A periodically poled lithium niobate (PPLN) waveguide-based single-pixel up-conversion infrared spectrometer was demonstrated. Sum-frequency generation between a 1.5-microm-band scanning pump laser and a 1.3-microm-band signal generated visible radiation which was detected by a silicon single-photon detector. The up-conversion spectrometer's sensitivity was two-orders-of-magnitude higher than t...

This dual-channel instrumenl uses digital computation with a m i cr o p r ocessor to m ake f r e qu e n cy-d om ai n m eas u r e m e nts in the 0-to-25.5-kHz range with bandwidths as narrow as 20 mHz, and do it hundreds of times f aster than conventional sweptJrequency analyzers. At the same time, a number of other important capabilities are obtained. HE RECENT ADVANCES in large-scale inte-I gr...

Optical spectrum analysis is the most direct and effective method for characterizing electro-optic modulation spectra. According to Rayleigh criterion, best resolution of an optical limited by point spread function analyzer (OSA) relative intensity closely spaced spectral lines. In this paper, we propose a boosted iterative deconvolution (BID) resolve intrinsic lines from measured carrier our s...

Optical spectrum analysis and polarization analysis are not generally related by conventional wisdom. In this paper, we show that the spectrum of a light beam can be obtained using a polarimeter, with a resolution and a speed that cannot be achieved with traditional spectrum analysis methods. We experimentally demonstrate a novel polarimeter-based optical spectrum analyzer (P-OSA) and show that...

The spectrum utilization is a function of time and location. Hence, at different times and locations the utilization of spectrum might be different. The TV band 52-862 MHz has been the most crucial frequency band in Pakistan that remains unoccupied most of the time. The unoccupied frequency chunks in the TV band are termed as TV White Spaces (TVWS). In this paper, energy detection technique for...

Due to the vertiginous increase of the electromagnetic emissions of the modern communication systems and to the affected population's concern, it becomes necessary a more exhaustive control of this type of contamination. There are available different measure devices that make a characterization of the received emissions, but most does not discriminate between the contributions from different sy...