We experimentally demonstrate on-chip mode-selective wavelength conversions based on the degenerate four-wave mixing (FWM) nonlinear effect in a few-mode silicon waveguide. A multimode waveguide with tapered directional coupler based mode (de)multiplexers is designed and fabricated. Using signals with advanced modulation formats all-optical wavelength conversions of 102.6-Gb/s OFDM-QPSK signals...

Blocking probability has been one of the significant parameters in the design of WDM optical networks. In most of the network topologies the probability for each link to be occupied is different. There are always some links which are more likely to be used than others which can be denoted as key links. The existing routing algorithms do not take this important factor into account significantly....

Silicon integrated optics has emerged as an attractive technology for realizing passive devices because of the efficient silicon-on-insulator sSOId guiding structures and foundry compatible processing technology. However, silicon is generally perceived to be devoid of active optical properties that are needed to realize more sophisticated optical functions such as, amplification and wavelength ...

We demonstrate an error-free 160 Gb/s SOA-based optical wavelength converter. This optical wavelength converter can be controlled by a monolithically integrated optical flip-flop memory to switch 80 Gb/s data-packets alloptically. The optical wavelength converter consists of an SOA and an optical filter. Assisting by an optical bandpass filter, an effectively recovery time of 3 ps is achieved i...

We introduce a proof-of-concept, optically controlled, optical switch based on the monolithic integration of a surface-illuminated photodetector and a waveguide electroabsorption modulator. We demonstrate unconstrained wavelength conversion over the entire center telecommunication wavelength band ~C band! and optical switching up to 2.5 Gbit/s with extinction ratios exceeding 10 dB. Our approac...

We describe a new optical phase erasure characteristic of periodically poled lithium niobate (PPLN) by using cascaded second-harmonic generation and difference-frequency generation with the signal set at the quasi-phase-matching wavelength. A simple analytical expression is derived clearly explaining the operation principle. It is interesting that the optical phase erasure feature enables an al...

A real-space study of a cylindrical integrated optical microcavity by means of a photon scanning-tunneling microscope with a resolution of 50 nm reveals optical intensity distributions in great detail. Moreover, novel phenomena such as polarization conversion and conversion from copropagation to counterpropagation are observed. We present detailed maps of the optical field distribution of the w...

Optical pulses with picosecond-duration, high-repetition-rates and low timing jitter are in high demand in many applications such as high-speed optical communication, optical analog-to-digital conversion, and optical computing. By initiating active mode-locking of erbium-doped fiber lasers and utilizing the nonlinear effect inside the fiber, picosecond/subpicosecond pulses in the 1.55 μm wavele...

In this work, the propagation of 300 femtosecond optical pulses in Silicon-on Insulator waveguides has been studied by means of a pump-probe set-up. Large Cross Phase Modulation (XPM) induced red and blue shifts (9nm and 15nm, respectively) of the probe signal have been observed depending on the delay between pump (1554nm) and probe (1683nm) pulses. A numerical model taking into account Two Pho...

This paper deals with the Optical connections with FPGAs are possible. Here Flow routing method with wavelength conversion is studied, discussed, analyzed and simulated in VHDL Language. The function of the proposed circuit is to reduce the amount of corrupted flows for the first time. With the emergence of new broadband telecommunication services and constantly increasing bandwidth demand, fix...