We demonstrate a novel on-chip two-mode division multiplexing circuit using tapered directional coupler-based TE 0 &TE 1 mode multiplexer and demultiplexer on the silicon-on-insulator platform.A low insertion loss (0.3 dB), crosstalk (< -16 wide bandwidth (~100 nm), large fabrication tolerance (20 nm) are measured.An onchip experiment is carried out fabricated with non return-to-zero (NRZ) on-off keying (OOK) signals at 40 Gbit/s.The experimental results show clear eye diagrams moderate...

We design and fabricate an ultrahigh coupling efficiency (CE) fully etched apodized grating coupler on the silicon-on-insulator (SOI) platform using subwavelength photonic crystals bonded aluminum mirror. Fabrication error sensitivity angle dependence are experimentally investigated. A record CE of −0.58 dB with a 3 bandwidth 71 nm low back reflection demonstrated.

We present an efficient method to design apodized grating couplers with Gaussian output profiles for coupling between standard single mode fibers and silicon chips. An coupler using fully etched photonic crystal holes on the silicon-on-insulator platform is designed, fabricated in a step of lithography etching. ultralow loss −1.74 dB (67% efficiency) 3 bandwidth 60 nm experimentally measured.

We have generated a single-wavelength data signal with capacity of 5.1 Tbit/s.The enabling techniques to generate the are optical time-division multiplexing up symbol rate 1.28 Tbaud, differential quadrature phase shift keying as format, and polarisationmultiplexing.For first time, error-free performance bit error less than 10 -9 is demonstrated for Tbit/s signal.This achieved in back-to-back configuration using direct detection receiver based on polarisation-and time-demultiplexing,...

A polarization splitter and rotator (PSR) based on a tapered directional coupler with relaxed fabrication tolerance is proposed demonstrated the silicon-on-insulator platform.The device simply constructed by parallel-coupling narrow silicon waveguide linearly wider waveguide.Compared to previously reported PSRs normal coupler, which suffer from stringent requirements accuracy of width, introduced structure wide can be used compensate errors waveguide.In addition, only single step exposure...

Abstract The prospects for using fiber optical parametric amplifiers (OPAs) in communication systems are reviewed. Phase‐insensitive (PIAs) and phase‐sensitive (PSAs) considered. Low‐penalty amplification at/or near 1 Tb/s has been achieved, both wavelength‐ time‐division multiplexed formats. High‐quality mid‐span spectral inversion demonstrated at 0.64 Tb/s, avoiding electronic dispersion compensation. All‐optical amplitude regeneration of amplitude‐modulated signals performed, while PSAs...

A novel and simple bandwidth wavelength-tunable optical bandpass filter based on silicon microrings in a Mach-Zehnder interferometer (MZI) structure is proposed demonstrated.In this design, the drop transmissions of two microring resonators are combined to provide desired tunability.A detailed analysis design device presented.The shape factor extinction ratio optimized by thermally controlling phase difference between arms MZI.Simultaneous wavelength tunability with in-band ripple control...

We propose and demonstrate a polarization splitter rotator (PSR) built on silicon-on-insulator platform. The PSR is constructed with tapered waveguide followed by 2×2 multimode interferometer can be simply fabricated in single lithography etching step. A low insertion loss (<2.5 dB minimum of 0.6 dB) crosstalk (<-12 over wide operation bandwidth (~100 nm) large fabrication tolerance (>50 are experimentally demonstrated.

Phase regeneration of differential phase-shift keying (DPSK) signals is demonstrated using a silicon waveguide as nonlinear medium for the first time.A p-i-n junction across enables decreasing losses introduced by free-carrier absorption (FCA), thus allowing phase-sensitive extinction ratios high 20 dB to be reached under continuous-wave (CW) pumping operation.Furthermore properties are investigated dynamic operation 10-Gb/s DPSK signal degraded phase noise, showing receiver sensitivity...

Fano resonances appear in quantum mechanical as well classical systems a result of the interference between two paths: one involving discrete resonance and other continuum. Compared to conventional resonance, characterized by Lorentzian spectral response, characteristic asymmetric sharp response is suggested enable photonic switches sensors with superior characteristics. While experimental demonstrations appearance have been made both plasmonic photonic-crystal structures, control these...

We have successfully demonstrated all-optical wavelength conversion of a 640-Gbit/s line-rate return-to-zero differential phase-shift keying (RZ-DPSK) signal based on low-power four wave mixing (FWM) in silicon photonic chip with switching energy only ~110 fJ/bit. The waveguide dispersion the nanowire is nano-engineered to optimize phase matching for FWM and power used processing low enough reduce nonlinear absorption from two-photon-absorption (TPA). These results demonstrate that...

The use of directly modulated lasers (DMLs) is attractive in low-power, cost-constrained short-reach optical links. However, their limited modulation bandwidth can induce waveform distortion, undermining data throughput. Traditional distortion mitigation techniques have relied mainly on the separate training transmitter-side pre-distortion and receiver-side equalization. This approach overlooks potential gains obtained by simultaneous optimization transmitter (constellation pulse shaping)...

