A5079054801- Optical Network Technologies
- Advanced Photonic Communication Systems
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Photonic Crystal and Fiber Optics
- Advanced Optical Network Technologies
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic properties of thin films
- Rheology and Fluid Dynamics Studies
- Vibration Control and Rheological Fluids
- Semiconductor Quantum Structures and Devices
- Optical Wireless Communication Technologies
- Photorefractive and Nonlinear Optics
Infinera (United States)
2019-2023
Institute of Electrical and Electronics Engineers
2022
Nanosc (Sweden)
2017-2020
Chalmers University of Technology
2017-2020
Photonics (United States)
2020
Monash University
2013-2018
Centre for Ultrahigh Bandwidth Devices for Optical Systems
2014-2015
The University of Western Australia
2014
Engineering Systems (United States)
2013
Institute of Materials Research and Engineering
2006-2007
We experimentally demonstrate fiber nonlinearity compensation in dual polarization coherent optical OFDM (DP CO-OFDM) systems using mid-span spectral inversion (MSSI). use third-order between a pump and the signal highly nonlinear (HNLF) for MSSI. Maximum launch powers at FEC threshold two 10 × 80-km 16-QAM were increased by 6.4 dB 121-Gb/s data rate 2.8 1.2 Tb/s. The experimental results are first demonstration of MSSI any system. Simulations show that these increases could support 22%...
Abstract Fiber-optical networks are a crucial telecommunication infrastructure in society. Wavelength division multiplexing allows for transmitting parallel data streams over the fiber bandwidth, and coherent detection enables use of sophisticated modulation formats electronic compensation signal impairments. Optical frequency combs can replace multiple lasers used different wavelength channels. Beyond multiplexing, it has been suggested that broadband phase coherence could simplify receiver...
We investigate the performance of a chip-enhanced wavelength selective switch (EWSS) in multipass add/drop experiments. The demonstrated EWSS device uses ring-assisted Mach-Zehnder interferometer chip as interleaver, to preprocess incoming super channel before launch into commercial switch. show that 4% guardband, quadrature-phase-shift-keying encoded Nyquist division multiplexing can successfully pass through seven nodes. further number reachable nodes with varied guardbands, showing modest...
We show that a simplified, single-photodiode per polarization heterodyne receiver is able to directly suppress signal-signal beat interference (SSBI), without the need for cancellation in digital domain. characterize performance degradation due SSBI, and strong LO can mitigate SSBI. Transmission of 400 Gb/s-class signals shown over single fiber spans up 160 km, field-deployed metropolitan area fiber. These results indicate photodiode be used receive complex optical high speed systems SSBI
We propose an optoelectronic subsystem for inline compensation of XPM-induced phase noise in long-haul optical links. Based on intensity-dependent rotation, these compensators are used to suppress XPM a span-by-span basis. Using 7-channel hybrid WDM system as test case, our simulations show that this technique is effective at suppressing dispersion managed and unmanaged links various transmission distances.
We experimentally investigate a wavelength-division multiplexing (WDM) system with single span of 80 km standard single-mode fiber (SSMF) and phase-sensitive amplifier (PSA) as pre-amplifier. Using two channels spaced 25 GHz apart single-polarization 10-Gbaud quadrature phase-shift keying (QPSK) signal, we show quantitatively that PSA can mitigate self-phase modulation (SPM) cross-phase (XPM). With three QPSK 12.5 apart, verify XPM also determine an allowed loss increase 9.5 dB for the...
We propose an optoelectronic method for the distributed compensation of nonlinear fiber distortions affecting polarization multiplexed signals. This involves placing devices we call total-intensity-directed phase modulators at start each amplified span, in order to compensate effect nonlinearity on a span-by-span basis. Numerical simulations are used compare our proposed with well-known digital back propagation (DBP) algorithm wavelength division system consisting eight dual-polarization...
We propose and experimentally demonstrate an all-optical digital-to-analog converter based on cross-phase modulation with temporal integration. The scheme is robust for driving signal noise due to the low-pass filtering feature of integrator. proof-of-concept experiment demonstrates generation pulse-amplitude (PAM) sequences up eight levels. performance random PAM 2 4 signals different optical signal-to-noise ratios binary also investigated. scalable high-speed operation appropriate...
We demonstrate long-haul transmission using a hybrid amplifier approach combining distributed Raman amplification and lumped phase-sensitive amplification. Aside from the well-known resulting SNR improvement, is included in an effort to improve nonlinearity mitigation capability of amplifiers. When changing phase-insensitive operation link employing amplification, reach at BER = 10-3 increased 15 44 spans length 81 km while simultaneously increasing optimal launch power by 2 dB.
