Tm: YLF
Tm:YLF crystal case (1)
Size: Ø3×12 mm, Ø3×6 mm;
S1/S2: AR(R<0.5%)792 nm + AR(R<0.2%)1800-1960 nm
Thulium doped yttrium fluoride lithium (Tm: YLF) crystals have a low nonlinear refractive index and thermo optic constant, which are very suitable for the application in the fields of scientific research, production, education, and other optoelectronic fields. Tm: YLF crystal is a negative uniaxial crystal with a negative refractive index temperature coefficient, which can offset some thermal distortion and thus has high beam quality output. The pump wavelength is 792 nm, and the linear polarized laser with the wavelength of 1900nm outputs in the direction of an axis. outputting light from the c axis is non-linear polarized. High power laser output can be obtained by selecting the proper crystal size and doping concentration. Two-micron Tm3+ lasers are of interest for many applications in the scientific, defense, and medical fields. Thulium readily substitutes many crystal hosts that are suitable for high-average-power laser systems and it has an absorption band at ~0.8 μm allowing excitation with commercially available high power laser diodes.
- Low nonlinear refractive index
- Low thermo-optical constant
- Low polarization loss
- Long upper energy level fluorescence lifetime
- Small up-conversion effect
- No absorption loss of sensitized ions
- Medical diagnosis and treatment
- Laser radar
- Laser ranging
- Electro-optical countermeasure
- Laser remote sensing
- Laser imaging
- Optical signal processing
- Material processing
| A compact high efficient Tm:YLF laser dual-end-pumped by an equidirectional-polarizing fiber coupled laser diode at room temperature Optik,Volume 158,50018,Pages 1553-1557 |
| A graphene saturable absorber for a Tm:YLF pumped passively Q-switched Ho:LuAG laser Optik,Volume 127, Issue 5,50016,Pages 3082-3085 |
| A linewidth-narrowed Tm:YLF laser using by two etalons Optik – International Journal for Light and Electron Optics,Volume 126, Issue 19,50015,Pages 2108-2109 |
| A Q-switched Ho:YAG laser with double anti-misalignment corner cubes pumped by a diode-pumped Tm:YLF laser Infrared Physics & Technology,Volume 91,50018,Pages 8-11 |
If you can’t find the Literature you want, Contact us to get the PDF Get the Literature
| Compact passively Q-switched Tm:YLF laser with a polycrystalline Cr:ZnS saturable absorber Optics & Laser Technology,Volume 57,50014,Pages 202-205 |
| Compact self-Q-switched Tm:YLF laser at 1.91μm Optics & Laser Technology,Volume 100,50018,Pages 103-108 |
| Cutting effects induced by 2μm laser radiation of cw Tm:YLF and cw and Q-switched Ho:YAG lasers on ex-vivo tissue Medical Laser Application,Volume 26, Issue 2,50011,Pages 67-75 |
| High beam quality passively Q-switched operation of a slab Tm:YLF laser with a MoS2 saturable absorber mirror Optics & Laser Technology,Volume 112,50019,Pages 39-42 |
| High power acousto-optical Q-switched Tm:YLF-pumped Ho:GdVO4 laser Optik,Volume 163,50018,Pages 39-42 |
| High power Tm:YLF bulk laser wavelength-stabilized by two F-P etalons Optik,Volume 126, Issues 9–10,50015,Pages 990-992 |
| High power Tm:YLF laser operating at 1.94μm Optik,Volume 126, Issues 7–8,50015,Pages 855-857 |
| Ho:SSO solid-state saturable-absorber Q switch for pulsed Ho:YAG laser resonantly pumped by a Tm:YLF laser Optics & Laser Technology,Volume 107,50018,Pages 398-401 |
| Mode control of a Tm:YLF microchip laser by a multiple resonator Optics Communications,Volume 145, Issues 1–6,49998,Pages 98-100 |
| Passive Q-switching of a Tm:YLF laser with a Co2+ doped silver halide saturable absorber Optical Materials,Volume 64,50017,Pages 64-69 |
| Spectral-luminescent properties of Tm:YLF crystal Journal of Alloys and Compounds,Volume 225, Issues 1–2,49995,Pages 129-132 |
| The study of a Tm:YLF laser pumped by a Raman shifted Erbium fiber laser at 1678nm Optics Communications,Volume 284, Issue 13,50011,Pages 3357-3360 |
Parameter
| Concentration Tolerance (atm%) | 2-4 at.% |
| Lattice Constants | 4~5 |
| Orientation | a-cut, other orientations also available |
| Parallelism | <10” |
| Perpendicularity | <5” |
| Surface Quality | 10-5 scratch & dig |
| Wavefront Distortion | λ/8 @ 633nm |
| Surface Flatness | λ/10 @ 633nm |
| Clear Aperture | 95% |
| Length Tolerance | ±0.1 mm |
| Face Dimensions Tolerance | +0/-0,1 mm |
| Protective Chamfers | <0,1 mm at 45˚ |
| Damage Threshold | over 15J/cm2 TEM00, 10ns, 10Hz |
| Crystal Structure | Tetragonal |
| Lattice Constants | a=5.16Å; c=10.85Å |
| Density | 3.99 g/cm³ |
| Melting Point | 819℃ |
| Thermal Conductivity | 6 Wm-1K-1 |
| Thermal Optical Coefficient(dn/dT) | π = 4.3 x 10-6 x °K-1; σ = 2.0 x 10-6 x °K-1 |
| Thermal Expansion /（10-6·K-1@25°C ） | 10.1×10-6 (//c) K-1, 14.3×10-6((//a) K-1 |
| Hardness (Mohs) | 5 |
| Shear Modulus /Gpa | 85 |
| Specific Heat | 0.79 J/gK |
| Poisson Ratio | 0.3 |
| Laser Transition | 3F4→3H6 |
| Laser Wavelength | π:1880 nm; σ:1908 nm |
| Absorption Cross-section at Peak | 0.55×10-20 cm2 |
| Absorption Bandwidth at Peak Wavelength | 16 nm |
| Absorption Peak Wavelength | 792 nm |
| Lifetime of 3F4 Thulium Energy Level | 16 ms |
| Quantum Efficiency | 2 |
| Non-linear Index n2 | 0.6 x 10-13 |
| Optical Quality | < 0.3 x 10-5 |
| Refractive Index @1064 nm | no=1.448, ne=1.470 |
| Laser Induced Damage Threshold | >10 J/cm2@1900 nm, 10 ns |
| Coatings | R<0,5% @792 nm + R<0,15% @1800-1960 nm on both sides; custom coatings also available |
