What question did this study set out to answer?

The aim is to analyze how laser phase noise converts to intensity noise due to chromatic dispersion in optical fibers.

Analysis of laser phase noise to intensity noise conversion by chromatic dispersion in intensity modulation and direct detection optical-fiber transmission

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Analysis reveals laser phase noise impacts intensity noise in optical fiber transmission, indicating potential transmission limits.

The aim is to analyze how laser phase noise converts to intensity noise due to chromatic dispersion in optical fibers.
Theoretical analysis of noise power spectral density due to phase-modulation-amplitude-modulation conversion.
2.4-Gb/s transmission experiments using multiple inline Er-doped fiber amplifiers to validate predictions.
Evaluation of system penalties associated with this noise in intensity modulation and direct detection.
Confirmed that phase-modulation amplitude-modulation conversion noise limits gigabit-per-second nonregenerative transmission.
Identified significant effects when laser linewidth exceeds several tens of megahertz and fiber chromatic dispersion exceeds several thousand picoseconds per nanometer.
Quantified the system penalty in IM-DD optical transmission using an external modulator.

Yamamoto et al. (1990) studied this question.

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