2008 Conference on Lasers and Electro-Optics 2008
DOI: 10.1109/cleo.2008.4551895
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Laser RIN and linewidth requirements for direct detection optical OFDM

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Cited by 18 publications
(9 citation statements)
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“…Unfortunately, these benefits are accompanied by high-cost installations, including narrow-linewidth laser sources at the transmitters, local oscillators, 90-degree optical hybrids, and extra signal processes accounting for the phase and frequency offset estimations at the receivers. On the other hand, DD-OFDM can adopt a low-cost DFB laser with MHz-level linewidth [6], eliminates the local oscillators and optical hybrids, and needs not estimate the phase and frequency offsets, therefore making the DD-OFDM quite convenient to be implemented. Besides, a direct-detected PDM-OFDM has been demonstrated with the self-polarization diversity technique for doubling spectral efficiency (SE) and enhancing PMD tolerance [7].…”
Section: Introductionmentioning
confidence: 99%
“…Unfortunately, these benefits are accompanied by high-cost installations, including narrow-linewidth laser sources at the transmitters, local oscillators, 90-degree optical hybrids, and extra signal processes accounting for the phase and frequency offset estimations at the receivers. On the other hand, DD-OFDM can adopt a low-cost DFB laser with MHz-level linewidth [6], eliminates the local oscillators and optical hybrids, and needs not estimate the phase and frequency offsets, therefore making the DD-OFDM quite convenient to be implemented. Besides, a direct-detected PDM-OFDM has been demonstrated with the self-polarization diversity technique for doubling spectral efficiency (SE) and enhancing PMD tolerance [7].…”
Section: Introductionmentioning
confidence: 99%
“…Wavelength-division-multiplexed (WDM) OFDM systems based on IM-DD require the use of optical multicarrier sources on the transmitter side, such as a semiconductor mode-locked laser, a gain-switched externally injected distributed feedback laser or an electro-optic modulator based comb source [6]. Several papers in the literature report on the laser noise requirements of distributed feedback (DFB) lasers [7,8] and multicarrier sources [9] for guaranteeing good performance of directly detected OOFDM systems.…”
Section: Introductionmentioning
confidence: 99%
“…However, OFDM is quite susceptible to phase noise, which will cause severe inter-carrier interference (ICI) [6]. Since laser phase noise induced by laser linewidth [7,8] will be converted to intensity noise along a dispersive fiber [9], there is a trade-off between laser linewidth and fiber transmission distance, especially for the CO-OFDM system where the transmission signal and the local oscillator (LO) signal must track the phase and frequency of each other. Therefore, it is crucial to investigate the impact of laser linewidth on an OFDM system to find a cost-effective laser with appropriate linewidth.…”
Section: Introductionmentioning
confidence: 99%