DOD SBIR 24.1 BAA

Active
No
Status
Closed
Release Date
November 29th, 2023
Open Date
January 3rd, 2024
Due Date(s)
February 21st, 2024
Close Date
February 21st, 2024
Topic No.
N241-041

Topic

High Power Optical Splitter for Laser Weapon Systems

Agency

Department of DefenseN/A

Program

Type: SBIRPhase: BOTHYear: 2024

Summary

The Department of Defense (DOD) is seeking proposals for the development of a high power optical splitter for laser weapon systems. The Navy is specifically interested in a technology that can efficiently split the power of a high energy laser beam into two outputs. The splitter should be capable of handling a minimum of 300 kW of continuous wave input power at a wavelength of 1.0 micron. The Navy is looking for a solution that can switch the entire beam between two channels or split the beam fractionally between channels, with desired power split ratios of 50/50 to 20/80. The solution should not degrade the beam quality of the input beam by more than 5%. The technology should be fundamentally rugged, require no manned intervention during operation, and have a transmission efficiency of at least 95%. The proposed solution should include means for test and demonstration on surrogate hardware. Phase I of the project involves developing a concept and demonstrating its feasibility, while Phase II focuses on developing and delivering a prototype. The resulting technology is expected to have broad military applications and potential uses in high energy physics, machining, food packaging, and solar energy industries. The solicitation is closed, and more information can be found on the DOD SBIR website.

Description

OUSD (R&E) CRITICAL TECHNOLOGY AREA(S): Directed Energy (DE)

 

The 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 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.

 

OBJECTIVE: Develop a capability to efficiently split the power of a high energy laser beam into two outputs.

 

DESCRIPTION: The Navy is fielding a family of high energy laser (HEL) weapons designed for surface ship self-defense. As the output power of these systems has been steadily evolving, the realities of shipboard implementation are coming to the forefront. This includes issues of cost, size, weight, and power consumption on the one hand, and issues of employment and tactical effectiveness on the other. HEL weapon systems can be divided into two main sub-systems: the sub-system that generates the laser power and forms a high quality output laser beam, and the laser beam director that places and holds the beam on target. Between these two units is an optical path that is essentially lossless.

 

The laser generation hardware is housed below deck in an environmentally controlled space. The beam director is mounted above deck, preferably as high on the ship’s structure as practical. The complete functional independence of the two units and the lossless path between the two make this possible. It also makes it possible, in theory, to supply multiple beam directors from the same laser power source. Theoretically, this would then provide a cost-effective means for providing full coverage around the perimeter of a vessel without the need for multiple laser power sources. Currently there is no commercial capability that can split a high power laser beam.

 

The Navy needs a technology for splitting a high power laser beam into two separate channels (optical paths). The splitter is intended to be placed in the optical path between the laser source and beam director(s). An optical splitter that can switch the entire beam between two channels is the minimum requirement. However, a technology that can split the bream fractionally between channels is most attractive. The ratio of power split between the paths can be continuous or fixed to discrete increments but, in addition to complete switching between channels, ratios of 50/50 to 20/80 are desired. True splitting of the continuous wave power provides the greatest flexibility in operation, however, solutions that achieve average power splitting by time division of the full continuous wave beam power are acceptable provided the switching between channels occurs at a rate of at least 500 Hz. As the quality of the transmitted beam is of great importance, acceptable solutions should not degrade the beam quality of the input beam (as measured by M2) by more than 5%.

 

The solution must be capable of handling a minimum of 300 kW of continuous wave input power at a wavelength of 1.0 micron. As a goal, the beam splitter should have a 98% transmission efficiency (95% is the minimum acceptable). As the technology is intended for eventual deployment aboard Navy vessels, the solution should be fundamentally rugged and require no manned intervention (e.g., periodic calibration, alignment, tuning, etc.) during operation. Note that the Navy does not intend to furnish tactical or otherwise representative laser hardware for this effort. The proposed solution should therefore include the means for test and demonstration on surrogate hardware, provided as part of the solution. To verify power handling, demonstrations using scaled hardware, analysis, and comparison to proven component technologies are acceptable. A prototype (hardware and software) of the technology will be delivered to NSWC Dahlgren Division at the conclusion of Phase II.

 

Work produced in Phase II may become classified. Note: The prospective contractor(s) must be U.S. owned and operated with no foreign influence as defined by 32 U.S.C. § 2004.20 et seq., National Industrial Security Program Executive Agent and Operating Manual, unless acceptable mitigating procedures can and have been implemented and approved by the Defense Counterintelligence and Security Agency (DCSA) formerly Defense Security Service (DSS). The selected contractor must be able to acquire and maintain a secret level facility and Personnel Security Clearances. This will allow contractor personnel to perform on advanced phases of this project as set forth by DCSA and NAVSEA in order to gain access to classified information pertaining to the national defense of the United States and its allies; this will be an inherent requirement. The selected company will be required to safeguard classified material during the advanced phases of this contract IAW the National Industrial Security Program Operating Manual (NISPOM), which can be found at Title 32, Part 2004.20 of the Code of Federal Regulations. Reference: National Industrial Security Program Executive Agent and Operating Manual (NISP), 32 U.S.C. § 2004.20 et seq. (1993). https://www.ecfr.gov/current/title-32/subtitle-B/chapter-XX/part-2004

 

PHASE I: Develop a concept for an HEL beam splitter that meets the objectives stated in the Description. Demonstrate the feasibility of the concept in meeting the Navy’s need by any combination of analysis, modelling, and simulation. Analyze and predict the splitter performance, including the ability of the splitter to handle the input power required. Include in the proposed concept a means to test the technology. The Phase I Option, if exercised, will include the initial design specifications and capabilities description to build a prototype solution in Phase II.

 

PHASE II: Develop and deliver a prototype HEL beam splitter based on the concept, analysis, preliminary design, and specifications resulting from Phase I. Demonstration of the beam splitter technology shall be accomplished through test of a prototype in a laboratory or controlled outdoor environment utilizing surrogate lasers. At the conclusion of Phase II, prototype hardware and software shall be delivered to NSWC Dahlgren along with complete test data, installation and operation instructions, and any auxiliary software and special hardware necessary to operate the prototype.

 

It is probable that the work under this effort will be classified under Phase II (see Description section for details).

 

PHASE III DUAL USE APPLICATIONS: Support the Navy in transitioning the technology for Government use. Refine specific hardware, software, and operating instructions for specific Navy HEL weapons. Establish hardware and software configuration baselines, produce support documentation, production processes, and assist the Government in the integration of the beam splitter technology into existing and future HEL weapon systems.

 

The technology resulting from this effort is anticipated to have broad military application. In addition, there are scientific uses, specifically in high energy physics. Machining, food packaging, and solar energy are a few industries that may benefit from this technology.

 

REFERENCES:

O’Rourke, Ronald, “Naval Shipboard Lasers: Background and Issues for Congress.” Congressional Research Service, 21 December 2022. https://crsreports.congress.gov/product/pdf/R/R44175
Sayler, Kelley M., et al., “Department of Defense Directed Energy Weapons: Background and Issues for Congress.” Congressional Research Service, 13 September, 2022. https://crsreports.congress.gov/product/pdf/R/R46925

 

KEYWORDS: Laser System; High Energy Laser; Beam Director; Laser Weapon Systems; Optical Splitter; Beam Splitter