All-Optical Chromatic Dispersion Monitoring for Phase-Modulated Signals Utilizing Cross-Phase Modulation in a Highly Nonlinear Fiber

Yang, Jeng-Yuan; Zhang, L.; Wu, Xiaoxia; Yılmaz, Ömer Faruk; Zhang, B.; Willner, Alan E.

doi:10.1109/lpt.2008.2002740

Cited by 34 publications

(13 citation statements)

References 10 publications

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“…We optically filter this sideband, measure power using a slow photodiode, allowing real-time measurement of GVD. The dynamic range of this measurement is similar to results HNLF [10], for a factor 16 higher bit rate. Figure 2c shows GVD monitoring of a 640Gb/s OOK signal.…”

Section: Experiments and Discussionsupporting

confidence: 81%

“…The measured sidetone amplitude varies by over 20dB, similar to ref [5]. As GVD affects the RF spectra of DPSK and OOK modulated signals in different ways, different features in the RF spectrum are used to monitor dispersion [5,10]. As such, it is unsurprising that a difference in measurement dynamic range exists between in figures 2b and c.…”

Section: Experiments and Discussionmentioning

confidence: 55%

“…For instance, GVD reduces the sidetone power in the RF spectrum of an intensity encoded RZ-OOK signal [5], while for a phase encoded DPSK signal new RF frequency components between the CW probe and the 640GHz clock-tone are generated [10], as illustrated in figure 2a. We use these known effects to monitor GVD on both phase and intensity modulated signals, taking real-time measurements using optical filters and slow photodetectors.…”

Section: Experiments and Discussionmentioning

confidence: 99%

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Silicon-chip-based optical performance monitoring of THz bandwidth phase and intensity modulated signals

Corcoran

Pelusi

et al. 2010

Integrated Photonics Research, Silicon and Nanophotonics and Photonics in Switching

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Abstract:We present a silicon-chip-based optical performance monitor, using an all-optical RF spectral analysis technique, capable of real-time performance monitoring both phase and intensity encoded signals. The device operates unimpeded by the effects of photo-generated free-carriers. ©2010 Optical Society of America IntroductionOptical performance monitoring, the measurement of impairments on data signals, is crucial to the operation of reconfigurable optical networks [1,2]. In ultrahigh speed serial data communications, optical performance monitoring requires tools able to characterise short, broad-bandwidth pulses to ensure optimal performance. Traditional electronic methods, limited to bandwidths of <100GHz, are unable to achieve this. All-optical techniques, particularly those harnessing ultrafast optical nonlinearities, may solve this problem. Recent interest has piqued in providing new short pulse characterization solutions with the capacity for on-chip integration [3][4][5][6][7]. Of these new techniques, cross-phase modulation based radio-frequency spectrum analysis (XPM-RFSA) has been proved as an effective tool for chip-based optical performance monitoring [8]. Silicon is particularly interesting for integration, due to the reliability and cost-effectiveness of CMOS fabrication processes. However previous XPM-RFSA performance monitoring demonstrations have been achieved chalcogenide glasses, which unlike silicon do not suffer photo-generated free-carrier effects that are well known to complicate nonlinear interactions [9]. This raises concerns about the usefulness of silicon waveguides for XPM-RFSA.In this paper we demonstrate silicon-chip-based optical performance monitoring of both phase-and intensity-modulated signals. We use XPM-RFSA to monitor residual group velocity dispersion on differential phase-shift keyed (DPSK) and return-to-zero on-off keyed (RZ-OOK) signals at serial data rates of 640Gbit/s, using techniques that lend themselves to on chip integration. We show that despite the issue of free-carriers, we are able to accurately measure radio-frequency (RF) spectra through cross-phase modulation (XPM) in a silicon nanowire waveguide, demonstrating the first silicon-chip-based XPM-RFSA. Our results demonstrate a modulation format versatile solution to terabaud optical performance monitoring, with the potential for monolithic integration on a CMOS compatible platform. 2. Background RF spectral monitoring is commonly used to analyse the temporal characteristics of signals. The RF spectrum is the power spectrum of signal intensity, i.e. for optical signals this is the squared magnitude of the Fourier transform of time varying intensity. RF spectra are usually obtained by electronic means -after measuring timevarying intensity with a photodetector, analysis is done in the electronic domain. However, the limited bandwidth (<100GHz) of photodetectors restricts the usefulness of electronics in analysis of the ultra-short optical pulses necessary for ultrahigh-speed serial communication links.

