frequency g₃₃ 32 31 g₃₁ 10 8.6 g₂₂ 6.8 3.4
Damage Threshold	250 KW/cm² at 1064 nm (10 ns)

X-CUT

76.2 diameter*0.5---1.0mm HR-LNX0305-10

Z-CUT

76.2 diameter*0.5---1.0mm HR-LNZ0305-10

Y-CUT

76.2 diameter*0.5---1.0mm HR-LNY0305-10

127.86° Y-cut,

76.2 diameter*0.50mm HR-LNY1040305

64° Y-cut,

76.2 diameter*0.5mm HR-LNY640305

Applications for Q-switch Elements

LiNbO₃ is extensively used as electro-optic modulator and Q-switch for Nd:YAG, Nd:YLF and Ti:Sapphire lasers as well as modulator for fiber optics, etc. The transverse modulation is mostly employed for LiNbO₃. If a LiNbO₃ crystal is used as Q-switch crystal, the light propagates in Z-axis and electric field applies to X-axis, the refractive retardation will be G = pLn_o³¡₂₂V/ld. MgOiNbO₃ and ZnO: LiNbO₃ crystals have similar electro-optic properties to LiNbO₃ but with higher damage threshold. The specifications of LiNbO₃ Q-Switch Elements listed as the following table:

LiNbO₃ Q-Switch Elements

Standard Dimension	9x9x25 or 10x10x20mm³ (other dimension is also available upon request)
Dimension Tolerance	X Y-axis: ± 0.1mm ; Z-axis: ± 0.3mm
Wavefront Distortion	l/4 @633nm
Orientation Accuracy	X Y-axis: 10'; Z-axis: 5'
Flatness	l/8 @632.8nm
Parallelism	10"
Scratch/Dig Code	10/5 per MIL-O-13830A
Chamfer	0.5 mm at 45º ± 5º
AR-Coating	R 0.2% @ 1064 nm
Electrodes	Gold electrode on X-faces
Extinction Ratio	400:1 @ 633 nm for f 6mm beam)

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Surface Acoustic Wave (SAW) Devices

LiNbO₃ crystal is widely applied as an excellent acousto-optic material for surface acoustic wave (SAW) devices (such as filters, oscillators and resonators) and ultrasonic transducer due to its high electro-mechanical coupling factor, low acoustic transmission loss, stable physical and chemical properties.

HROPTICS can supply large quantities of LiNbO3 boules, as-cut or finished f3" wafers available up to 6,000~ 9,000 pieces per month with good quality and very low price. The basic specifications and typical properties for LiNbO3 SAW wafer are listed as following:

Bsic Specifications of LiNbO₃ SAW Wafer

Standard Dimension	f3.0² (±0.01²) x 0.51 mm (±0.05 mm)
Typical Orientation	1) 127.86° Y-cut, 2) 64° Y-cut, 3) Y-cut, 4) Z-cut
Surfaces Finish	One surface mirror polished to Ra less than 10Å, reverse surface fine ground
Bow	20 mm

Typical properties of LiNbO3 SAW Wafer

Orientation	127.86° Y-cut	Y-cut
SAW Velocity	3970 m/s	3485 m/s
Electromechanical Coupling Factor	K_s²=5.5%	K_s²=4.3%
Temperature Coeff. of Delay (TCD)	78 x 10^-6/°C	95 x 10^-6/°C
Temperature Coeff. of Velocity (TCV)	-60 x 10^-6/°C	-80 x 10^-6/°C

LiNbO₃ Wedges/Birefringent Substrates for use in fiber optics

Specifications:

Aperture	1.0 x 1.0 mm² to 4 x 4 mm²
Dimension tolerance	+/-0.05mm
Wedge Angle tolerance	+/-0.1^o
Optical axis orientation	+/-0.5^o
Flatness	l/4 @632.8 nm
Surface Quality	20-10
AR-coating	R0.2%

Standard Sizes	a) 1.25mmx1.25mmx0.25mm(top end) or 0.55mm(bottom end) b) 1.6mmx1.6mmx0.55mm
Cutting Angle	q=90^o, f=22.5^o
Wedge Angle	13^o or 15^o
Coating	Two apertures AR coated typically for ~1550nm
Quantities Available	50,000 to 70,000 per month

Waveguide Substrates

LiNbO3 crystal is the mostly used inorganic substrate for electro-optic waveguide applications.

Specifications of LiNbO3 Waveguide Substrates

Standard Dimension

1) 50x50x1 mm³ for X-cut, Y-cut, or Z-cut

2) f 3"x1 m m³ for Y-cut or Z-cut

3) Other dimension is available upon request.

Orientation Tolerance

10'

Surfaces Finish

One surface polished to better than l/2 (with mount) and free from surface defects when observed by a 50X microscope, the other face fine ground

. Magnesium Oxide Doped Lithium Niobate (MgOiNbO₃)

lczhy00001 · 发表于 2005-12-29 21:17:00

今天发现帖子置顶了,感谢斑竹,希望有关光学LN的朋友多多交流.

lczhy00001 · 发表于 2006-1-11 16:45:00

lczhy00001 · 发表于 2006-1-11 16:52:00

公司动态:

2006年5月再新增2台3英寸光学铌酸锂(LN) 单晶炉.其中3英寸MgN月产量10千克,FeN5千克.纯LN晶体15千克.欢迎考察选购.

lczhy00001 · 发表于 2006-1-11 16:54:00

公司动态

2006年元月15号公司网站更新后同大家见面.欢迎大家浏览.


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铌酸锂晶体在光电技术中的应用

我们的加工设备

4英寸LN\MG;LN

Basic Properties

Dielectric Constant

Optical and NLO Properties

no ne

Electro-optic Coefficients (pm/V)

Low frequency High frequency

Surface Acoustic Wave (SAW) Devices

Typical Orientation

Surfaces Finish

Bow

Orientation

LiNbO3 Wedges/Birefringent Substrates for use in fiber optics

Specifications:

Aperture

1.0 x 1.0 mm2 to 4 x 4 mm2

Dimension tolerance

+/-0.05mm

Wedge Angle tolerance

+/-0.1o

Optical axis orientation

+/-0.5o

Flatness

l/4 @632.8 nm

Surface Quality

20-10

AR-coating

R0.2%

Standard Sizes

a) 1.25mmx1.25mmx0.25mm(top end) or 0.55mm(bottom end) b) 1.6mmx1.6mmx0.55mm

Cutting Angle

q=90o, f=22.5o

Wedge Angle

13o or 15o

Coating

Two apertures AR coated typically for ~1550nm

Quantities Available

50,000 to 70,000 per month

Waveguide Substrates

发表回复

浏览过的版块

n_o n_e

LiNbO₃ Wedges/Birefringent Substrates for use in fiber optics

1.0 x 1.0 mm² to 4 x 4 mm²

+/-0.1^o

+/-0.5^o

a) 1.25mmx1.25mmx0.25mm(top end) or
0.55mm(bottom end)
b) 1.6mmx1.6mmx0.55mm

q=90^o, f=22.5^o

13^o or 15^o