Generation of Coherent and Frequency-Locked Multi-Carriers Using Cascaded Phase Modulators for 10 Tb/s Optical Transmission System

Yu, Jianjun; Dong, Ze; Zhang, Junwen; Xiao, Xin; Chien, Hung‐Chang; Chi, Nan

doi:10.1109/jlt.2011.2173460

Cited by 62 publications

(27 citation statements)

References 16 publications

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“…It has been shown in [13] that a dual-drive SOH modulator can be used to generate a flat comb with seven lines within 2 dB, whereas the data transmission results listed here still stem from a single-drive modulator. As with any modulator-based approach it is possible to achieve a higher number of lines either by cascading multiple modulators [14] or by placing the modulator(s) into a loop [6]. Lines 7 and 8 of Table 3 show the results obtained for frequency comb generation based on cascaded modulators.…”

Section: Comparison With Previous Tbit/s Experiments Using Chip-scalementioning

confidence: 99%

“…In this context, optical super-channels are promising candidates, combining a multitude of sub-channels in a wavelength-division multiplexing (WDM) scheme, while each sub-channel operates at a moderate symbol rate that complies with currently available CMOS driver circuitry. Typically the super-channels use spectrally efficient advanced modulation formats such as quadrature phase shift keying (QPSK) or 16-state quadrature amplitude modulation (QAM) in combination with advanced multiplexing schemes such as orthogonal frequency-division multiplexing (OFDM) [4][5][6] or Nyquist-WDM [7][8][9][10]. The performance of these transmission schemes depends heavily on the properties of the optical source, in particular on the number of lines, the power per line, the optical carrier-to-noise ratio (OCNR), the optical linewidth, and on the relative intensity noise (RIN).…”

Section: Introductionmentioning

confidence: 99%

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Flexible terabit/s Nyquist-WDM super-channels using a gain-switched comb source

Pfeifle¹,

Vujicic²,

Watts³

et al. 2015

Opt. Express

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Terabit/s super-channels are likely to become the standard for next-generation optical networks and optical interconnects. A particularly promising approach exploits optical frequency combs for super-channel generation. We show that injection locking of a gain-switched laser diode can be used to generate frequency combs that are particularly well suited for terabit/s super-channel transmission. This approach stands out due to its extraordinary stability and flexibility in tuning both center wavelength and line spacing. We perform a series of transmission experiments using different comb line spacings and modulation formats. Using 9 comb lines and 16QAM signaling, an aggregate line rate (net data rate) of 1.296 Tbit/s (1.109 Tbit/s) is achieved for transmission over 150 km of standard single mode fiber (SSMF) using a spectral bandwidth of 166.5 GHz, which corresponds to a (net) spectral efficiency of 7.8 bit/s/Hz (6.7 bit/s/Hz). The line rate (net data rate) can be boosted to 2.112 Tbit/s (1.867 Tbit/s) for transmission over 300 km of SSMF by using a bandwidth of 300 GHz and QPSK modulation on the weaker carriers. For the reported net data rates and spectral efficiencies, we assume a variable overhead of either 7% or 20% for forward-error correction depending on the individual sub-channel quality after fiber transmission. References and links1. P. Winzer, "Beyond 100G Ethernet," IEEE Commun. Mag. 48(7), 26-30 (2010). 2. C. R. Cole, "100-Gb/s and beyond transceiver technologies," Opt. Fiber Technol. 17(5), 472-479 (2011). 3. S. Gringeri, E. Basch, and T. Xia, "Technical considerations for supporting data rates beyond 100 Gb/s," IEEE Commun. Mag. Becker, W. Freude, and J. Leuthold, "Real-time software-defined multiformat transmitter generating 64QAM at 28 GBd," IEEE Photon. Technol. Lett. 22(21), 1601-1603 (2010

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Section: Comparison With Previous Tbit/s Experiments Using Chip-scalementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible terabit/s Nyquist-WDM super-channels using a gain-switched comb source

Pfeifle¹,

Vujicic²,

Watts³

et al. 2015

Opt. Express

View full text Add to dashboard Cite

show abstract

“…From the obtained results, we may infer that by improving the spectral quality of the generated comb lines, as well as with improvements in the DSP algorithms aiming a better subcarrier selection and reduction of interchannel interferences, longer distances and higher bit rates may be achieved. For the first target, related to the comb line generation, the cascade of phase modulators technique seem to be promising and is subject of our current research [14].…”

Section: Fiber Transmissionmentioning

confidence: 99%

Transmission of a 1.12 Tb/s superchannel over 452 km fiber

Pataca

Carvalho

Adami

et al. 2013

J. Microw. Optoelectron. Electromagn. Appl.

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“…Optical frequency locked and coherent multicarriers were studied in the past decade for their numerous applications such as reconfigurable optical pulse generator, 1 wavelength division multiplexing, [2][3][4][5] and optical signal processing. 6 Optical frequency comb (OFC) is deployed in numerous super channel systems due to its supportive property in optical transmissions supporting high data rates in long-distance systems.…”

Section: Introductionmentioning

confidence: 99%

Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps

et al. 2016

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, "Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps," Opt. Eng. 55(9), 096106 (2016), doi: 10.1117/1.OE.55.9.096106. Abstract. An architecture for flattened and broad spectrum multicarriers is presented by generating 60 comb lines from pulsed laser driven by user-defined bit stream in cascade with three modulators. The proposed scheme is a cost-effective architecture for optical line terminal (OLT) in wavelength division multiplexed passive optical network (WDM-PON) system. The optical frequency comb generator consists of a pulsed laser in cascade with a phase modulator and two Mach-Zehnder modulators driven by an RF source incorporating no phase shifter, filter, or electrical amplifier. Optical frequency comb generation is deployed in the simulation environment at OLT in WDM-PON system supports 1.2-Tbps data rate. With 10-GHz frequency spacing, each frequency tone carries data signal of 20 Gbps-based differential quadrature phase shift keying (DQPSK) in downlink transmission. We adopt DQPSK-based modulation technique in the downlink transmission because it supports 2 bits per symbol, which increases the data rate in WDM-PON system. Furthermore, DQPSK format is tolerant to different types of dispersions and has a high spectral efficiency with less complex configurations. Part of the downlink power is utilized in the uplink transmission; the uplink transmission is based on intensity modulated on-off keying. Minimum power penalties have been observed with excellent eye diagrams and other transmission performances at specified bit error rates.

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Generation of Coherent and Frequency-Locked Multi-Carriers Using Cascaded Phase Modulators for 10 Tb/s Optical Transmission System

Cited by 62 publications

References 16 publications

Flexible terabit/s Nyquist-WDM super-channels using a gain-switched comb source

Flexible terabit/s Nyquist-WDM super-channels using a gain-switched comb source

Transmission of a 1.12 Tb/s superchannel over 452 km fiber

Pulsed laser-based optical frequency comb generator for high capacity wavelength division multiplexed passive optical network supporting 1.2 Tbps

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