KTP晶体 |
优势 |
应用 |
- 大的非线性光学系数
- 全角带宽和小契角
- 宽温和光谱
- 高光电系数和低介质常数
- 光波调制器的优势
- 不吸湿性，良好的化学和机械性能
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- 倍频ND掺杂的激光器输出绿光/红光
- 混频ND掺杂和半导体激光器输出蓝光
- 用作0.6mm-4.5mm可调输出的参数来源
- 光电调制器，光闸，定向耦合器
- 合成非线性晶体的光波导向器和光电器件
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浩蓝供应 |
- 应用DPSS的标准尺寸的KTP晶体
- 一个质量控制
- 1至两周的交货期
- 无以伦比的价格和特别的OEM折扣
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- 免费的技术支持
- 增透镀膜，装配，重抛光
- 支持工业和民用的批量生产
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| 基础特性 |
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| 1.结构和物理特性 |
晶体结构 |
Orthorhombic,
point group mm2 |
晶体参数 |
a =
6.404Å, b = 10.616Å,
c = 12.814Å Z = 8 |
熔点 |
1172 oC Incongruent |
居里点 |
936 oC |
莫氏硬度 |
» 5.0 |
密度 |
3.01g/cm3 |
线性吸收系数 |
a <0.001 cm-1 @ l =1064 nm or 532 nm |
吸湿敏感性 |
no |
相对介质常数 |
eeff=13 |
比热 |
0.1643
cal/g.oC |
电阻率 |
3.5x10-8 s/cm (c-axis, 22oC, 1KHz) |
导热系数 |
13W/m/K |
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| 2.线性光学性质 |
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| 透过区域: 350-4500nm |
折射系数：
波长
nx,ny,nz
1064 nm 1.7377 1.7453 1.8297
532 nm 1.7780 1.7886 1.8887
Therm-Optic系数:
dnx/dT=1.1x10-5/oC
dny/dT=1.3x10-5/oC
dnz/dT=1.6x10-5/oC
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泽尔迈尔方程式:
n2x=3.0065+0.03901/(l2-0.04251)-0.01327l2
n2y=3.0333+0.04154/(l2-0.04547)-0.01408l2
n2z=3.3134+0.05694/(l2-0.05658)-0.01682l2 |
KTP透过曲线图 |
| 3.非线性光学性质 |
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相匹配输出范围： |
492- 1700
nm |
NLO 系数:
d31=2.54pm/V, d32=4.35pm/V, d33=16.9pm/V
d24=3.64pm/V, d15=1.91pm/V at 1064 nm
deff(II)» (d24 - d15)sin2fsin2q - (d15sin2f + d24cos2f)sinq |
电光系数: |
低频率 (pm/V) |
高频率(pm/V) |
g13 |
9.5 |
8.8 |
g23 |
15.7 |
13.8 |
g33 |
36.3 |
35.0 |
g51 |
7.3 |
6.99 |
g42 |
9.3 |
8.8 |
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| ND激光器的倍频和混频应用 |
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KTP是Nd:YAG激光器和其他ND掺杂激光器最常用的倍频材料，特别是在中低功率密度。下面的表格列出ND:YAG激光器倍频的KTP主要的非线性性能。 |
PM
角 |
q=90o, f=23.5o,
where q & f are polar angles referring to Z
and X. |
有效的倍频系数 |
deff » 8.3xd36(KDP) |
可接受角度 |
20
mrad-cm |
可接受温度 |
25oC-cm |
可接受光谱 |
5.6 Å-cm. |
契角 |
4.5mrad
(0.26o) |
光学损伤值 |
>
450MW/cm2, (@ 1.06mm, 10ns, 10Hz) |
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迄今，使用KTP的腔内和腔外ND:激光器倍频的绿激光源成为许多研究，医疗，工业和民用应用的首选。用腔外KTP倍频的，超过80%的功率转换和700mj的绿激光器形成一个900mJ的Q开关的Nd:YAG 激光器。 |
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◆适用于二极管泵俌ND激光器，KTP是基本的非线性光学晶体，用于建造小型的可见固体激光系统。最近腔内倍频的Nd:YVO4 and Nd:YAG的小型绿激光器用于显示器，建筑，光盘，激光打印机的需求不断的增加。超过200mw的绿色TEM00 模输出可从二极管泵俌ND激光器Nd:YAG 激光器和3W TEM00得到。锁模的绿激光器是由一个5.3W锁模二极管激光泵俌ND激光器互动倍频产生的。另外，2.5mw的绿光束是从一个50mw激光二极管泵俌和一个带有腔长9mm的Nd:YVO4 微型激光器互动倍频得到的。
◆从波长1mm到3.4mm，KTP是倍频和混频激光器的一个强大的晶体。如图所示为KTP在XY平面(0.9 mm to 1.08 mm)和XZ平面(1.1 mm to 3.3 mm) 的倍频相位匹配角和有效倍频系数。虽然KTP在YZ平面可以与在1 mm to 3.45 mm的倍频相位匹配，但是由于低的倍频系数，很少的实际中应用。 |
 
Type II SHG in XY Plane Type II SHG in XZ Plane |
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◆ As an efficient OPO crystal pumped by the fundamental and second harmonics
of a Nd:YAG or Nd:YLF laser, KTP plays an important role in parametric
sources for tunable output from visible (0.6mm) to mid-IR (4.5mm). The phase-matching
angles and effective NLO coefficient for OPO/OPA pumped at 532 nm and
1064 nm in XZ plane are showed as following figures. NCPM KTP OPO pumped
by 1064nm, the signal output is around eye safe wavelength, find applications
in eye-safe devices. The OPO/OPA in XY and YZ is seldom employed because
of their low effective nonlinear coefficients and other limitation.