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Section: Experiments and Discussionsupporting

confidence: 81%

Section: Experiments and Discussionmentioning

confidence: 55%

Section: Experiments and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Silicon-chip-based optical performance monitoring of THz bandwidth phase and intensity modulated signals

Corcoran

Pelusi

et al. 2010

Integrated Photonics Research, Silicon and Nanophotonics and Photonics in Switching

View full text Add to dashboard Cite

show abstract

“…This leads to intensity ripples in the time domain, corresponding to new frequencies generated in the RF spectrum around the clock tone. Therefore, the RF power of the frequencies between the CW probe and the fundamental clock tone increases gradually with increasing GVD [22], [40]. Fig.…”

Section: Tpa and Free-carrier Effectsmentioning

confidence: 92%

Silicon-Chip-Based Real-Time Dispersion Monitoring for 640 Gbit/s DPSK Signals

Corcoran

Schröder

et al. 2011

J. Lightwave Technol.

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Abstract-We demonstrate silicon-chip-based instantaneous chromatic dispersion monitoring (GVD) for an ultrahigh bandwidth 640 Gbit/s differential phase-shift keying (DPSK) signal. This monitoring scheme is based on cross-phase modulation in a highly nonlinear silicon nanowire. We show that two-photon absorption and free-carrier-related effects do not compromise the GVD monitoring performance, making our scheme a reliable on-chip CMOS-compatible, all-optical, and real-time impairment monitoring approach for up to Terabit/s DPSK signals.

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“…To be exact, the method of broadcast whose structure is simple as well as giving an advantage in terms of wavelength multiplexing tends to be more popular. 3,4 The dominant implementations of all-optical broadcast are as follows: cross-gain modulation, [5][6][7][8][9][10] cross-phase modulation, [11][12][13] and four-wave mixing (FWM) for semiconductor optical amplifier (SOA) 14 and FWM for highly nonlinear fiber (HNLF). 15 Since FWM has the capability of signal processing transparently in data format 16 and can be used in both phase and intensity modulations, it attracts people's interest.…”

Section: Introductionmentioning

confidence: 99%

All-optical broadcast technology based on aluminum-doped highly nonlinear fiber

Wang

et al. 2014

Opt. Eng

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Abstract. Making use of the four-wave mixing, a realization of all-optical 1 × 6 broadcast technology based on aluminum-doped highly nonlinear fiber (AL-HNLF) is performed. In the system, a set of experiments at channel intervals of 50, 100, and 200 GHz are conducted, and clear eye diagrams as well as low error performance are obtained with an input optical signal of a continuous wave and a 10-Gb∕s return-to-zero on-off keying signal, which mostly benefits from the AL-HNLF used in this system. In detail, resulting from the high stimulated Brillouin scattering threshold of AL-HNLF, more power can be launched into the fiber. Additionally, similar performances of different channel spaces demonstrate the adjustability for this technology. With these distinguishing features, this technology might satisfy the basic expectation of utility.

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All-Optical Chromatic Dispersion Monitoring for Phase-Modulated Signals Utilizing Cross-Phase Modulation in a Highly Nonlinear Fiber

Cited by 34 publications

References 10 publications

Silicon-chip-based optical performance monitoring of THz bandwidth phase and intensity modulated signals

Silicon-chip-based optical performance monitoring of THz bandwidth phase and intensity modulated signals

Silicon-Chip-Based Real-Time Dispersion Monitoring for 640 Gbit/s DPSK Signals

All-optical broadcast technology based on aluminum-doped highly nonlinear fiber

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