1540nm 1645nm Er Yb Co-doped YAG Laser Crystal

1540nm 1645nm Er Yb Co-doped YAG Laser Crystal Product Description

The Er,Yb:YAG laser crystal (1540 nm) serves as the gain medium for generating eye-safe lasers in the 1.5 μm wavelength range. Leveraging the efficient sensitization of Er³⁺ by Yb³⁺, the crystal can be directly pumped by 940 nm or 980 nm semiconductor lasers to produce high-beam-quality output in the 1450–1650 nm range—specifically at 1540 nm and 1645 nm. Compared to Er-doped glass, it offers superior thermal properties, enabling high-repetition-rate and high-power operation.

Asin Optics supplies Er,Yb:YAG crystal components characterized by excellent optical homogeneity, low scattering loss, and precise doping concentrations. These crystals are ideal for applications requiring high repetition rates and high power, such as medical aesthetic lasers, scientific research equipment, and laser ranging systems.

1540nm 1645nm Er Yb Co-doped YAG Laser Crystal Key Features

1. Er,Yb-codoped YAG laser crystals can output laser radiation at 1540 nm and 1645 nm, both of which are eye-safe wavelengths.
2. The efficient energy transfer from Yb³⁺ to Er³⁺ helps lower the lasing threshold.
   Compared to Er:glass, the YAG host offers higher thermal conductivity, enabling operation at higher power levels and higher repetition rates.
3. We offer flexible customization based on customer requirements—including variations in doping concentration, crystal orientation, dimensions, and shape—as well as optical coating and bonding services.

Why Choosing Our 1540nm 1645nm Er Yb Co-doped YAG Laser Crystal

1. We independently manage the entire production chain—from orientation cutting, grinding, and polishing to coating and inspection—ensuring full control over quality.
2. We adhere to rigorous quality inspection standards; every crystal undergoes strict testing using interferometers, spectrophotometers, and polarimeters.
   We offer customers a wide range of options, including various doping ratios, non-standard dimensions and shapes, and complex, high-damage-threshold coatings. Our comprehensive customization capabilities allow us to tailor products precisely to specific customer requirements.

1540nm 1645nm Er Yb Co-doped YAG Laser Crystal Custom Capability

1540nm 1645nm Er Yb Co-doped YAG Laser Crystal Applications

Laser Ranging and Radar Imaging

The 1540 nm and 1645 nm wavelengths are eye-safe, posing a low risk of retinal damage. Additionally, these wavelengths fall within atmospheric transmission windows, offering strong penetration capabilities through smoke and haze. Consequently, Er,Yb:YAG crystals can be fabricated into cylindrical rods or slabs—with anti-reflective coatings for pump and laser wavelengths applied to the ends—and placed within a resonant cavity. By employing 940 nm or 980 nm laser diodes (LDs) for end-pumping or side-pumping, pulsed laser output at 1540 nm or 1645 nm is generated for applications such as laser ranging and 3D radar imaging.

Medical Aesthetic Lasers

The water absorption coefficient at 1540 nm lies between those of the 2940 nm and 1064 nm wavelengths, making it highly desirable for medical aesthetic applications. This wavelength allows the laser to penetrate the epidermis and act upon the dermis—stimulating the production of new collagen—without damaging the epidermal layer. It is ideally suited for non-ablative skin rejuvenation and the treatment of conditions such as acne scars, wrinkles, and stretch marks.

Mid-Infrared Laser Pump Sources for Scientific Research

Er,Yb:YAG lasers operating at 1540 nm and 1645 nm deliver high-brightness, high-beam-quality pulses, serving as ideal pump sources for mid-infrared nonlinear crystals. They enable the generation of mid-infrared laser light in the 3–5 μm range, making them highly suitable for scientific research in fields such as molecular spectroscopy and nonlinear optics.