DescriptionSpecifications
Models
Catalog PDF
|
|
|
Newport's UF.25 mirror coating is designed to provide maximum reflectivity and bandwidth with minimum effect on pulse dispersion. This coating is intended for use with ultrashort pulse lasers as a high reflectance beamsteering mirror at 45° angle of incidence. Careful thin film design and an advanced coating process results in a broadband mirror with exceptional performance characteristics. Maximum reflectivity and bandwidth are attained by using these mirrors with s-polarized light.
The UF.25 coating is available on flat precision polished BK 7 substrates in 12.7 mm, 25.4 mm, and 50.8 diameter sizes. |
GVD and the Cubic Term |
Group velocity dispersion (GVD) and the cubic term of the phase expansion are shown for reference. True mirror performance can be affected by manufacturing tolerances and repeatability. Newport minimizes these effects with the use of state-of-the-art thin film production equipment and computer controlled processes. These mirrors have been successfully field tested at several university and industrial laboratories engaged in ultrafast studies and have been found to have high performance very closely matching these calculated curves. |
Laser Damage |
Our ultrafast laser 45° mirrors have been laboratory tested for laser damage. They were found to withstand up to 1 TW/cm2 with 100 fsec pulses at 5 Hz at 800 nm. |
|
|
Specifications
| Material | BK 7, grade A, precision annealed optical glass |
| Surface Flatness S1 | ≤λ/10 at 632.8 nm over the clear aperture |
| Clear Aperture | ≥central 80% of diameter |
| Surface Quality | 15-5 scratch-dig |
| Diameter Tolerance | +0/-0.13 mm |
| Thickness Tolerance | ±0.38 mm |
| Wedge | 30 ±15 arc min |
| Chamfers | 12.7 & 25.4 mm: 0.25-0.76 mm face width x 45° ±15°
50.8 mm: 0.38-0.76 mm face width x 45° ±15° |
| Angle of Incidence | 45° ± 3° |
| S1 Coating | UF.25, Rs >99 %, 700–930 nm, Rp >99 %, 730–870 nm |
| S2 Coating | None |
| Durability | MIL-C-675C, moderate abrasion |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol
on lens tissue recommended (Unknown type Newport.Step.Product.XRefElement) |