Journal ArticleDOI
Impact of Laser Phase Noise on Optical Heterodyne Communication Systems
TLDR
In this article, the impact of laser phase noise on optical heterodyne communications receivers is analyzed in terms of the system signal-to-noise ratios and error rates, and the maximum permissible laser linewidth Δν is evaluated for each of these receivers and compared with previously published theoretical and experimental results.Abstract:
The impact of laser phase noise on optical heterodyne communications receivers is analyzed in terms of the system signal-to-noise ratios and error rates. An ASK receiver, three FSK receivers and a DPSK receiver are investigated. The maximum permissible laser linewidth Δν is evaluated for each of these receivers and compared with previously published theoretical and experimental results. It is shown that Δν depends on the system data rate R and on the modulation/demodulation technique chosen. For example, DPSK receivers require at least Δν ^ 0.7% of R while FSK receivers with postdetection frequency discrimination require at least Δν ^ 1.9% of R if the mark-space separation 2 fd is equal to R. At the same time, ASK receivers with envelope postdetection processing, and FSK receivers with large frequency deviation are much more tolerant to phase noise: they only require Av<9%ofR.read more
Citations
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Journal ArticleDOI
Performance of coherent optical receivers
John R. Barry,Edward A. Lee +1 more
TL;DR: In this article, the performance of coherent optical receivers under shot-noise-limited conditions is reviewed for a variety of modulation and demodulation formats, and laser phase noise is discussed, and its effect on receiver performance is analyzed.
Journal ArticleDOI
Characterizing filtered light waves corrupted by phase noise
Gerard J. Foschini,G. Vannucci +1 more
TL;DR: The authors show, for example, how to generate probability density functions of the magnitude of a filtered laser tone and how to analytically represent the characteristic function of the PDF in closed form in the small-phase-noise realm.
Journal ArticleDOI
Phase- and polarization-diversity coherent optical techniques
TL;DR: In this paper, the advantages and drawbacks of diversity receivers, and recent experimental and theoretical research results are discussed, as well as a survey of phase-and polarization-diversity coherent optical techniques.
Journal ArticleDOI
Effect of 1/f-type FM noise on semiconductor-laser linewidth residual in high-power limit
TL;DR: In this paper, a 5-MHz residual linewidth is observed in the high-power limit of 1.3 mu m DFB (distributed feedback) semiconductor lasers.
Journal ArticleDOI
High-capacity coherent lightwave systems
R.A. Linke,Alan H. Gnauck +1 more
TL;DR: The most significant obstacles to the attainment of quantum-noise limited detection at higher speeds are seen to be the requirement of uniform frequency response from electronic components and the local oscillator laser power requirement, which increases as the square of the bit rate.
References
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Journal ArticleDOI
Coherent optical fiber transmission systems
Yoshihisa Yamamoto,T. Kimura +1 more
TL;DR: In this paper, the feasibility of coherent optical fiber transmission systems was studied from the view point of device and system consideration and expected performance, in which laser coherence is utilized to carry information.
Journal ArticleDOI
Balanced phase-locked loops for optical homodyne receivers: Performance analysis, design considerations, and laser linewidth requirements
TL;DR: In this article, the authors investigated the performance of balanced phase-locked loops for optical homodyne receivers and found that the maximum permissible laser linewidth is 5.9 times 10−6 times R b, where R b (bit/s) is the system bit rate.
Journal ArticleDOI
Degradation of bit-error rate in coherent optical communications due to spectral spread of the transmitter and the local oscillator
TL;DR: In this article, a theory describing the effect of the FM noise on the bit error rate (BER) performance of various heterodyne and homodyne schemes was developed and the feasibility of the phase shift keying (PSK) scheme using semiconductor lasers was also discussed on the basis of analysis and experimentation.
Journal ArticleDOI
Receiver performance evaluation of various digital optical modulation-demodulation systems in the 0.5-10 µm wavelength region
TL;DR: In this paper, the error rate characteristics of various optical modulation-demodulation schemes are studied and a coherent optical transmission system is employed in place of the presently available amplitude-shift-keyed (ASK) baseband direct detection system.
Journal ArticleDOI
Probability of error for optical heterodyne DPSK system with quantum phase noise
TL;DR: In this article, an expression for the probability of error in an optical heterodyne DPSK system, subject to shot noise and quantum phase noise of the optical sources, is derived for the maximum linewidth of the transmit and local optical sources to satisfy a given degradation in optical receiver sensitivity.