Salient Characteristics- 2025-6-17.doc

Salient Characteristics

Commercial Availability Certification:

I have evaluated the commercial marketplace and determined that all of the salient characteristics documented below are available in products/services offered in the commercial marketplace.

Signature (typed name): Rajesh Thapa Technical Point of Contact (TPOC) or Contracting Officer’s Representative (COR)

The Advanced Laser Source Development (ALSD) Team at the Army Research Laboratory (ARL) requires quantity ten (10) 22.5-degree Dichroic Mirrors for use in kilowatt (kW)-class laser, ten (10) 45-degree Turning Mirrors for use in kW-class laser and ten (10) 22.5-degree Turning Mirrors for use in kW-class laser with the following salient characteristics:

1. (Quantity of Ten) 22.5-degree Separators Mirrors for use in kW-class laser:

· The dichroic mirror must handle at least 2 kW of average power.

· The mirror shall have an anti-reflection coating on one surface to minimize light loss, and a high-reflectivity coating on the other surface to reflect the laser at a specific wavelength.

· This mirror shall adhere to tight tolerances for dimensions and surface properties, ensuring minimal imperfections and high accuracy.

The Following are the minimum requirements requested by the Government

· Material: Fused silica

· Coatings: Ion Bean Sputtering (IBS), thin

· Type: Plane mirror, separator

· Diameter: 50.0 millimeters (mm) (tolerance: greater than negative (-) 0.1 mm to less than (<) or equal to 0

· Thickness: 9.5 mm (tolerance: greater than (>) -0.1 mm to less than +0.1 mm)

· Angular Deviation: Three (3) degrees (°) Surface 1 (S1) Specifications:

· Surface Quality: Scratch/Dig: 3/1 (0.2)

· Flatness: Wavelength of Light (L)/10 regularity (within 1/10 of the wavelength of light)

· Surface Roughness: 5/4 x 0.063; L3 x 0.004

· Anti-Reflection Coating:

· Angle of Incidence: 22.5 degrees (°)

· Wavelength Range: 900-1100 nanometer (nm)

· Reflectance: < 0.3 percent (%) Surface 2 (S2) Specifications:

· Surface Quality: Scratch/Dig: 3/1 (0.2)

· Flatness: L/10 regularity (within 1/10 of the wavelength of light)

· Surface Roughness: 5/4 x 0.063; L3 x 0.004

· High Reflectivity Coating:

· Angle of Incidence: 22.5°

· Wavelength: 940-995 nm

· Reflectance: > 99.5%

· Reflectance (Ru):

· Angle of Incidence: 22.5°

· Wavelength: 1020-1050 nm

· Reflectance: < 7%

2. (Quantity of Ten) 45-degree Turning Mirrors for use in kW-class laser:

· Mirror shall be plane, with a commercial polish on one side and a high-reflectivity coating on the other.

· Mirror shall be capable of reflecting the laser at wavelengths between 880 and 990 nm with an efficiency greater than 99.9%.

· The Following are the Government’s Minimum requirements: Material: Fused silica

· Type: Plane mirror

· Diameter (Ø): 50.0 mm (tolerance: greater than -0.1 mm to less than or equal to 0)

· Thickness (t): 9.5 mm (tolerance: greater than -0.1 mm to less than +0.1mm)

· Angular Deviation: Less than five (5) minutes of arc

Surface 1 (S1):

Finish: Commercial polish (a standard level of polishing for general optical applications)

Surface 2 (S2):

· Effective Diameter: 42 mm

· Scratch/Dig: 3/0.2 (0.2)

· Flatness: [L/10]

· Surface Roughness: 5/4 x 0.063; L3 x 0.004

High Reflectivity Coating (HR):

· Angle of Incidence: 45°

· Wavelength Range: 880-990 nm

· Reflectance: HR Greater than 99.9%

3. (Quantity of Ten) 22.5-degree Turning Mirrors for use in kW-class laser:

· Mirror shall be plane, with a commercial polish on one side and a high-reflectivity coating on the other.

· Mirror shall be capable of reflecting the laser at wavelengths between 940 and 1000 nm with an efficiency greater than 99.95%.

· The Following are the Government’s Minimum requirements: Material: Fused silica

· Type: Plane mirror

· Diameter (Ø): 50.0 mm (tolerance: greater than -0.1 mm to less than or equal to 0)

· Thickness (t): 9.5 mm (tolerance: greater than -0.1 mm to less than +0.1mm)

· Angular Deviation: Less than five (5) minutes of arc

Surface 1 (S1):

Finish: Commercial polish (a standard level of polishing for general optical applications)

Surface 2 (S2):

· Effective Diameter: 42 mm

· Scratch/Dig: 3/0.2 (0.2)

· Flatness: [L/10]

· Surface Roughness: 5/4 x 0.063; L3 x 0.004

High Reflectivity Coating (HR):

· Angle of Incidence: 22.5°

· Wavelength Range: 940-1000 nm

· Reflectance: HR Greater than 99.95% Delivery is required twelve weeks after contact award (ACA), and delivery to:

US ARMY RESEARCH LABORATORY 2800 Powder Mill Rd Adelphi, MD 20783.

Contracting Officer:

Template last updated 01/8/2019