Abstract: A signal identification system includes an analog adaptive channelizer having a plurality of channels. Each channel has a channel size defined by a bandwidth and a gain. The system further includes an electronic signal identification (ID) controller in signal communication with the analog adaptive channelizer. The ID controller is configured to determine a dynamic range event that modifies an energy level of an affected channel among the plurality of channels, and output a feedback signal including channel parameters based on the dynamic range event. The analog adaptive channelizer actively adjusts at least one of the bandwidth and the gain of the affected channel based on the feedback to change the channel size of the affected channel.

Abstract: A signal identification system includes an analog adaptive channelizer having a plurality of channels. Each channel has a channel size defined by a bandwidth and a gain. The system further includes an electronic signal identification (ID) controller in signal communication with the analog adaptive channelizer. The ID controller is configured to determine a dynamic range event that modifies an energy level of an affected channel among the plurality of channels, and output a feedback signal including channel parameters based on the dynamic range event. The analog adaptive channelizer actively adjusts at least one of the bandwidth and the gain of the affected channel based on the feedback to change the channel size of the affected channel.

Abstract: A signal identification system includes an analog adaptive channelizer having a plurality of channels. Each channel has a channel size defined by a bandwidth and a gain. The system further includes an electronic signal identification (ID) controller in signal communication with the analog adaptive channelizer. The ID controller is configured to determine a dynamic range event that modifies an energy level of an affected channel among the plurality of channels, and output a feedback signal including channel parameters based on the dynamic range event. The analog adaptive channelizer actively adjusts at least one of the bandwidth and the gain of the affected channel based on the feedback to change the channel size of the affected channel.

Abstract: A signal identification system includes an analog adaptive channelizer having a plurality of channels. Each channel has a channel size defined by a bandwidth and a gain. The system further includes an electronic signal identification (ID) controller in signal communication with the analog adaptive channelizer. The ID controller is configured to determine a dynamic range event that modifies an energy level of an affected channel among the plurality of channels, and output a feedback signal including channel parameters based on the dynamic range event. The analog adaptive channelizer actively adjusts at least one of the bandwidth and the gain of the affected channel based on the feedback to change the channel size of the affected channel.

Abstract: A family of cesium-germanium halide salts have utility as nonlinear optical crystals in applications including electro-optics and optical frequency conversion. These salts have the general formula CsGeCl.sub.x Br.sub.y I.sub.z, in which x, y, and z equal 0 through 3, inclusive, and where x+y+z=3. In contrast to well-known oxygen-containing materials, such as LiNbO.sub.3, these cesium-germanium halide salts exhibit optical nonlinearity with an extremely wide transparency range (without significant absorption) at wavelengths from about 0.4 .mu.m to greater than 25 .mu.m (covering the entire MWIR and LWIR regions). Based on Ge.sup.2+ ions, these halides have non-centrosymmetric perovskite structures. The halide ions form a strongly coordinating octahedral environment about the Ge.sup.2+ ions and resist migration in an electric field. The Ge2+ ions, however, are shifted slightly off center in the tetragonal phase, leading to a net electric dipole moment in each unit cell.

Abstract: A nonlinear optical material includes a noncentrosymmetric crystal of an anionic boron complex salt containing a cation and at least one organic ligand coordinated to a boron atom. The nonlinear optical crystal may consist of a compound having the formula A[BC.sub.2 ] where A is a monocation, B is boron, and C is the organic ligand, or a compound having the formula A[BC.sub.2 ].sub.2 where A is a dication, B is boron, and C is the organic ligand. The organic ligands may also be organic molecules having .alpha.-dihydroxy functionalities. Furthermore, the organic ligands may be selected from the group consisting of .alpha.-hydroxy carboxylic acids and 1,2-diols or from the group consisting of d-malic acid, d-lactic acid, d-tartaric acid, dimethyl-d-tartrate, diethyl-d-tartrate, l-malic acid, l-lactic acid, l-tartaric acid, dimethyl-l-tartrate, diethyl-l-tartrate, and ethylene glycol.

Abstract: A pulsed diode ring laser gyroscope and method of modulation are provided to greatly reduce the occurrence of frequency locking in optical gyroscopes at low rotational rates. One or two optical diodes serve as optical amplifiers for a pair of counterpropagating optical pulses circulating in an optical ring resonator. The amplifiers are driven twice each round trip (once for each pulse) using pulses much shorter than the round trip time. The short optical pulses overlap in regions of the resonator generally isolated from light scattering elements. The pulses are produced by gain switching the optical amplifiers with an electrical current pulse train having a fundamental period synchronous with the optical round trip time in the resonator cavity. With this modulation scheme, the diodes can be thought of as gates that open twice each round trip-once for each of the counterpropagating pulses. During each on time, the diodes amplify only a clockwise or counterclockwise pulse.