A traditional radar actively transmits pulses and receive the corresponding echoes. By computing time taken to echoes system is able detect targets estimate their ranges. However, mainly for military applications, an active has a major drawback: it can be detected by enemy since radiates electromagnetic pulses. As such, there currently high research development activity in field of passive syst...

We propose and demonstrate a new simultaneous optical radio frequency (RF) transmission scheme using phase stabilization combined with conjugate technology. The acousto-optical modulator (AOM) is used as actuator to compensate the noise introduced by fiber link, electro-optical (EOM) modulate two carrier sidebands simultaneously stabilize RF novelty that forward backward RFs are distinguished A...

Limited by the penetration depth, imaging of thick bio-tissues can be achieved only by epi-detection geometry. Applications based on forward-emitted signals or bidirectional illumination are restricted by lack of an opposite objective. A method for creating an opposite virtual objective inside thick media through phase conjugation was first proposed. Under forward illumination, the backward sca...

Focusing light through scattering media has broad applications in optical imaging, manipulation and therapy. The contrast of the focus can be quantified by peak-to-background intensity ratio (PBR). Here, we theoretically and numerically show that by using a transmission matrix inversion method to achieve focusing, within a limited field of view and under a low noise condition in transmission ma...

The results of an experimental investigation of a new geometry for producing phase conjugation by Brillouin-enhanced four-wave mixing are presented. In this geometry, the four-wave mixing medium is carbon disulfide, and the backward-going pump wave is created from the transmitted forward-going pump wave by stimulated Brillouin scattering (SBS) in glycerol. The two pump waves are hence phase con...

Drug metabolism can either lead to detoxification, bio-inactivation and/or elimination of the drug from the body. Metabolism can be broadly categorized into phases I and II. Phase I drug metabolizing enzymes (DMEs) primarily comprise of the Cytochrome (CYP) 450 family of enzymes. CYP3A4 is the most common isoform expressed in human liver and intestine accounting for ~30-60% of CYPs (Nebert & Ru...

Optical phase conjugation is demonstrated to enable simultaneous wide-band compensation of the residual dispersion and the fiber nonlinearities in dispersion-managed fiber transmission lines employing slope-compensating fibers. When the dispersion slope of transmission fibers is equalized by slope-compensating fibers, the residual dispersion and the slope of dispersion slope are compensated by ...

A wireless sensor server is developed based on a reconfigurable active smart-antenna/retrodirective array. The system can serve as both a retrodirective array transponder and a smart-antenna receiver simply by changing the frequency of the local oscillator applied to the mixers, enabling it to best utilize its hardware to suit its communication environment. When operating as a direct-conversion...

We propose--as a modification of the optical (RF) pilot scheme--a balanced phase modulation between two polarizations of the optical signal in order to generate correlated equalization enhanced phase noise (EEPN) contributions in the two polarizations. The method is applicable for n-level PSK system. The EEPN can be compensated, the carrier phase extracted and the nPSK signal regenerated by com...