The authors report a technology to make distributed Bragg reflector laser with buried dielectric grating and band gap tuned region. is constructed by high coupling coefficient gratings made of SiO2 InP. the blueshifted self-aligned quantum well intermixing using itself. photoluminescence peak wavelength can be shifted ∼45meV for sample covered compared thermal shift only at annealing temperature 800°C 100s. enhanced interdiffusion caused P vacancies generated InP interfaces as proved...
Phase-sensitive optical parametric amplifiers (PSAs) can provide low-noise amplification while simultaneously mitigating nonlinear distortions caused by the Kerr effect. However, nonlinearity mitigation using PSAs is affected link parameters, and imperfect design results in residual distortions. In this paper, we use first-order perturbation theory to describe these distortions, develop a way mitigate them modified third-order Volterra equalizer (VNLE) receiver. Using numerical simulations,...
We propose and experimentally validate a blind phase recovery algorithm based on tracking low-frequency components of the noise, which we call "filtered carrier-phase estimation (F-CPE)." Tracking only allows F-CPE to reduce computational complexity by using frequency-domain equalizer simplify partitioning 16 quadrature amplitude modulation (16QAM) constellation. Further, this approach eliminates cycle slips suppressing impact amplified spontaneous emission noise estimation. The experimental...
We analyze the system performance of a novel ring resonator circuit for simultaneous Nyquist pulse shaping and (de)multiplexing, which features roll off factor 0.025 is able to dramatically reduce digital signal processing workload.
By retrofitting a commercially available WSS with an external photonic integrated circuit module, we demonstrate switching of 12-GHz sub-bands from Nyquist WDM super-channel. This allows wavelength provisioning in spectrally efficient systems only 4% guard-band.
We experimentally demonstrate, for the first time, cross-phase modulation (XPM) compensation using an optical phase modulator and low-bandwidth electronics. show that our nonlinearity compensator suppresses XPM distortion from a 10-Gb/s ON-OFF keyed (OOK) channel on continuous-wave (CW) probe signal. then replace CW tone with 28-Gbaud quadrature phase-shift (QPSK) signal OOK power can be doubled when is used. This demonstrates proof-of-concept modulators placed along fiber link.
This paper investigates the use of optoelectronic subsystems placed all way along a fiber link to provide distributed mitigation distortion caused by Kerr nonlinearity. These power-dependent phase modulation mitigate low-frequency (<; 1 GHz) components self-phase and cross-phase (XPM) experienced several wavelength channels simultaneously. Furthermore, this technique compensates nonlinear on per-span basis, so can XPM in optically routed links, unlike transmitter- or receiver-side...
We present a non-data-aided recursive digital phase recovery algorithm for mQAM optical systems, which uses priori information about the laser noise, and has very low computational complexity. Experimental validation shows extremely high robustness against cycle-slips.
Considering the nonideal response of Mach-Zehnder modulators, uniform cross QAM constellations improve upon probabilistically shaped by a factor up to 4 in uncoded symbol error rate and also offer higher achievable information rates, at same source entropy optimal electrical signal powers.
We experimentally demonstrate optical generation of a super-channel 7 × 12.5 Gbaud QPSK-modulated subcarriers at Nyquist spacing, using flat-top interleaver. The interleaver comprises two-ring-resonator-assisted Mach-Zehnder interferometer with only an 8% excess bandwidth 25-dB stopband suppression.
We quantify the maximum transmission reach for phase-insensitive amplifier (PIA) and phase-sensitive (PSA) links with different modulation formats show that increase (MTRI) when using PSAs compared to PIAs is enhanced higher-order formats. The are more susceptible smaller phase rotations from nonlinearities, efficient in mitigating these distortions. Numerical simulations were performed single- multi-span PIA PSA single multiple wavelength channels. obtain a significant enhancement MTRI both...
We report on the development of a 2×800 Gbps/wave coherent module based monolithic InP transceiver PIC and real-time 7nm DSP ASIC capable 800Gbps data transmission over record 1000km SMF-28 link using 96Gbaud, PCS-64QAM modulation format.
We experimentally investigate a phase-sensitive amplifier (PSA) link in WDM transmission scenario, focusing on nonlinearity mitigation. show that PSA effectively mitigates both cross-phase modulation (XPM) and self-phase (SPM) after over an 80-km span.
We experimentally demonstrate mid-span spectral inversion for fiber nonlinearity compensation of a 1.21-Tb/s polarization multiplexed coherent optical OFDM system. For 800-km link, the nonlinear threshold was improved by 2.8 dB. To our knowledge, this is first demonstration all-optical dual