Typical "AR" Specifications
- %R < 0.05% @ λ1
- LDT > 4GW/cm2, 1064nm, 7ns
- Surface Quality < 10-5
- Meet environmental specifications of Mil-C-48497
Electron-Beam Gun
We offer a special line of MaxCoat™ Electron-Beam (E-Beam) coatings that are optimized for high laser damage thresholds from 355nm – 2140nm. MaxCoat™ coating processes are tailored for specific applications from ultra-fast to CW and are available for all of our laser crystals and laser grade optics. E-Beam processing is the most commonly used deposition process for laser applications and is an economical solution for many applications that require high laser damage threshold coatings.
MAXCOAT™ "AR" Designs | ||||||
---|---|---|---|---|---|---|
Design# | Crystal | Description | Typical Spectral Specification | Typical Laser Damage Threshold | ||
Fluence | Power Density | Conditions | ||||
A1500 | Nd:YAG | AR @ 1064nm | R < 0.2% | 60J/cm2 | 3GW/cm2 | 20ns, 20Hz, 0.5mm spot |
A1505 | CTH:YAG | AR @ 2080-2140nm | R < 0.2% | 19kJ/cm2 | 126MW/cm2 | 150µs, 5Hz, 90µm spot |
A2500 | Nd:YLF | AR @ 1047-1053nm | R < 0.2% | 60J/cm2 | 3GW/cm2 | 20ns, 20Hz, 0.5mm spot |
A3500 | TGG | AR @ 1064nm | R < 0.2% | 60J/cm2 | 3GW/cm2 | 20ns, 20Hz, 0.5mm spot |
A4500 | Nd:YVO4 | AR @ 1064nm | R < 0.2% | 60J/cm2 | 3GW/cm2 | 20ns, 20Hz, 0.5mm spot |
A5100 | Alexandrite | AR @ 755nm, Long Pulse | R < 0.2% | 12.3kJ/cm2 | 61.5MW/cm2 | 200µs, 2Hz, 28µm spot |
A5150 | Alexandrite | AR @ 755nm, Short Pulse | R < 0.2% | 9J/cm2 | 16GW/cm2 | 500ps, 5Hz, 2mm spot |
A5203 | Co:Spinel | AR @ 1530-1550nm | R < 0.2% | 60J/cm2 | 3GW/cm2 | 20ns, 20Hz, 0.5mm spot |
A5500 A5501 |
KTP | Dual AR @ 1064 & 532nm | R < 0.2% @ 1064nm R < 0.4% @ 532nm |
25J/cm2 12.5J/cm2 |
2.5GW/cm2 1.25GW/cm2 |
10ns, 20Hz, 1064nm 10ns, 20Hz, 532nm |
A1501 | Nd:YAG | AR @ Nd:YAG λ's | R< 0.5% @ 1064-1440nm | 40J/cm2 | 2GW/cm2 | 20ns, 20Hz, 0.5mm spot |
A1504 | Nd:YAG | DualAR @ 808 & 1064nm | R < 0.25% @ both | 40J/cm2 | 2GW/cm2 | 20ns, 20Hz, 0.5mm spot |
A1523 | Nd:YAG | DualAR @ 1064 & 1319nm | R < 0.25% @ both | 40J/cm2 | 2GW/cm2 | 20ns, 20Hz, 0.5mm spot |
A2501 | Nd:YLF | DualAR @ 808 & 1053nm | R < 0.25% @ both | 40J/cm2 | 2GW/cm2 | 20ns, 20Hz, 0.5mm spot |
MAXCOAT™ "HR" Designs | ||||||
Design# | Crystal | Description | Spectral Spec | Typical Laser Damage Threshold | ||
Laser Fluence | Power Density | Conditions | ||||
H1500 | Nd:YAG | HR @ 1064, HT @ 780-825nm | R > 99.9% T > 97.5% |
80J/cm2 | 4GW/cm2 | 20ns, 20Hz, 0.5mm spot |
H2501 | Nd:YLF | HR @ 1053, HT @ 790-808nm | R > 99.5% T > 97% |
60J/cm2 | 3GW/cm2 | 20ns, 20Hz, 0.5mm spot |
Evaporative Thermal Source
We provide thermally evaporated single layer MgF2 coatings on Nd:YAG and TGG for select applications. Our proprietary process was developed to achieve maximum laser damage thresholds for this type of processing and we routinely produce coatings that exceed 40J/cm2, 20ns, 20Hz, 1064nm.
