CLBO
CLBO(硼酸铯锂,CsLiB6O10)是一种新型的非线性晶体。它的透明光谱范围宽(175~2800nm),非线性系数高,是KDP的2.2倍,离散角小。激光破坏阀值高,达26GW/cm2,倍频转换效率达60%(SHG)。
可以在室温工作,很适合Nd:YAG激光器产生4w(266nm)和5w(213nm)倍频光输出。可用于紫外参量振荡(OPG)和参量放大(OPA)。
特点
- 小离散角;
- 低吸收系数;
- 高频转换效率;
- 容易长大的单晶;
- 高激光损伤阈值;
- 高效非线性光学系数;
- 其紫外线吸收边缘达到180 nm;
- 较大的角度,光谱和温度带宽值;
物理和化学特性
属性 | 数值 |
化学式 | CsLiB6O10 |
晶体结构 | 四方负单轴晶体,42 m |
晶格常数 | a=10.494Å,c = 8.939Å,Z=4 |
质量密度 | 2.461 g/cm3 |
莫氏硬度 | 5.5 |
熔点 | 1118 K |
分子质量 | 364.706 |
导热系数 | 1.25 W/m K |
非线性光学性质
属性 | 数值 |
NLO系数 | deff(I)=d36sinθmsin(2φ) |
deff(II)=d36sin(2θm)cos(2φ) | |
热光系数 | dno/dT=-1.9*10-6/℃ |
dne/dT=-0.5*10-6/℃ | |
损伤阈值 | 26 GW/cm2 |
波长(nm) | 532 + 532 = 266 |
1064 + 266 = 213 | |
相位匹配角(°) | 61.7 |
68.4 | |
流量(pm / V) | 0.84 |
0.87 | |
角度公差(mrad·cm) | 0.49 |
0.42 | |
偏角(°) | 1.83 |
1.69 | |
光谱接受度(nm·cm) | 0.13 |
0.16 | |
温度接受度(℃·cm) | 8.3 |
4.6 |
线性光学性质
属性 | Value |
透明范围 | 180-2750 nm |
吸收系数 | 0.0013 cm−1 |
折光指数 | |
1.064微米 | ne = 1.4340, no = 1.4838 |
0.532微米 | ne = 1.4445, no = 1.4971 |
Sellmeier方程(λinμm | no2 = 2.2104+0.01018/(λ2-0.01424)-0.01258λ2 |
ne2 = 2.0588+0.00838/(λ2-0.01363)-0.00607λ2 |
折光指数的实验值
λ[µm] | no | ne |
0.42 | 1.5058 | 1.4517 |
0.45 | 1.503 | 1.4493 |
0.48 | 1.5006 | 1.4474 |
0.5 | 1.4991 | 1.4462 |
0.532 | 1.4971 | 1.4445 |
0.56 | 1.4957 | 1.4434 |
0.59 | 1.4943 | 1.4422 |
0.61 | 1.4935 | 1.4414 |
0.6328 | 1.4928 | 1.4409 |
0.67 | 1.4915 | 1.4398 |
0.7 | 1.4907 | 1.4392 |
0.72 | 1.4902 | 1.4387 |
1.064 | 1.4838 | 1.434 |
相位匹配温度,内部角度和温度带宽的实验值
相互作用波长[μm] | θpm [deg] | T [◦C] | Δθint [deg] | ΔT [◦C] |
SHG, o + o ⇒ e | ||||
0.946 ⇒ 0.473 | 90 | -15 | 5 | |
0.5235 ⇒ 0.26175 | 65.8 | ~160 | ||
0.5321 ⇒ 0.26605 | 62 | ~140 | ||
61.4 | 20 | 0.23 | 6.2 | |
1.0642 ⇒ 0.5321 | 29.5 | 20 | 0.043 | 52.7 |
1.3382 ⇒ 0.6691 | 27.7 | 20 | 68.7 | |
SFG, o + o ⇒ e | ||||
1.0642 + 0.26605 ⇒ 0.21284 | 67.3 | 20 | 3.6 | |
1.547 + 0.221 ⇒ 0.19338 | 61.7 | 150 | ||
1.9079 + 0.2128 ⇒ 0.1914 | 55 | 20 | 1.2 | |
1.0642 + 0.35473 ⇒ 0.26605 | 50.6 | 20 | 6.1 | |
1.0642 + 0.5321 ⇒ 0.35473 | 39.1 | 20 | 18 | |
SHG, e + o ⇒ e | ||||
1.0642 ⇒ 0.5321 | 42.4 | 20 | 49.4 | |
SFG, e + o ⇒ e | ||||
1.9079 + 0.2128 ⇒ 0.1914 | 57.4 | 20 | 1.1 | |
1.0642 + 0.5321 ⇒ 0.35473 | 48.9 | 20 | 17 |
光谱
二次谐波转换效率与输入基本脉冲能量的函数的计算结果 | CLBO透射光谱 |
折射率色散 | I和II型的相位匹配角随基波波长的变化 |
参考文献
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