Get a quote
Er:Cr:YSGG Crystal

POC-OC-122439-Er:Cr:YSGG Crystal

  • Low Laser Threshold: The lowest threshold among common Erbium-doped crystals.
  • High Slope Efficiency: Provides exceptional energy conversion efficiency.
  • Wide Pumping Range: Supports CW, free-running, and Q-switched operation.
  • High Optical Quality: Exhibits stable chemical properties and long fluorescence lifetime.
  • Intrinsic Crystal Disorder: Enables broader pump linewidths and excellent tunability.

Customizable Components Available for This Material to Meet Your Specific Needs!

Click here to Get a Quote

Er:Cr:YSGG Crystal Material General Description

The Er:Cr:YSGG (Erbium and Chromium-doped Yttrium Scandium Gallium Garnet) crystal is a high-performance laser crystal known for generating 2800 nm light in a critical water absorption band. It boasts high conversion efficiency, stable chemical durability, and a long fluorescence lifetime, making it one of the most promising laser media. The crystal operates efficiently under CW or pulsed laser conditions, making it versatile for dental lasers, environmental sensing, optical communication, and military applications. Due to its intrinsic structural properties, Er:Cr:YSGG Crystal  has excellent tenability, increasing its appeal across diverse scientific and industrial domains.

 

Er:Cr:YSGG Crystal General Applications and Examples

Er:Cr:YSGG is extensively used in several advanced applications due to its high energy efficiency and versatility:

  • Medical Lasers: Used in dental surgeries and hard tissue ablation. Its absorption peak aligns perfectly with water content in biological tissues, ensuring high precision and minimal collateral damage.
  • Environmental Sensing: Suitable for remote water vapor sensing and environmental research, leveraging its 2800 nm emission for high absorption efficiency in water molecules.
  • Optical Communications: Facilitates optical amplifications and secure wavelength transmission in specialized communication systems.
  • Military Applications: Utilized in defense systems for remote target sensing, range finding, and LIDAR technologies due to its high power output and robust design.
  • Scientific Research: Applied in spectroscopy and material analysis for studying molecular structures, leveraging its stable energy efficiency and precise wavelength range.

Chemical and Structural Properties

Property

Specification

Crystal Structure

Cubic, Garnet

Chemical Formula

Y3Sc2-xGaxGa3O12

Lattice Parameter

12.42 Å

Dopant Concentration

Cr: 0.5 × 10^20 (atoms/cm³), Er: 4 × 10^21 (atoms/cm³)

Growth Method

Czochralski

Density

5.67 g/cm³

Refractive Index

1.92 at 1000 nm

Thermal Expansion Coefficient

8.1 × 10^-6 K⁻¹

Thermal Conductivity

8 W/m/K

Mohs Hardness

8 Mohs

Thermo-optical Factor

12.3 × 10^-6 K⁻¹

Emission Cross-section

5.2 × 10^-20 cm²

Fluorescence Lifetime

1400 µs

Optical, Laser and Nonlinear Optical Properties

Parameter

Value

Laser Wavelength

2800 nm

Peak Absorption Cross-section

5.2 × 10^-20 cm²

Fluorescence Lifetime

1400 µs

Thermo-optical Coefficient

12.3 × 10^-6 K⁻¹

Emission Linewidth

Broad and tunable

Pump Source

Diode-pumped via Cr or Er bands

Mode of Operation

CW, free-running, Q-switched

Standard Fabrication Specifications

Specification

Value

Rod Size

Diameter: 3–6 mm, Length: 50–120 mm

Surface Quality

10/5 per MIL-PRF-13830B

Flatness

< λ/8 @ 633 nm

Parallelism

<20 arc sec

Perpendicularity

<15 arc min

Chamfer

<0.2 mm × 45°

Coating Options

AR-coated or HR-coated upon request

Spectrum Transmission Curve:

The absorption spectrum for Er:Cr:YSGG demonstrates strong peaks around 2800 nm, aligning well with water molecule absorption. Its broad tunability and strong fluorescence peaks enhance its utility in high-precision applications

Coating Specification:

 

  • AR Coating: Designed for 2800 nm with <0.2% reflectivity.
  • HR Coating: Custom coatings available upon request for specific applications.
  • Adhesion Test Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.

 

POC Strength and Capabilities

 

Photonics On Crystals (POC) specializes in advanced laser crystal manufacturing, offering unmatched precision and quality assurance. Our Er:Cr:YSGG crystals are tailored for cutting-edge applications in medical, environmental, and defense fields. With a strong emphasis on customization and rigorous quality control, POC ensures its crystals exceed industry standards.

Standard Products

Dimensions

Length

End Faces

Doping

Coating

Price (USD)

3 × 3 mm

10 mm

Brewster-angle cut

Cr, Er doped

Uncoated

$450

4 × 4 mm

20 mm

Right-angle cut

Cr, Er doped

AR-coated @2800 nm

$500

5 × 5 mm

30 mm

Brewster-angle cut

Cr, Er doped

HR-coated

$600

Customization

As needed

As needed

As requested

As requested

Request Quote

POC-OC-122439-Er Cr YSGG Crystal

Related products