CLBO
CLBO(硼酸銫鋰，CsLiB6O10)是一種新型的非線性晶體。它的透明光譜范圍寬（175~2800nm），非線性系數(shù)高，是KDP的2.2倍，離散角小。激光破壞閥值高，達(dá)26GW/cm2，倍頻轉(zhuǎn)換效率達(dá)60%（SHG）。
可以在室溫工作，很適合Nd:YAG激光器產(chǎn)生4w（266nm）和5w（213nm）倍頻光輸出。可用于紫外參量振蕩（OPG）和參量放大（OPA）。
特點(diǎn)
- 小離散角；
- 低吸收系數(shù)；
- 高頻轉(zhuǎn)換效率；
- 容易長大的單晶；
- 高激光損傷閾值；
- 高效非線性光學(xué)系數(shù)；
- 其紫外線吸收邊緣達(dá)到180 nm；
- 較大的角度，光譜和溫度帶寬值；
物理和化學(xué)特性
| 屬性 | 數(shù)值 |
| 化學(xué)式 | CsLiB6O10 |
| 晶體結(jié)構(gòu) | 四方負(fù)單軸晶體，42 m |
| 晶格常數(shù) | a=10.494?,c = 8.939?,Z=4 |
| 質(zhì)量密度 | 2.461 g/cm3 |
| 莫氏硬度 | 5.5 |
| 熔點(diǎn) | 1118 K |
| 分子質(zhì)量 | 364.706 |
| 導(dǎo)熱系數(shù) | 1.25 W/m K |
非線性光學(xué)性質(zhì)
| 屬性 | 數(shù)值 |
| NLO系數(shù) | deff(I)=d36sinθmsin(2φ) |
| ?deff(II)=d36sin(2θm)cos(2φ) | |
| 熱光系數(shù) | dno/dT=-1.9*10-6/℃ |
| ?dne/dT=-0.5*10-6/℃ | |
| 損傷閾值 | 26 GW/cm2 |
| 波長（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 | |
| 光譜接受度（nm·cm） | 0.13 |
| 0.16 | |
| 溫度接受度（℃·cm） | 8.3 |
| 4.6 |
線性光學(xué)性質(zhì)
| 屬性 | Value |
| 透明范圍 | 180-2750 nm |
| 吸收系數(shù) | 0.0013 cm?1 |
| 折光指數(shù) | |
| 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 | |
折光指數(shù)的實(shí)驗(yàn)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 |
相位匹配溫度，內(nèi)部角度和溫度帶寬的實(shí)驗(yàn)值
| 相互作用波長[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 |
光譜
 |  |
二次諧波轉(zhuǎn)換效率與輸入基本脈沖能量的函數(shù)的計(jì)算結(jié)果 | CLBO透射光譜 |
 |  |
折射率色散 | I和II型的相位匹配角隨基波波長的變化 |
參考文獻(xiàn)
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