Thorlabs PF10-03-M02 Enhanced Gold Mirror

🔍 Overview & Key Features

• Diameter & substrate: 1.00″ (25.4 mm) diameter, ~6 mm thick, fused silica substrate

• Coating: Mid‑Infrared Enhanced Protected Gold (suffix M02), which delivers:

  • Average reflectance > 98% across 2 µm to 20 µm,

  • Absolute reflectance > 95% in that range,

  • Excellent performance for angles of incidence between 0° and 45°

• Surface flatness: λ/10 at 633 nm, parallelism < 3 arcmin, clear aperture > 90% of the diameter, surface quality at 40‑20 scratch‑dig

• Laser damage thresholds:

  • Pulsed: ~0.1 J/cm² at 1.064 µm (10 ns, 10 Hz),

  • CW: ~25 W/cm at ≈1.07 µm,

  • Much higher thresholds for 10.6 µm (e.g. 3 J/cm², 450 W/cm²)

• Ideal for: Mid‑infrared optical systems involving quantum‑cascade lasers, mid‑IR supercontinuum sources, gas‑sensing Herriott cells, etc., where reflectivity in the 2–20 µm band is critical