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Tm:YLF

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Tm:YLF

兩微米Tm3+激光器在科學(xué)、國防和醫(yī)療領(lǐng)域有著廣泛的應(yīng)用。銩很容易被替代成許多適用于高平均功率激光系統(tǒng)的晶體主體，其吸收帶約為0.8μm，允許用商用高功率激光二極管進(jìn)行激發(fā)。摻銩氟化釔鋰晶體具有較低的非線性折射率和熱光常數(shù)，非常適合在科研、生產(chǎn)、教育等光電領(lǐng)域的應(yīng)用。該晶體是具有負(fù)折射率溫度系數(shù)的負(fù)單軸晶體，它可以抵消一些熱畸變，從而具有高光束質(zhì)量的輸出。泵浦波長(zhǎng)為792nm，波長(zhǎng)1900nm的線偏振激光器沿軸方向輸出。從c軸輸出的光是非線性偏振的。通過選擇合適的晶體尺寸和摻雜濃度，可以獲得高功率激光輸出。

  • 非線性折射率低
  • 熱光常數(shù)低
  • 極化損耗低
  • 上能級(jí)熒光壽命長(zhǎng)
  • 上轉(zhuǎn)換效應(yīng)小
  • 敏化離子無吸收損失

材料規(guī)格

濃度公差（atm％）2-4 at.%
晶格常數(shù)4~5
取向a-切口，其他方向也可用
平行性<10”
垂直性<5”
表面質(zhì)量10-5?刮痕 & 凹陷
波前畸變λ/8 @ 633nm
表面平整度λ/10 @ 633nm
通光孔徑95%
長(zhǎng)度公差±0.1 mm
面尺寸公差+0/-0,1 mm
防護(hù)倒角<0,1 mm 在45?
損傷閾值over 15J/cm2 TEM00, 10ns, 10Hz

物理和化學(xué)特性

晶體結(jié)構(gòu)四方晶系
晶格常數(shù)a=5.16?; c=10.85?
密度3.99 g/cm3
熔點(diǎn)819℃
導(dǎo)熱系數(shù)6 Wm-1K-1
熱光學(xué)系數(shù)（dn / dT）π = 4.3 x 10-6?x °K-1; σ = 2.0 x 10-6?x °K-1
熱膨脹率/（10-6·K-1 @ 25°C）10.1×10-6?(//c) K-1,? 14.3×10-6((//a) ?K-1
硬度（莫氏）5
剪切模量/ Gpa85
比熱0.79 J/gK
泊松比0.3

光學(xué)和光譜性質(zhì)

激光躍遷3F4→3H6
激光波長(zhǎng)π:1880 nm; σ:1908 nm
峰吸收截面0.55×10-20?cm2
峰值波長(zhǎng)處的吸收帶寬16?nm
吸收峰波長(zhǎng)792?nm
3F4 銩能級(jí)的壽命16 ms
量子效率2
非線性指標(biāo)n20.6 x 10-13
光學(xué)質(zhì)量< 0.3 x 10-5
折射率@ 1064 nmno=1.448, ne=1.470
激光引起的損傷閾值>10 J/cm2@1900 nm, 10 ns
鍍膜在兩邊R<0,5% @792 nm + R<0,15% @1800-1960 nm; 還可提供定制鍍膜

吸收和發(fā)射光譜

Tm-YLF激光晶體-發(fā)射譜2-南京光寶-CRYLINKTm-YLF激光晶體-發(fā)射譜1-南京光寶-CRYLINK
Tm-YLF激光晶體-吸收譜2-南京光寶-CRYLINKTm-YLF激光晶體-吸收譜1-南京光寶-CRYLINK

參考文獻(xiàn)

[1] Yue, Chen, Xin-Yu, et al. A compact high efficient Tm:YLF laser dual-end-pumped by an equidirectional-polarizing fiber coupled laser diode at room temperature[J]. Optik: Zeitschrift fur Licht- und Elektronenoptik: = Journal for Light-and Electronoptic, 2018, 158:1553-1557.
[2]? Cui Z ,? Yao B Q ,? Duan X M , et al. A graphene saturable absorber for a Tm:YLF pumped passively Q-switched Ho:LuAG laser[J]. Optik – International Journal for Light and Electron Optics, 2016, 127(5):3082-3085.
[3]? Duan X M ,? Ding Y ,? Dai T Y , et al. A linewidth-narrowed Tm:YLF laser using by two etalons[J]. Optik – International Journal for Light and Electron Optics, 2015, 126(19):2108-2109.
[4]? Wang Y P ,? Dai T Y ,? Wu J , et al. A Q-switched Ho: YAG laser with double anti-misalignment corner cubes pumped by a diode-pumped Tm: YLF laser[J]. Infrared Physics & Technology, 2018, 91:8-11.
[5]? Dai Y ,? Li Y ,? Zou X , et al. Compact passively Q-switched Tm:YLF laser with a polycrystalline Cr:ZnS saturable absorber[J]. Optics & Laser Technology, 2014, 57:202-205.
[6]? Zhang B ,? Li L ,? He C , et al. Compact self-Q-switched Tm:YLF laser at 1.91 μm[J]. Optics & Laser Technology, 2018, 100.
[7]? Antipov O L ,? Zakharov N G ,? Fedorov M , et al. Cutting effects induced by 2 μm laser radiation of cw Tm:YLF and cw and Q-switched Ho:YAG lasers on ex-vivo tissue[J]. Medical Laser Application, 2011, 26(2):67-75.
[8] Linjun, Li, Xining, et al. High beam quality passively Q-switched operation of a slab Tm:YLF laser with a MoS2 saturable absorber mirror – ScienceDirect[J]. Optics & Laser Technology, 2019, 112:39-42.
[9]? Duan X M ,? Ding Y ,? Yao B Q , et al. High power acousto-optical Q-switched Tm:YLF-pumped Ho:GdVO4 laser[J]. Optik – International Journal for Light and Electron Optics, 2018, 163:39-42.
[10]? Ding Y ,? Han L ,? Yao B Q , et al. High power Tm:YLF bulk laser wavelength-stabilized by two F-P etalons[J]. Optik – International Journal for Light and Electron Optics, 2015, 126(9-10):990-992.
[11] Y, Ding,? D. X , et al. High power Tm:YLF laser operating at 1.94 μm[J]. Optik International Journal for Light & Electron Optics, 2015.
[12]? Yang X T ,? Mu Y L ,? Zhao N B . Ho:SSO solid-state saturable-absorber Q switch for pulsed Ho:YAG laser resonantly pumped by a Tm:YLF laser[J]. Optics & Laser Technology, 2018, 107:398-401.
[13]? Yokozawa T ,? Izawa J ,? Hara H . Mode control of a Tm:YLF microchip laser by a multiple resonator[J]. Optics Communications, 1998, 145( 1–6):98-100.
[14]? Hecht H ,? Burshtein Z ,? Katzir A , et al. Passive Q-switching of a Tm:YLF laser with a Co2+ doped silver halide saturable absorber[J]. Optical Materials, 2017, 64:64-69.
[15]? Razumova I ,? Tkachuk A ,? Nikitichev A , et al. Spectral-luminescent properties of Tm:YLF crystal[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 1995, 225(1-2):129-132.
[16]? Kalachev Y L ,? Mihailov V A ,? Podreshetnikov V V , et al. The study of a Tm:YLF laser pumped by a Raman shifted Erbium fiber laser at 1678 nm[J]. Optics Communications, 2011, 284(13):3357-3360.

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