We propose and demonstrate all-optical mode-selective wavelength conversion in a silicon waveguide. The relies on strong four-wave mixing when pump signal light are the same spatial mode, while weak is obtained between different modes due to phase mismatch. A two-mode division multiplexing circuit with tapered directional coupler based (de)multiplexers multimode waveguide designed fabricated for this application. Experimental results show clear eye-diagrams moderate power penalties of both modes.

We propose and demonstrate a novel silicon photonic integrated circuit enabling multiplexing of orthogonal modes in few-mode fiber (FMF). By selectively launching light to four vertical grating couplers, all six spatial polarization supported by the FMF are successfully excited independently.

We experimentally investigate Kerr nonlinearity mitigation of a 28-GBd polarization-multiplexed 16-QAM signal in five-channel 50-GHz spaced wavelength-division multiplexing (WDM) system. Optical phase conjugation (OPC) employing the mid-link spectral inversion technique is implemented by using dual-pump polarization-independent fiber-optic parametric amplifier and compared to digital backpropagation (DBP) compensation over up 800-km dispersion-managed link. In single-channel case, use DBP...

The dynamical properties of an InP photonic crystal nanocavity are experimentally investigated using pump-probe techniques and compared to simulations based on coupled-mode theory.Excellent agreement between experimental results is obtained when employing a rate equation model containing three time constants, that we interpret as the effects fast carrier diffusion from initially localized distribution slower surface recombination bulk recombination.The variation constants with parameters...

We report the design and fabrication of a compact multi-core fiber fan-in/fan-out using grating coupler array on SOI platform. The couplers are fully-etched, enabling whole circuit to be fabricated in single lithography etching step. Thanks apodized for introduction an aluminum reflective mirror, highest coupling efficiency -3.8 dB with 3 bandwidth 48 nm 1.5 covering C band, together crosstalk lower than -32 demonstrated.

Wavelength conversion of a 40-Gb/s return-to-zero differential phase-shift keying signal is demonstrated in highly nonlinear photonic crystal fiber (HNL-PCF) for the first time. A efficiency -20 dB pump power 23 dBm and bandwidth 31 nm, essentially limited by gain erbium-doped amplifiers, are obtained only 50-m dispersion-flattened HNL-PCF with coefficient equal to 11 W/sup -1//spl middot/km/sup -1/. This experiment demonstrates potential four-wave mixing as modulation format bit rate...

The input power tolerance of a single-pump fiber-optic parametric amplifier (FOPA) is experimentally shown to be enhanced for return-to-zero differential phase-shift keying (RZ-DPSK) modulation compared RZ on-off at 40 Gb/s. improved nonlinear exploited demonstrate amplitude regeneration distorted RZ-DPSK signal in gain-saturated FOPA. An optical signal-to-noise ratio penalty 3.5 dB after distortion reduced 0.2 the FOPA, thus clearly demonstrating regenerative nature saturated FOPAs modulation.

We report an experimental investigation of transmission and transparent wavelength conversion properties a two-level optically labeled signal using amplitude-shift-keying/differential-phase-shift-keying orthogonal modulation. Error-free 10-Gb/s payload 2.5-Gb/s label over 80-km nonzero dispersion-shifted fiber is achieved with less than 1-dB power penalty. Transparent swapping based on four-wave mixing in highly nonlinear also demonstrated, clearly validating this modulation scheme as...

GMPLS-based labeled optical burst switching (LOBS) networks are being considered as the next-generation Internet. GMPLS includes wavelength next to label and fiber (space) switching. We present a new concept of optically labeling bursts packets suitable for LOBS supported by GMPLS. It is based on angle modulation, which enables control information modulate phase or frequency carrier, while payload data transmitted via intensity modulation (IM). In particular, orthogonally modulated, with...

We report on time-of-flight experimental measurements and numerical calculations of the group-index dispersion in a photonic crystal waveguide realized silicon-on-insulator material. Experimentally group indices higher than 230 has been observed. Numerical 2D 3D time-domain simulations show excellent agreement with measured data.

A novel digital signal processing-based coherent receiver for phase-modulated radio-over-fiber (RoF) optical links is presented and demonstrated experimentally. Error-free demodulation of 50-Mbaud binary phase-shift keying (BPSK) quadrature data modulated on a 5-GHz radio-frequency (RF) carrier experimentally using the proposed receiver. Additionally, wavelength- division-multiplexing (WDM) RoF link demonstrated. 3times50 Mb/s WDM transmission BPSK RF achieved over 25 km channel spacing 12.5...

We present experimental and numerical investigations of Kerr nonlinearity compensation in a 400-km standard single-mode fiber link with distributed Raman amplification backward pumping.A dual-pump polarization-independent fiber-based optical parametric amplifier is used for mid-link spectral inversion 5 × 28-GBd polarization-multiplexed 16-QAM signals.Signal quality factor (Q-factor) improvements 1.1 dB 0.8 were obtained the cases single-channel five-channel wavelength-division multiplexing...