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- W1662708460 abstract "We introduce numerical modeling of noise performance and distortion of semiconductor lasers subject to two-tone modulation according to the National Television Standards Committee NTSC plan for the cable television (CATV) signal transport. The waveform of the laser signal is simulated over wide ranges of the modulation index and placements of the modulation channel. The power and frequency spectra of the relative intensity noise (RIN) are characterized, and the associated second-order harmonic distortion (2HD), and the second-order (IMD2) and third-order intermodulation distortions (IMD3) are calculated. The calculated data are used to predict the measures of the CATV system performance. The dynamic range of linearity of the laser is evaluated in terms of the spurious-free dynamic range SFDR. We show that under weak modulation, the low-frequency RIN is constant at −168 dB/Hz regardless the modulation frequency. Within this accepted noise level, IMD2 is 4 dBm higher than 2HD and 10 dBm higher than IMD3. When the modulation index exceeds 25%, the laser emits clipped signals associated with large values of signal distortions. Accepted values of the carrier to noise ratio and distortions correspond to lower modulation index and/or channel frequency. Copyright © 2015 John Wiley & Sons, Ltd." @default.
- W1662708460 created "2016-06-24" @default.
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- W1662708460 date "2015-05-13" @default.
- W1662708460 modified "2023-09-27" @default.
- W1662708460 title "Noise performance and nonlinear distortion of semiconductor laser under two-tone modulation for use in analog CATV systems" @default.
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- W1662708460 doi "https://doi.org/10.1002/jnm.2074" @default.
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