Improved performance of acousto-optic tunable filters (aotf), which are promising for space-borne optical sensor and instrument applications, is the goal of this project. the full capability of the aotf is limited by critical deficiencies of the current technology. the phase i effort for overcoming… More

The inherent widebandwidth and parallel signal processing characteristics of the acousto-optic spectra analyzer (aosa) make it well suited to the if spectrometer application for space astronomy studies. a wideband aosa is proposed in response to the requirements given in subtopic 08.16 of the… More

The ifm is almost an ideal receiver for the interception of radar threats except that it cannot process multiple simultaneous signals. a recently proposed approach using correlator array shows good potential of resolving this major deficiency. this proposed effort is to investigate, access and… More

A narrow-band spectral filter is a critical element in high-resolution lidars for atomsperic studies. accouto-optic tunable filters (aotf) offer the advantages of large optical throughput, rapid tuning over wide spectralrange, and inherent modulation capability, and are thereforewell suited to the… More

This high-performance, rapid-scanning imaging spectrometer uses an acousto-optic tunable filter (aotf) as the wavelength tuning device. a risk-reduction effort will be conducted during phase i. the tasks include developing innovative approaches to vary the spectral bandpass of the aotf and carrying… More

Fiber optic sensors have been developed for a variety of industry monitoring and control applications. fully realization of the potential capability of the fiber optic intensity sensors, however, require innovative approaches to practical implementing methods to multiplexing the intesity sensors… More

A major deficiency of amplitude modulated (am) fiber optic sensors is the limited accuracy due to the environmentally induced loss variations of the fiber-optic transmission link. the dual wavelength technique has shown to be inadequate since the loss variations are wavelength dependent. the… More

There exists a need for an effective Identification of Friend or Foe (IFF) as part of the target acquisition function in air and ground systems. The most important constraints applied to the real time IFF system include low probability of intercept, fail-safe, safe-guarded, and almost… More

The program objective is to developand demonstrate a low cost, low probability of intercept (LPI) sensor technology for IFF of Unmanned Aerial Vehicles (UAV). Conventional approach using active microwave radars suffer from low angular resolution, high clutter, problem of electronic jamming and… More

The objective of the proposed program is to develop a widefield narrowband optical filter (WNOF) for use in laser radar receivers. The WNOF provides the necessary discrimination against strong solar bandground that limits the daytime performance of the laser radar system. The proposed approach is… More

The objective of this project is to develop, test and demonstrate the capability to identify individual soldiers through the use of cooperative and/or non-cooperative techniques. The offset will emphasize particularly the identification of friendly forces using cooperative techniques. The process… More

The acousto-optic tunable filter (AOTF) is an electronically tunable optical filter that has a large angular aperture while maintaining high spectral resolution. Combined with the ability of simultaneous polarization measurement, and the advantage of small size and weight, the AOTF is well-suited to… More

A Scene Generation Test Capability (SGTC) has been developed at the Air Force Arnold Engineering Development Center (AEDC) for testing IR Focal Plane Arrays (FPA) using the technique of Direct Write Scene Generation (DWSG). The DWSG concept is based on the use of two-axis acousto-optic deflectors… More

Unambiguous threat signal identification has become progressively more difficult due to the proliferation of high duty cycle radar signals and the attendant time overlap of transmission at the target platform. Present systems in the field employing frequency and angle- of-arrival channelization to… More

Fiber optic communication networks utilizing wavelength division multiplexing (WDM) have been shown to be the most promising for realizing enormous bandwidth (terabit) for information transport and processing. A key device in the wideband WDM netowrk is a wavelength selective crossconnect for… More

50367-98-I High Speed Acousto-Optic Tuner--Aurora Associates, 3350 Scott Boulevard, Building 20, , Santa Clara, CA 95054-3104; (408) 748-2960 Dr. I.C. Chang, Principal Investigator Dr. Phoebe Chang, Business Official DOE Grant No. DE-FG03-98ER82537 Amount: $75,000 High repetition rate carbon… More

Rapid unambiguous signal analysis of the electromagnetic spectrum by tactical ESM and ECM systems has become progressively more challenging due to the proliferation of high duty cycle radars which produce multiple simultaneous signals at the target platform. Severe problems arise when the… More

Transmission of very wideband signal transport and processing. During Phase I, a reduced scale feasibility model of a one-dimensional (1-D) WAAOD will be fabricated, tested and demonstrated. The performance goals include 50% efficiency, 5¿ input angle, 30MHz bandwidth, and 1000 spots.

The Army has a need for a compact high-speed solid state hyperspectral tuner for rapildy tuning mid-infrared lasers and optical parametric oscillatorrs operating in the 3-5 micron range. Such electronic tunable source is needed in laser radar and Lidarsystems for various applications such as… More