Laser Crystals: YLF Crystal Series

We grows and processes all kinds of YLF crystal (Yttrium Lithium Fluoride): Nd:YLF, Pr:YLF, Tm:YLF, Yb:YLF, Ho:YLF and YLF diffusion bonded crystal, etc.

Our advantage: Lower than the market price with good quality

1. Nd:YLF

Nd:YLF is an excellent crystal for modelocked operation because it combines the characteristics of weak thermal lensing, large fluorescence line width and naturally polarized oscillation.

■ Advantages of Nd:YLF Crystals：

• High power, low beam divergence, efficient single mode operation
• High average power Q-switching at a moderate repetition rate
• Linear polarized resonators for Q-switching and frequency doubling
• Potential uniform mode for large diameter rods or slabs
• Stimulated emission cross section is favorable for low CW threshold

Thermal lensing lower than that of YAG

1053nm output of Nd:YLF matches gain curves of Nd:Glass and performs well as an oscillator and pre-amplifier for this host.

2. Tm:YLF

Tm:YLF is the important middle infrared laser crystal. Because Tm:YLF is negative uniaxial crystal, whose thermal refractive index coefficient is negative, some thermal distortion may be counteracted and high-quality light can be output. Conveniently pumped at 792nm, 1.9μm linearly polarized beam is output in a axis, and non-linearly polarized beam is output in c axis.

■ Advantages of Tm:YLF Crystals：

• Linearly polarized output beam
• Little heat effect while laser
• Effective cross relaxing of Tm ions
• Relatively high efficiency with LD pumping

3. Ho:YLF

Ho:YLF is the important middle infrared laser crystal. Ho:YLF pumped ZGP crystal at 1.9μm, so 2.05μm linearly polarized beam can be output.

■ Advantages of Ho:YLF Crystals：

• Linearly polarized output beam
• Little heat effect while laser
• Conveniently pumped at 1.9μm

4. Pr:YLF

Only few laser materials have necessary properties for realization of lasing in visible spectral range. Trivalent praseodymium (Pr³⁺) is known to be an interesting laser ion for using with solid-state lasers in the visible spectral range because of its energy levels scheme, providing several transitions in the red (640 nm, ³P₀ to ³F₂), orange (607 nm, ³P₀ to ³H₆), green (523 nm, ³P₀ to ³H₅), and dark-red (720 nm, ³P₀ ³F₃⁺³F₄) spectral regions. Pr³⁺:YLF has been found as promising laser material for producing visible lasers directly.

5. Yb:YLF

Yb³⁺:YLF laser crystals have better thermo-optical properties than isotropic host like YAG, its large thermal conductivity provides efficient heat extraction. Moreover, Yb³⁺:YLF has wide emission cross-section, with peak value at the lasing wavelength comparable to that found in

Yb³⁺:Sr₃Y(BO₃)₃ and Yb³⁺:Ca₄GdO(BO₃)₃ laser crystals.. Also, YLF crystal has advantage by ytterbium ions to be doped to a high degree.