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We describe a chip-to-chip interconnect solution that will enable 40-Tb/s bandwidth per apparatus and 10-Tb/s bandwidth per LSI in 2020. By using an interposer which can increase wiring density, we aim to increase the parallel number of data, relax the data rate, and integrate optical transceivers in the package. Doing so both enhances bandwidth and reduces power consumption. By analyzing the optical...
We performed THz pulse generation and detection beyond 4 THz by using a 1.04-μm Yb-doped fiber laser with a pulse duration of 480 fs. Owing to higher-order nonlinear processes in LiNbO3 crystals, THz pulses can be emitted with a bandwidth extending beyond the excitation pulse limitation. Emitted THz pulses are detected by using a stable sampling pulse that is temporally compressed by an optical fiber.
We propose novel optical node architecture based on the Architecture on Demand concept with sophisticated spectrum and core allocation in Multi-Core Fiber Elastic Optical Networks. More than 85% of flexible spectrum selective switches can be reduced by replacing fixed-grid MUXs/DEMUXs.
Flat wideband chaos has been experimentally demonstrated using low-cost components, VCSEL and a semiconductor optical amplifier in fibre ring resonator. The bandwidth is about 3 times greater than that achieved without the fibre ring resonator.
We demonstrate a rectangular optical filter based on stimulated Brillouin scattering with bandwidth from 50 MHz to 4 GHz. The passband ripple is ∼1 dB by nonlinearity management of the pump lines and using fibre with a single Brillouin peak.
We demonstrate that fiber capacity can be substantially increased by utilizing grouped optical path routing in a traffic growth scenario. The developed algorithm is shown to substantially mitigate filter pass band narrowing at ROADMs.
Progress on active and passive photonic components (high speed lasers, detectors, modulators, waveguides, optical hybrids, arrayed waveguide grating mux/demux) operating at wavelengths around 2 microns are described.
We optimize the FEC-OH of dual-carrier PM-16QAM 400Gb/s super-channel, considering the tradeoff between FEC net coding gain and performance penalties due to limited DAC/ADC bandwidth. At optimum FEC-OH (−29%), WDM transmission of 400Gb/s super-channel over 2150km LAPSCF is experimentally demonstrated.
We present a pre-amplified high-speed photoreceiver comprising a uni-traveling carrier photodiode monolithically integrated with a semiconductor optical amplifier. The SOA-UTC exhibits 3-dB bandwidth of 95 GHz, NF(8 dB) and 95 A/W responsivity corresponding to record gain-bandwidth product of 6.1 THz.
We confirm the widest parametric processing bandwidth of a dispersion stable polarisation maintaining (PM) highly nonlinear fibre (HNLF) among PM-HNLFs. A wavelength conversion and a quasi-phase-matched FOPA with gain of 19 dB have 1-dB bandwidth of 40 nm.
Performance of Spectral Amplitude Coding — Optical Code Division Multiple Access (SACOCDMA) based fiber vibration sensor multiplexing using Multi-Service (MS) code has been investigated. The aim of the setup was to implement a multipoint fiber vibration sensing with less complexity, efficient performance against multiple access interference (MAI) and phase induced intensity noise (PIIN) which degrade...
Deeply-etched distributed Bragg reflectors are demonstrated experimentally on silicon with mirror bandwidth that is larger than 170 nm. The reflector is realized by two layers of silicon 1-μm thick separated by a 1.95-μm air gap. Etching depth of 80 μm was obtained with side-wall angle better than 0.05 degree and scalloping peak-to-peak roughness of 15 nm. An optical filter was formed by two reflectors...
The Second Generation Digital Receiver (DRX) is the new digitisation platform for the Australian Square Kilometre Array Pathfinder (ASKAP). The DRX is the result of the ASKAP Design Enhancement (ADE) project which was undertaken to improve the manufacturability of the prototype ASKAP hardware. The DRX is a 16 port optically fed direct sampled digitiser operating between 700MHz and 1800MHz. It processes...
This paper presents a techno-economic comparison between classical passive optical networking (PON) and innovative convergent radio and fibre architectures, based on intermediate aggregation at the remote base station (RBS) of both, fixed and mobile subscribers. By aggregating users at an active remote node (ARN) co-located at the RBS, which offers high-speed switching and statistical-multiplexing...
Optical datacommunication links are under active consideration at rates beyond 40 Gb/s, especially at 100 Gb/s. The development of solutions that are compatible with constraints such as low-bandwidth optical sources requires advanced modulation formats. This talk will concentrate on hybrid schemes, for example combining conventional PAM modulation with an orthogonal channel taken from a CAP system...
This paper describes the theory, design, applications and performance of a new Reconfigurable Add-drop Multiplexer (ROADM) with flexible bandwidth allocation. The device can address several wavelengths at the input to four output fibers, according to the holograms stored in a SLM (Spatial Light Modulator), where all the outputs are equalized in power. All combinations of the input wavelengths are...
This paper describes a CMOS interface circuit for silicon photonics. 20-Gb/s operation of an optical receiver front-end circuit is demonstrated using an optical signal applied to the optical front-end. The transimpedance amplifier (TIA) is based on an inverter with resistive and inductive feedback for low power consumption and frequency compensation. A negative capacitance generation is employed in...
We performed a two-way remote optical phase comparison on optical fiber. Two optical frequency signals were launched in opposite directions in an optical fiber and their phases were simultaneously measured at the other end. In this technique, the fiber noise is passively cancelled, and we compared two optical frequencies at the ultimate 10−21 stability level. The experiment was performed on a 47km...
Guided entropy mode Rayleigh scattering in optical fibers has been shown to have detrimental effects in optical fiber links for radio frequency transfer, optoelectronic oscillators (OEOs), and broadband analog optical fiber links. We have previously shown that GEMRS-induced noise can be suppressed via sinusoidal dithering of the laser drive current. Previously, we had hypothesized that this suppression...
1.3μm Electroabsorption Modulated DFB Lasers (EMLs) operating at 45°C are presented for higher order intensity modulation formats. The application of Pulse Amplitude Modulation (PAM) is experimentally demonstrated for PAM4/PAM8 coding at symbol rates of 28 GBd. With integrated impedance matching the low cost EML shows an increased optical modulation bandwidth of 40 GHz. NRZ eyes at 56 Gb/s have been...
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