Agency: Department of Defense | Branch: Defense Threat Reduction Agency | Program: SBIR | Phase: Phase I | Award Amount: 99.97K | Year: 2011
High energy X-ray pulse sources used in nuclear weapons effects (NWE) tests can produce electromagnetic pulses through system generated electromagnetic pulse (SGEMP) effects. Improved diagnostics for NWE experiments is motivated by the need to accurately measure the test environment and to model the response of devices under test with reduced overall uncertainties in the presence of high energy X-ray radiation. In particular, Source Generated EMP (SGEMP) and Box Internal EMP (IEMP) experiments would greatly benefit from the development of compact, robust, non-perturbing electric and magnetic field sensors to measure the local fields induced by X-ray generated electron currents. SGEMP pulses can be as much as ten million volts per meter in strength, have rise times less than one nanosecond, and last for as much as several hundred nanoseconds. The current method of measuring electric and magnetic fields uses bulky and metallic B-dot and D-dot probes, which require an integrator to obtain the field values. At high frequencies, greater than several hundred megahertz, active integrators are required that limit the dynamic range and the low frequency response. This proposal specifically addresses the development of a photonic electric field sensor that would overcome the limitations of the D-dot electric field measurement devices. The photonic sensor optically isolates the SGEMP pulses from the measuring instrument to provide a safe and reliable measurement of high field strengths in high radiation energy environments. A compact, high speed, and omnidirectional sensor probe that does not suffer from electromagnetic field absorption and heating is the key component to an accurate SGEMP sensor. All-dielectric construction makes the proposed photonic probe technology inherently immune to EM heating effects, while highly flexible and thin optical fibers make it possible to route sensor cables through tightly confined spaces.
Agency: Department of Defense | Branch: Army | Program: SBIR | Phase: Phase I | Award Amount: 99.98K | Year: 2014
In the burgeoning field of quantum information science, the states of individual photons, or entangled photon pairs, are used for storage, processing and secure transmission of information. The single photon sources and detectors used in this field perform best in the near-infrared (750-1000 nm) wavelength range. However, for long-distance transmission over optical fiber, it is necessary to take advantage of the minimum-loss windows around 1300 nm and 1500 nm. Thus, a crucial element in a quantum optical information processing system is a quantum frequency conversion device that can convert photons between these disparate wavelength bands while preserving their quantum state. SRICO proposes to develop a plug-and-play nonlinear device for quantum frequency conversion based on periodically poled lithium niobate (PPLN) waveguide having high difference and sum conversion efficiency greater than 30% per Watt per centimeter square with at least 10 dB signal-to-noise performances. Two complimentary modules will be developed for this proposal: (1) Difference Frequency Generation (DFG) module with input wavelengths of 795 nm and 1989 nm and (2) Sum Frequency Generation (SFG) module with inputs of 1324 nm and 1989 nm. The Phase I will design robust, fully packaged SFG and DFG quantum frequency conversion modules incorporating the PPLN waveguide device, coupling optics and temperature control apparatus. The overall size of the modules will be less than 30 cubic centimeter. In the Phase I Option task, PPLN waveguide devices will be fabricated and validated in a laboratory setting to demonstrate the key characteristics of the QFC modules.
Agency: Department of Defense | Branch: Missile Defense Agency | Program: SBIR | Phase: Phase I | Award Amount: 99.99K | Year: 2011
Recent broadband analog photonic link performance improvements have renewed the interest and activity in developing microwave photonics for broadband radio frequency (RF) signal transmission and signal processing. Increased bandwidths and reduced fiber optic link insertion loss/noise figure accompanied by increased dynamic range have created real insertion opportunities of advanced fiber optic signal distribution manifolds and RF photonic signal processors into antenna-based communications, radar, navigation, and electronic warfare systems. A key photonic integrated circuit module that enables many of the tunable microwave filtering and true-time-delay (TTD) signal processing applications is a low insertion loss, variable optical delay line with fast reconfiguration time. In this proposed effort SRICO will integrate the latest advances in electro-optic technology with low-cost, commercially available components from the telecommunications industry to produce a compact, photonic true time delay unit with faster switching, lower power consumption and wider bandwidth than competing systems. This innovative approach offers 50x reduction in voltage, sub-microsecond switching speeds compared to tens or hundreds of microseconds for bulk devices.
Agency: Department of Defense | Branch: Missile Defense Agency | Program: SBIR | Phase: Phase I | Award Amount: 129.76K | Year: 2015
In Phase I, SRICO will experimentally demonstrate the concept and complete the design of a compact robust, polarization insensitive integrated optic phase modulator and polarization controller module for Phase II development. SRICO proposes to develop a phase modulator and polarization controller based on new waveguide technologies to handle high optical power and novel device geometries to achieve wide bandwidth and low drive voltage. Performance, size and cost benefits may be achieved by combining phase modulation and polarization control in a single module suitable for use in high power fiber laser beam combiners. SRICOs integrated optic concept for a monolithically integrated optical polarization controller and phase modulator in a single robust package will enable a wide-band, high power spectral and coherent beam combining solution with improved optical efficiency and reduced size, weight, power, and cost (SWAP-C). Approved for Public Release 14-MDA-8047 (14 Nov 14)
Agency: Department of Defense | Branch: Army | Program: STTR | Phase: Phase II | Award Amount: 749.98K | Year: 2014
SRICO proposes to combine metamaterial narrowband absorbers and SRICO-proprietary thin film pyroelectric thermal detectors to produce ultra low size, weight, power and cost (SWAP-C) room temperature stand-off chemical sensors. Metamaterial narrowband absorber elements are integrated into the thin film pyroelectric detector process to provide conversion of radiation to heat, which is then sensed by the pyroelectric detector. Radiation outside a narrow absorption band is reflected by the metamaterial element. In addition, the device is engineered to reflect radiation that falls outside a narrow field of view or acceptance cone angle to mitigate self-radiance effects. This spectrally and aperture selective absorption suppresses blackbody radiation and enables the room temperature pyroelectric sensor to emulate the intrinsic noise rejection of cooled semiconductor band-gap devices. An array of pyroelectric metamaterial absorber elements tuned to different wavelengths can be formed on a silicon CMOS circuit to produce a highly compact and high speed long wave infrared (LWIR) spectrometer for mobile passive stand-off chemical sensing. In Phase I, SRICO proved the concept of the proposed technology fabricating and testing single element narrowband MMPA pyroelectric elements. In Phase II, SRICO will optimize the MMPA sensor element design and demonstrate multi-element prototypes in the chemical sensing application. Compact, low cost and spectrally resolved stand-off chemical sensors that operate at room temperature will have broad applicability to a large number of important defense, industrial, medical, and environmental applications.