For more information about the design of KTP-OPO, please contact AZURE.
◆KTP's
OPO results in stable, continuous outputs
of femtosecond pulse of 108 Hz repetition rate and miliwatt average
power levels in both signal and idler outputs. KTP's
OPO pumped by a 1064nm Nd:laser has generated
above 66% conversion efficiency for degenerate conversion from 1064
to 2120 nm.
◆The
recently developed new application is the non-critical phase-matched
(NCPM) KTP OPO/OPA pumped by the tunable lasers such as Ti:Sapphire,
Alexandrite and Cr:LiSrAlF6 (see right figure). The NCPM KTP OPO keeps
the KTP crystal fixed in X-axis and tunes the pumping wavelength. If
a tunable Ti:Sapphire laser is used as a pumping source (0.7 mm to 1 mm), the output can cover the wavelength range
from 1.04mm to 1.45 mm (signal) and from 2.15 mm to 3.2 mm (idler). Due to the favorable NLO properties
of NCPM KTP, as high as 45% conversion efficiency was obtained with
narrow output bandwidth and good beam quality. |
 
DPO Pumped at 532 nm DPO Pumped at1064 nm |
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Quasi-Phase-Matched Waveguide
Recently, type II SHG conversion
efficiency of 20%/W/cm2 was achieved by quasi-phase matched waveguide
doubler, in which the phase mismatch from one section is balanced
against a phase mismatch of the opposite sign from a second section.
Furthermore, segmented KTP waveguides have been applied to type I quasi-phase-matchable
SHG of 0.76-0.96mm for tunable
Ti:Sapphire laser and directly doubled diode laser for 0.43-0.40m output. Conversion efficiency in excess of
100%/W/cm2 has been obtained.
Now, AZURE can provide as large
as 30x30x1 mm KTP with -Z or both faces polished for waveguide applications.
Other size is also available upon request.
Oven for heating KTP crystals:
Increasing the temperature of KTP
crystal can enhance the damage threshold of KTP crystal. Therefore,
for high power or high power density SHG of Nd lasers, heating KTP to
a certain temperature (e.g., 80oC) is recommended. AZURE provides precision
oven with temperature controller for heating KTP. A full assembly including
KTP crystal, oven and temperature controller is also available. Please
refer to page xx for more information about oven & temperature controler. |
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| 浩蓝保证的KTP指标: |
透过波长畸变: |
less
than l/4 @ 633nm |
尺寸公差: |
(W±
0.1mm)x(H ± 0.1mm)x(L+0.2mm/- 0.1) |
有效孔径: |
>
90% central area |
面型: |
l/8 @ 633nm |
表面品质: |
10/5 Scratch/Dig |
平行度: |
better
than 20 arc sec. |
垂直度: |
15
arc min. |
角精度: |
Deltaq < 0.5°,
Deltaf < 0.5° |
增透膜: |
dual
wave band AR coating at 1064/532 nm for both faces |
剩余反射率: |
<
0.2% at 1064 nm and < 0.5% at 532 nm per surface |
保质期: |
one
year under proper use |
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| 注意： |
- 浩蓝有大量的标准尺寸的KTP晶体库存。库存的晶体可以第二天发货。双波长镀增透膜用于1064nm倍频的和标准的晶体尺寸包括2X2X5 mm, 3x3x5mm and 5x5x5mm等等。
- 我们可以向长期技术和生意合作以及发展KTP新应用的客户提供免费的晶体样品。有潜力的终端用户也可以申请免费的样品。
- 在其他波段镀增透膜和高反射膜可以来函洽谈
- KTP晶体的技术信息和具体设计有我们研发中心的工程师和科技员提供的。
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