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Accurate relative frequency cancellation between two independent lasers

M Kourogi1, B Widiyatmoko, K Imai

  • 1Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, and Kanagawa Academy of Science and Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, Japan.

Optics Letters
|December 12, 2007
PubMed

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Aliasing01:18

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Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...