Er,Yb:YAB

CRYLINK’s erbium, ytterbium co-doped aluminum borate yttrium crystal products, also known as Er,Yb:YAB crystals. It is a kind of laser glass product with excellent comprehensive performance. It is widely used in telecommunication system, radar monitoring and laser field. The product is characterized by high thermal conductivity, high absorption and emission cross-sections, and wide absorption bandwidth. It can be used in ultra-short mode-locked lasers, laser radar, passive Q-switched lasers, eye safety (1.5-1.6 μm) laser products.

Product Parameters

SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Absorption peak wavelength	976 nm
Absorption cross-section at peak wavelength	2.7×10^-20 cm²
Absorption Bandwidth at peak wavelength	17 nm
Laser wavelength	1522, 1531, 1543, 1550, 1602 nm
Lifetime of ⁴I_13/2 erbium energy level	0.32 ms
Emission cross-section@1531 nm	2.5×10^-20 cm²
Yb to Er energy transfer efficiency	>90 %
Refractive index@632.8 nm	n_o=1.7757, n_e=1.7015
Crystal structure	Trigonal
Density	3.84 g/cm³
Mohs hardness	7.5
Thermal conductivity	7.7 (//a), 6 (//c) Wm^-1K^-1
dn/dT	1.4×10^-6 (//a), 4.8×10^-6 (//c) K^-1
Thermal expansion coefficient	2×10^-6 (//a), 9.5×10^-6 (//c) K^-1
Typical doping level	1-2 at.% [Er] 8-15 at.% [Yb]

STANDARD SPECIFICATIONS

Er, Yb:YAB Crystal
Orientation	c-cut
Clear aperture	>90%
Face dimensions tolerance	+0,0/-0,1 mm
Length tolerance	±0,1 mm
Parallelism error	<10 arcsec
Perpendicularity error	<10 arcmin
Protective chamfers	<0,15 mm at 45˚
Surface quality	10-5 S-D
Surface flatness	<λ/10@632,8 nm
Coatings	AR@(R<1%) @940 nm + AR(R<0,25%) @1480-1600 nm
Laser-induced damage threshold	>10 J/cm²@1550 nm, 10 ns