Name: Thulium-Doped Yttrium Lithium Fluoride Crystal | Tm:YLF Crystal
Brand: Heeger Materials Inc
SKU: HM2861

Data sheet

Density	3.95 g/cm³
Materials	Tm:YLF Crystal

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Thulium-Doped Yttrium Lithium Fluoride (Tm:YLF) Crystal has a strong absorption peak near 792 nm, making it suitable for diode pumping. It features a cross-relaxation process that generates two ions per absorbed photon in a higher energy state. Tm:YLF lasers are ideal for pumping Ho:YAG lasers due to their spectral overlap and ability to produce linearly polarized output. The crystal’s refractive index decreases with temperature, causing negative thermal lensing, which is partly compensated by a positive lens effect. Additionally, Heeger Materials offers various Tm3+ (Thulium)-doped laser gain media, including Tm:YLF and Tm:KYW crystals, for diverse applications.

Thulium-Doped Yttrium Lithium Fluoride Crystal | Tm:YLF Crystal

Tm:YLF Crystal Properties

Absorption Peak Wavelength	792 nm
Absorption Cross-section at Peak	0.55 × 10⁻²⁰ cm²
Absorption Bandwidth at Peak Wavelength	16 nm
Laser Wavelength	1900 nm
The lifetime of ³F₄ Thulium Energy Level	16 ms
Emission Cross-section @ 1900 nm	0.4 × 10⁻²⁰ cm²
Refractive Index @ 1064 nm	n₀ = 1.448, nₑ = 1.470
Crystal Structure	Tetragonal
Density	3.95 g/cm³
Mohs' Hardness	5
Thermal Conductivity	6 W/m*K
dn/dT	-4.6 × 10⁻⁶ (//c) K⁻¹, -6.6 × 10⁻⁶ (//a) K⁻¹
Thermal Expansion Coefficient	10.1 × 10⁻⁶ (//c) K⁻¹, 14.3 × 10⁻⁶ (//a) K⁻¹
Typical Doping Level	2-4 at.%

Tm:YLF Crystal Specifications

Crystal Orientation	a-cut
Clear Aperture	>90%
Dimension Tolerance	+0/-0.1 mm
Length Tolerance	±0.1 mm
Parallelism Error	<10 arcsec
Perpendicularity Error	<10 arcmin
Chamfer Protection	<0.1 mm at 45˚
Surface Quality	10-5 S-D
Surface Flatness	<λ/10 @ 632.8 nm
Coating	AR (R<0.5%) @ 792 nm + AR (R<0.2%) @ 1800-1960 nm
Laser Damage Threshold	>10 J/cm² @ 1900 nm, 10 ns

Tm:YLF Crystal Absorption and Emission Curve

Tm:YLF Crystal Key Advantages

Strong absorption band for laser diode pumping
Weak thermal lensing
High polarization purity
Custom crystals are available upon request

Tm:YLF Crystal Applications

Lidar Systems for Remote Sensing: Used in laser radar (LIDAR) systems for precise distance measurements and environmental mapping in remote sensing applications.
Pump Source for Ho:YAG Lasers: Tm:YLF is an efficient pump source for Ho:YAG lasers, leveraging its spectral overlap for optimal performance in high-power laser systems.
Medical Laser Systems: Applied in medical lasers, particularly for treatments involving precise tissue interaction and high-energy pulses, such as in urology and dermatology.
Pulsed Lasers for Materials Processing: Used in pulsed laser systems for material processing applications like cutting, engraving, and marking due to its ability to produce short, intense pulses.
Scientific Research and Spectroscopy: Tm:YLF is utilized in scientific experiments and spectroscopy due to its stable emission properties and tunability in various research environments.

Tm:YLF Crystal Packing And Shipping

Thulium-Doped Yttrium Lithium Fluoride (Tm:YLF) Crystal will be securely packaged in sturdy containers with cushioning materials to prevent movement or damage during shipping. This careful packaging ensures that the product arrives in perfect condition, maintaining its high-quality standards throughout the delivery process.

Where to Buy Tm:YLF Crystal in Bulk?

Heeger Materials Inc., a professional supplier and manufacturer of high-quality Laser Crystals products including Thulium-Doped Yttrium Lithium Fluoride (Tm:YLF) Crystal, leverages extensive expertise in supply and export to offer competitive prices. We provide customized solutions to meet specific requirements, ensuring exceptional quality and customer satisfaction.

Heeger Materials Inc. was established in 2016 in Colorado, USA. We specialize in premium-grade metals, alloys, ceramics, powders, and other materials catering to research, development, and large-scale industrial production in scientific and industrial sectors.

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