Er Glass

Product Detail

Description




Er glass for 1550nm eye safe laser used for nanosecond rangefinder with passive or active q-switch and high repetition rates(1-6hz), flash lamps and diode pumped laser system. In dermatology, Er glass laser is applied to Fractional laser and treatment of ance scar, skin, wrinkles and melisma. Different concentration and type (Cr14 and EAT14) could customized.




Erbium and ytterbium co-doped phosphate glass has a broad application because of the excellent properties. Mostly, it is the best glass material for 1535nm laser due to its eye-safe wavelength of 1535 nm and high transmission through atmosphere. It’s also suitable for medical applications where the need for eye protection may be difficult to manage or diminish or hinder essential visual observation.

We can also produce erbium laser glass with various ions doping according to your requirement. WM4: Erbium phosphate glass for ion-exchange purpose; Cr14: Erbium phosphate glass for xenon lamp pumping laser device and laser range-finder. EAT14: Yb³⁺, Er³⁺ Co-doped phosphate glass. CrE5 is for large energy output application. The glass rod of CrE5 can work safely at 1Hz repetition after surface strengthing treatment at over 10J output level.




Features


• Wide pump band

• High optical quality

• Operates in a long-wavelength, high water peak region

• Ideal for hard tissue removal

• Very high slope efficiency

• Operate in a relatively eye-safe wavelength range




Applications

• Laser resurfacing

• Bone surgery

• Dental use




Chemical and physical properties


Property	Value	Value	Value	Value
Products	Cr14	CrE5	WM4	EAT14
Orientation	[100] or [110]  ±0.5°	[100] or [110]  ±0.5°	[100] or [110]  ±0.5°	[100] or [110]  < ±0.5°
Mass density	3.10 g/cm3	2.95 g/cm3	2.83g/cm3	3.06 g/cm3
Mohs hardness	8.5	8.5	8.5	8.5
Young's modulus	57.6 GPa	57.6 GPa	57.6 GPa	57.6 GPa
Tensile strength	2 GPa	2 GPa	2 GPa	2 GPa
Melting point	1970°C	1970°C	1970°C	1970°C
Thermal conductivity	0.70	0.80	0.70	0.70
Specific Heat/(J·g-1·K-1)	0.59	0.59	0.59	0.59
Thermal Expansion /(10-6   /°C@25°C )	127	87	96	95
Thermal shock resistance parameter	800 W/m	800 W/m	800 W/m	800 W/m
Refractive Index @ 1535 nm	1.530	1.533	1.528	1.524




Optical properties


Property	Value
Optical Density	0.1 to 0.8
Fluorescence lifetime	7.7-8.2 ms
Concentrations	0.5 mol % ~ 3 mol %
Emission wavelength	1535 nm
Absorption Coefficient	1.0 cm-1 ~ 7 cm-1
Emission state absorption cross section:	0.75x10-20 cm2@1535nm
Transmission	10% to 90%
Coatings	AR= 0.2% @1535nm
Damage Threshold:	> 500 MW / cm2




Polishing Specification

Property	Value
Orientation Tolerence	< 0.5°
Thickness/Diameter Tolerance	±0.05 mm
Surface Flatness	<?/8@632 nm
Wavefront Distortion	<?/4@632 nm
Surface Quality	10/5
Parallel	10?
Perpendicular	15´
Clear Aperture	>90%
Chamfer	<0.1×45°
Maximum dimensions	dia (3-12.7)×(3-150)mm2