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![]() ![]() This ticking rate (i.e., frequency) is associated with a transition between two quantum levels of the atom, where each level corresponds to a different configuration of the electrons around the nucleus. Potential commercial applications include precise synchronization of telecommunication networks for high-bandwidth communications, next-generation satellite atomic clocks for global positioning, and local clocks for very long-baseline interferometry.BO+WKB model describing the hyperpolarizability shift in an optical lattice clock with respect to atomic temperature and lattice depth. Such clocks could lead to more reliable and robust global positioning, synchronization and time-keeping in GPS-denied environments, secure data routing, communication systems that are insensitive to jamming, higher resolution coherent radar, and precision timekeeping. PHASE III: The low SWaP of the clock developed in this program should enable widespread deployment of clocks with stability comparable to primary frequency standards. The Transition Readiness Level to be reached is 5: Component and/or bread-board validation in relevant environment. PHASE II: Construct and demonstrate a prototype device validating the device performance outlined in Phase I. ![]() Read and follow Section 7.0 of the DARPA Instructions. Documentation should include all relevant information including, but not limited to: technical reports, test data, prototype designs/models, and performance goals/results. ![]() DIRECT TO PHASE II - Offerors interested in submitting a Direct to Phase II proposal in response to this topic must provide documentation to substantiate that the scientific and technical merit and feasibility described in the Phase I section of this topic has been met and describes the potential commercial applications. Phase I deliverables will include a design review including expected device performance and a report presenting the plans for Phase II. Exhibit the feasibility of the approach through a laboratory demonstration of critical components. Develop a detailed analysis of the predicted performance in a relevant environment accounting for expected environmental fluctuations such as temperature, magnetic field, and vibration fluctuations. It should have a size<1 L, weight<1 kg, and power consumption<5 W. The chosen work must be compatible with a fractional frequency stability of<10^-12 at 1 second averaging and<5x10^-15 for 1 day of averaging. PHASE I: Develop an initial design and model key elements of the proposed clock. temperature, magnetic field, vibration) in a relevant operating environment. Furthermore, the final device should be robust to environmental fluctuations (e.g. Special attention will need to be focused on reducing the power requirements of the requisite lasers, microwave sources, and local oscillators. Alternative strategies will also be considered if sufficiently justified. To achieve these goals, this SBIR will combine aspects of the two extreme clock architectures mentioned above: laser cooling (as used in QuASAR optical clocks) and microwave hyperfine transitions (as used in CSAC). The goal of this SBIR is to bridge the gap between these extremes by developing an atomic frequency standard with long term stability (<5x10^-15 at 1 day), approaching that of laboratory frequency standards such as the NIST F1 microwave Cs fountain clock but with reasonable SWaP values (S<1 L, W<1 kg, P<5 W). However these clocks drift over long timescales making them unsuitable for many applications. DARPA's Chip Scale Atomic Clock (CSAC) program has developed miniature microwave atomic clocks with extremely low SWaP values (S ~ 16 cm^3, W ~ 35 g, P ~ 125 mW) and good short-term stability (10^-10 at 1 sec). OBJECTIVE: Develop a laser-cooled microwave atomic clock with small volume (50 L, W>50 kg, P>150 W). Offerors must choose between submitting a Phase I proposal OR a Direct to Phase II proposal, and may not submit both for the same topic. DARPA will not evaluate the offeror's related Phase II proposal where it determines that the offeror has failed to demonstrate the scientific and technical merit and feasibility of the Phase I project. To be eligible, offerors are required to provide information demonstrating the scientific and technical merit and feasibility of a Phase I project. Please see section 7.0 of the DARPA instructions for additional information. This topic is eligible for the DARPA Direct to Phase II Pilot Program.
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