Get a quote
Ho:YLF Crystal

POC-OC-122450-Ho:YLF Crystal

  • Long upper laser level lifetime for extended performance.
  • High emission cross-section for efficient lasing.
  • Naturally birefringent material with a weak thermal lensing effect.
  • Operates in a wavelength range optimal for industrial and defense applications.
  • Customizable crystals available upon request to suit specific needs.

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

Click here to Get a Quote

Ho:YLF Crystal Material General Description

Holmium-doped Yttrium Lithium Fluoride (Ho:YLF) is a highly efficient laser crystal material used in various optical applications, including industrial processing, defense, and environmental monitoring. With its naturally birefringent properties, Ho:YLF minimizes thermal lensing effects and ensures stable output. The crystal exhibits a long upper laser level lifetime, enhancing its suitability for Q-switched laser operations. The optimized doping levels, high emission cross-section, and strong absorption make it an ideal choice for generating emission wavelengths around 2060 nm, particularly for pollutant detection and remote sensing. Ho:YLF Crystal also supports customizations such as doping concentrations and coatings to meet user-specific requirements.

 

Ho:YLF Crystal General Applications

Ho:YLF crystals are versatile and cater to a broad range of industries:

  • Environmental Monitoring: Ho:YLF Crystal Used for remote sensing and pollutant detection due to its strong emission properties at 2060 nm.
  • Defense and Security: Ideal for laser systems used in target detection, surveillance, and rangefinding.
  • Medical Applications: Provides precise and controlled energy output for surgical and diagnostic applications, including soft tissue operations.
  • Industrial Processing: Facilitates cutting, welding, and material inspection with high precision and energy efficiency.
  • Scientific Research: Supports experiments requiring mid-infrared wavelength lasers, including spectroscopy and material characterization.

Chemical and Structural Properties

Property

Value

Crystal Structure

Tetragonal

Absorption Peak Wavelength

1940 nm

Emission Wavelength

2060 nm

Absorption Cross-Section

1.2 x 10^-22 cm^2

Emission Cross-Section

1.8 x 10^-22 cm^2

Refractive Index (1064 nm)

n_o = 1.448, n_e = 1.470

Density

3.95 g/cm^3

Mohs Hardness

5

Thermal Conductivity

6 W/m·K

Thermal Expansion Coefficient

10.1 x 10^-6 K^-1 (

Typical Doping Level

0.5%

Optical, Laser and Nonlinear Optical Properties

Optical Property

Value

Absorption Bandwidth

~18 nm

Lifetime of ^5I_7 Energy Level

10 ms

LIDT

>10 J/cm^2 @ 2060 nm, 10 ns

Coating Options

AR coatings at 1900-2100 nm

Standard Fabrication Specifications

Parameter

Specification

Orientation

z-cut

Clear Aperture

>90%

Face Dimension Tolerance

+0.0/-0.1 mm

Length Tolerance

±0.1 mm

Parallelism Error

<20 arc seconds

Perpendicularity Error

<10 arc minutes

Surface Quality

20-10 S-D

Surface Flatness

<λ/10 @ 632.8 nm

Spectrum Transmission Curve:

The materials shows high absorption and emission characteristics at 2060 nm, with minimal losses and high efficiency in the Q-switched regime.

Coating Specification:

 

  • Anti-reflective coating: AR(R < 1%) @ 1900-2100 nm.
  • Coating improves transmission efficiency and reduces scattering losses.
  • 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 the precision fabrication of high-performance crystals. Our extensive experience in laser crystal manufacturing allows us to deliver:

  • Customizable doping levels and dimensions to fit unique application requirements.
  • Superior optical and mechanical quality adhering to the strictest industry standards.
  • Fast turnaround and competitive pricing with excellent after-sales support.

Standard Products

Face Dimensions (mm)

Length (mm)

End Faces

Doping

Coatings

Price (USD)

5 x 5

2

Brewster-angle cut

1%

Uncoated

$620

5 x 5

2

Right-angle cut

1%

AR@1900-2100 nm

$750

8 x 8

2

Brewster-angle cut

1%

Uncoated

$620

8 x 8

2

Right-angle cut

1%

AR@1900-2100 nm

$750

Customization Available

Customizable

Upon request

Custom

Custom coatings

Contact Us

POC-OC-122450-Ho YLF Crystal

Related products