Optics & Ultrafast Laser

Direct Laser Interference Patterning (DLIP) Period & Fluence Calculator

Calculate multi-beam interference spatial periods, constructive peak fluence, and periodic micro-pattern dimensions for biomimetic and anti-microbial surfaces.

Process & CAM Parameters

Laser Wavelength (lambda in nm):

Beam Intersection Angle (theta in degrees):

Total convergence angle between interfering laser beams.

Beam Superposition Configuration:

Average Peak Fluence (F_0 in J/cm2):

Material Ablation Threshold (F_th in J/cm2):

Engineering Calculations

Interference Period (Lambda)

2.04um

Peak Maximum Fluence

5.40J/cm2

Single-Pulse Depth

185nm

Pattern Feature Density

24.0M/cm2

Dynamic CAM Toolpath & Vector Preview

Need complete manufacturing prepress guidance and formulas?

Read the Full DLIP Periodic Micro-Patterning Guide →

Engineering Principles & Formulations

Direct Laser Interference Patterning (DLIP) superimposes two or more coherent laser sub-beams to create deterministic periodic micro- and nano-topographies via optical interference. This enables high-speed single-step fabrication of anti-bacterial medical implants, superhydrophobic aerospace surfaces, and optical diffractive gratings without chemical lithography.

Interference Spatial Period ($\Lambda$): Calculated as $\Lambda = \frac{\lambda}{2 \sin(\theta/2)}$. Smaller intersection angles produce wide pitches; steep angles generate sub-micron features.
Interference Peak Fluence ($F_{\text{peak}}$): Superposition of $N$ coherent beams yields peak intensity scaling as $I_{\text{peak}} = N^2 \cdot I_0$, drastically lowering the global laser pulse energy required.
Ablation Depth ($h_{\text{abl}}$): Governed by Beer-Lambert law $h = \alpha^{-1} \ln(F_{\text{peak}} / F_{\text{th}})$.