We generate random numerical waveforms that mimic laser phase noise incorporating laser-resonance enhanced phase noise. The phase noise waveforms are employed in system simulators to estimate the resulting bit error rate penalties for differential quadrature phase shift keying signals. The results show that baudrate dependence of the bit error rate performance arises from laser-resonance phase noise. In addition, we show with supporting experimental results that the laser-resonance phase noise on the pumps in four-wave-mixing-based wavelength converters is responsible for large bit error rate floors. © 2015 Optical Society of America.

Deepa Venkitesh

Department of Electrical Engineering

Errors

Four wave mixing

Optical communication

Optical systems

Phase noise

Phase shift

Phase shift keying

Phase shifters

PUMPING (LASER)

Quadrature phase shift keying

Resonance

BAUD RATE

Bit error rate (BER) performance

DIFFERENTIAL QUADRATURE PHASE SHIFT KEYING (DQPSK)

Laser phase noise

LASER RESONANCE

SYSTEM SIMULATOR

Wave forms

WAVELENGTH CONVERTER

Bit error rate

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Numerical generation of laser-resonance phase noise for optical communication simulators

Applied Optics

We present simulations of a scheme to perform wavelength conversion of signals that eliminates phase-noise transfer from the pump to the converted signal. Nondegenerate four-wave mixing in a semiconductor optical amplifier is used to convert the signal to a new wavelength, and if an optical comb generator is used as the multiple-pump source, then the signal can be converted without incurring any phase-noise transfer from the pumps. We highlight the capabilities of this scheme by simulating the conversion of 16-QAM signals at 10 GBd and showing that errors due to phase-noise accumulation are eliminated, thus enabling conversion whose only impairment would be the total additive optical noise. © 2013 IEEE.

Fulltext

IEEE Photonics Technology Letters

Simulations of an OSNR-limited all-optical wavelength conversion scheme

We study the effect of transfer of phase noise in different fourwave mixing schemes using a coherent phase noise measurement technique.The nature of phase noise transfer from the pump to the generatedwavelengths is shown to be independent of the type of phase noise (1/ for white noise frequency components). We then propose a novel schemeusing dual correlated pumps to prevent the increase in phase noise in theconjugate wavelengths. The proposed scheme is experimentally verifiedby the all-optical wavelength conversion of a DQPSK signal at 10.7 GBaud. © 2013 Optical Society of America.

Optics Express

Dual correlated pumping scheme for phase noise preservation in all-optical wavelength conversion

2014 IEEE Photonics Conference

Narrow-linewidth tunable external cavity laser for coherent communication

Optics Communications

Simulations of the OSNR and laser linewidth limits for reliable wavelength conversion of DQPSK signals using four-wave mixing

40 Gb/s NRZ-DQPSK Data All-Optical Wavelength Conversion Using Four Wave Mixing in a Bulk SOA

Journal	Data powered by TypesetApplied Optics
Publisher	Data powered by TypesetOSA - The Optical Society
ISSN	1559128X
Impact Factor	1.230
Open Access	No
Citation Style	unsrt
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