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We experimentally demonstrate pulse-shaping experiments in which the individual spectral lines that are present in the output of a mode-locked laser (8.5 GHz mode spacing, centered at 1542 nm) are resolved. The shaped pulses overlap in time, and this leads to a new way to observe fluctuations of the comb-offset frequency in the time domain.
We experimentally demonstrate repetitive M-ary spectral phase pulse shaping by placing a programmable pulse shaper driven by a 10-GHz source in a closed loop. This permits generation of encoded and decoded signals in the same apparatus by forming a closed loop to circulate a part of the output back into the pulse shaper. As a result, a series of M - 1… (More)
Column chromatographic separation of the roots of cultivated-wild ginseng (Jangnoisam) led to the isolation of seven polyacetylenes (1-7). Their structures were determined by spectroscopic methods to be panaxynol (1), ginsenoyne-A (2), panaxydol (3), 10-methoxy heptadeca-1-ene-4, 6-dyne-3, 9-diol (4) (3R, 9R, 10R)-panaxytriol (5), panaxyne (6), and… (More)
One of the important parts of the infrared seeker is the counter countermeasure part. Seeking in a field of view with the existence of jammers is not simple and needs effective algorithms. In this paper, several methods of the detection in a crossed array trachers (CAT) seeker will be designed, simulated and evaluated. These methods depend on detecting the… (More)
We present flat-top microwave photonic filters through amplitude and phase shaping of optical frequency combs. Flat-topped filters with greater than 27-dB stopband loss are demonstrated using 32 taps with both positive and negative tap coefficients.
We suggest a novel technique to measure the free spectral range of a Fabry-Perot etalon (FPE). The technique utilizes a Pound-Drever-Hall method using both reflected and transmitted lights of an FPE. We improve the measurement accuracy ~2 dB by using both of the lights.