Wide Band Large Aperture Beam Director Head Window
Navy SBIR 2020.1 - Topic N201-052
NAVSEA - Mr. Dean Putnam - email@example.com
Opens: January 14, 2020 - Closes: February 12, 2020 (8:00 PM ET)
PROGRAM: NAVSEA 073, Advanced Submarine Systems Development
technology within this topic is restricted under the International Traffic in
Arms Regulation (ITAR), 22 CFR Parts 120-130, which controls the export and
import of defense-related material and services, including export of sensitive
technical data, or the Export Administration Regulation (EAR), 15 CFR Parts
730-774, which controls dual use items. Offerors must disclose any proposed use
of foreign nationals (FNs), their country(ies) of origin, the type of visa or
work permit possessed, and the statement of work (SOW) tasks intended for
accomplishment by the FN(s) in accordance with section 3.5 of the Announcement.
Offerors are advised foreign nationals proposed to perform on this topic may be
restricted due to the technical data under US Export Control Laws.
Develop a new, environment-friendly, wide spectral band (from visible to mid
wave infrared (IR)), high optical transmission (> 99.9% near IR) band, and
high strength hydrophobic, greater than 12-inch diameter) submarine beam
director head window materials.
The Navy requires an innovative material solution for new large aperture
(greater than 12 inch in diameter) and wide spectral band (broadband) optical
development for High Energy Laser (HEL) beam director head window with
anti-reflection coating (ARC) and water shedding or hydrophobicity ability. At
present, there is no large aperture broad spectral band commercially available
for a high strength, extreme low loss head window is available. The head window
shall be broadband (0.5 to 5 µm) and high strength with a greater than 99.9%
transmission at near IR wavelength. The bandwidth of the material shall be
within greater than 80% - both in visible and MWIR band. The head window shall
also have near broadband (visible to MWIR) ARC, water-shedding (hydrophobicity),
non-fouling and service life performance of the HEL beam director head windows
(or imaging windows).
Develop a concept for new and innovative materials for wide spectral band large
aperture beam director head windows. Conduct a feasibility study to demonstrate
the viability of the proposed broadband high transmission materials with RAR
coating through modeling and simulation. The Phase I Option, if exercised, will
include the initial design specifications and capabilities description to build
a prototype solution in Phase II.
Develop the window material, ensuring that the materials will support RAR,
hydrophobic, non-fouling technology. Develop large aperture window materials
for HEL application. Document the results and demonstrate the feasibility of
the manufacturing concepts. Identify suitable candidate materials (e.g.,
sapphire, spinel, and ALON), low transmission loss (less than 0.1%) processes
at 1 µm, and transmission higher than 90% (both in 0.5 and 5 µm spectral
band). Ensure that the concept highlights process techniques to improve HEL
beam director head window hydrophobicity and RAR. Propose the selection of a
final material for window materials and AR coating and hydrophobicity
technology candidate(s). Develop and deliver a large aperture (12 inches
diameter) low transmission loss (at 1 µm, > 99.9%), hydrophobicity and AR
coating window material test coupon to the Navy lab to carry laser power (less
than 100kW), environmental and stress test. Characterize the head window
service life and determine service life protocols (e.g., service life,
in-service maintenance) for the developed AR coating on actual head window
materials. Develop a Phase III plan.
DUAL USE APPLICATIONS: Support the Navy in transitioning the technology for operational
use. Manufacture the successful materials, hydrophobicity, and coating based on
the mechanical and environmental constraints of the HEL beam director.
R.G. and Freiman, S.W. “Correlation of Fracture Toughness and Strength.” J. Am.
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Electro-Optics; Hydrophobic; Hydrophobicity; Non-Fouling; Non-Hazardous; Marine
Wave Boundary Layer; MWBL; High-energy Laser Beam Director; HEL