Standard Single Layer MgF2 "AR" Coatings for YAG | |||
---|---|---|---|
Design# | Crystal | Description | Typical Spectral Specification |
A1000 | Nd:YAG | AR @ 1064nm, 0° | R < 0.2% |
A1006 | Nd:YAG | AR @ 808nm, 0° | R < 0.2% |
A1017 | Nd:YAG | AR @ 532nm, 0° | R < 0.2% |
A1074 | Nd:YAG | AR @ 1123nm, 0° | R < 0.2% |
A1075 | Nd:YAG | AR @ 1319nm, 0° | R < 0.2% |
A1079 | Nd:YAG | AR @ 1064nm, 15 - 30° | R < 0.25% |
Standard Single Layer MgF2 "AR" Coatings for TGG | |||
---|---|---|---|
Design# | Crystal | Description | Typical Spectral Specification |
A1131 | TGG | AR @ 1064nm, 0° | R < 0.1% |
A1142 | TGG | AR @ 1000 - 1100, 0° | R < 0.25% |
A1143 | TGG | AR @ 1550nm, 0° | R < 0.2% |
A1145 | TGG | AR @ 1090nm, 0° | R < 0.2% |
A1149 | TGG | AR @ 1336nm, 0° | R < 0.2% |
A1157 | TGG | AR @ 780nm, 0° | R < 0.2% |
![Ion Assist Electron-Beam](https://cdn.northropgrumman.com/-/jssmedia/Project/Northrop-Grumman/ngc/space/synoptics/synoptics/Synoptics-ION-ASSIST-ELECTRON-BEAM-GUN.jpg?mw=3840&rev=2e028031978a4cfdb797944c687947af)
Ion Assist Electron-Beam
In conjunction with our E-Beam coating we have the capability of doing Ion-Assisted Deposition (IAD) for applications that require thin films with high packing density but still require the attributes of E-Beam coatings. In this process a directed low energy ion beam is introduced to the E-Beam coating process to add energy and accelerate the coating molecules to the substrate. This is a low temperature process and can be used on substrates that are sensitive to heat.
Comparison Matrix
| 1Thermal Evaporation | E-Beam Evaporation | Ion-Assist E-Beam Evaporation | IBS Traditional | IBS Quasi-Rugate |
---|---|---|---|---|---|
Cost | $ | $$ | $$ | $$$$ | $$$$ |
Load Capacity | Moderate | High | High | Moderate | Moderate |
Precision | Moderate | Good | Good | Excellent | Excellent |
Run to Run Variance | Moderate | Good | Good | Excellent | Excellent |
Density | Porous | Porous | Dense | Near Bulk | Near Bulk |
Water Shift | High | Moderate | Low | None | None |
Surface Roughness | ≈10-15ÅRMS | ≈8-10ÅRMS | ≈6ÅRMS | < 1ÅRMS | < 1ÅRMS |
Durability | Moderate | Good | Very Good | Excellent | Excellent |
Laser Damage Threshold (1064nm AR) | Good | Excellent | Very Good | Moderate | Excellent |
Lowest %R build spec | R <0.1%@λI | R <0.05%@λI | R <0.05%@λI | R <0.005%@λI | R <0.02%@λI |
1 - Thermal evaporation coatings limited to single layer Magnesium Fluoride on Nd:YAG and TGG
Northrop Grumman SYNOPTICS
1201 Continental Boulevard
Charlotte, NC 28273
Phone: 704-588-2340 | Fax: 704-583-5851
Email