T-UM20-45B - Ø2" Low-GDD Ultrafast Mirror, 970 nm - 1150 nm, 45° AOI
T-UM20-45B - Ø2" Low-GDD Ultrafast Mirror, 970 nm - 1150 nm, 45° AOI
- Low Group Delay Dispersion: |GDD| < 30 fs2
- Ideal for Pulses Shorter than 250 fs
- Reflectance Greater than 99%
- Designed for 0° or 45° Angle of Incidence (AOI)
- Sizes Available:
- For 0° AOI: Ø1/2" or Ø1"
- For 45° AOI: Ø1/2", Ø1", or Ø2"
| Item # | T-UM05-45B | T-UM10-45B | T-UM20-45B |
|---|---|---|---|
| Design Wavelength Range | 970 - 1150 nm | ||
| Diameter | 1/2" (12.7 mm) | 1" (25.4 mm) | 2" (50.8 mm) |
| Diameter Tolerance | +0.00 / -0.10 mm | ||
| Clear Aperture | >80% of Diameter | ||
| Thickness | 6.4 mm (0.25") | 9.5 mm (0.37") | 12.0 mm (0.47") |
| Thickness Tolerance | ±0.20 mm | ±0.10 mm | |
| Reflectance | Rs > 99% (970 - 1150 nm) Rp > 99% (1020 - 1080 nm) |
||
| Angle of Incidence | 45° | ||
| Group Delay Dispersion | |GDDs| < 30 fs² (970 - 1150 nm) |GDDp| < 30 fs² (1020 - 1080 nm) |
||
| Laser Induced Damage Threshold | 0.40 J/cm2 (1030 nm, 309 fs FWHM, S-Pol, 1000 Pulses) | ||
| Substrate | Fused Silica | ||
| Front Surface Flatness | λ/4 | λ/6 | <λ/3 |
| Front Surface Quality | 15-5 Scratch-Dig | 20-10 Scratch-Dig | |
| Parallelism | ≤3 arcmin | ≤5 arcmin | |
| Back Surface | Polished | Fine Ground | |