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We demonstrate a scheme to scale the bandwidth of a frequency comb generated by phase modulation of CW lasers using four-wave mixing in a silicon nano-waveguides, resulting in >100 comb lines spaced by 10-GHz within 5-dB bandwidth.
Microwave photonic filters utilizing optical frequency combs have been shown to achieve narrow bandwidths, high stopband attenuation as well as easy tunability of center frequency and bandwidth. The ability to achieve smooth apodization of optical frequency comb spectrum to specific spectral profiles is important to obtain high stopband attenuations. Previously, by utilizing an optical pulse shaper...
We use intensity and phase modulators to develop a 10-GHz optical frequency comb whose shape can be easily switched between extremely flat-topped (38-lines within 1-dB) and Gaussian (36-lines over 15-dB dynamic range).
We present an optical frequency comb with, to the best of our knowledge, unprecedented flatness, high stability and a large number of spectral lines, which allows for high quality pulse compression using single mode fiber.
According to the characteristics of wireless sensor networks, a novel ranging method is proposed based on measuring propagation time of acoustic signal modulated with pseudo-random number through binary phase shift keying (BPSK) and flying to and fro between two sensor nodes in a wireless sensor network. A node, that launches a ranging process and is called active node, sends modulated acoustic signal...
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