This paper proposes a new switching architecture to be used in all optical packet switching networks. The proposed switch is derived from an original 2 × 2 two-stage multi-buffer switched delay line based optical switching node, known as an M-Quadro node. By incorporating bypass lines into the M-Quadro architecture and employing a novel switch control strategy, the optical packet switching node...

A radio frequency (RF) photonic filter is experimentally demonstrated using an optical tapped delay line (TDL) based on an optical frequency comb and a periodically poled lithium niobate (PPLN) waveguide as multiplexer. The approach is used to implement RF filters with variable bandwidth, shape, and center-frequency.

We propose request-based dynamic bandwidth allocation (DBA) of gigabit passive optical network (GPON). The optical line terminal (OLT) in GPON grants bandwidth to optical network units (ONUs). ONUs report request bandwidth which depends on queue lengths of traffic containers (TCONTs) to the OLT. In the OLT, DBA of GPON supports a request-based polling order to allocate bandwidth. Our request-ba...

Current optical coherence tomography (OCT) imaging technology allows acquisition of micronscale images of tissue microstructure at rates of several frames per second over cross-sectional areas of a few square millimeters. These rates and ranges are limited by the mechanical scanning mechanism of the galvonometers currently employed in optical delay lines. New developments in OCT technology requ...

This study introduces a reversible optical fulladder. Also optical NOT and NOR gates are implemented through Electro-Absorption-Modulator / Photo Detector (EAM/PD) pairs, were utilized for fulfilling reversible R gate. Then, reversible fulladder was designed based on the proposed reversible optical R gate. The operation of the suggested fulladder was simulated using Optispice and it was fou...

Internally buffered multistage interconnection network (MIN) architectures have been widely used in parallel computer systems and large switching fabrics. Migration from electrical domain to optical domain has raised the necessity of developing node architectures with optical buffers. Cascaded optical delay line (COD) emulates output buffering in a 2x2 switching element. Two versions of COD are...

This study introduces a reversible optical fulladder. Also optical NOT and NOR gates are implemented through Electro-Absorption-Modulator / Photo Detector (EAM/PD) pairs, were utilized for fulfilling reversible R gate. Then, reversible fulladder was designed based on the proposed reversible optical R gate. The operation of the suggested fulladder was simulated using Optispice and it was fou...

Conventional phased-array antennas are limited by the bandwidth and attenuation as well as mechanical rigidity of the coaxial cables employed to perform the microwave phase shift. Photonic technology offers advantages in distribution of the microwave signal including ligthweight, compact delay lines, immunity from electromagnetic interference, low rf transmission loss and possibility of optical...

 This work is based on the optical switch architecture proposed in [5][6] to handle variable-length packets such as IP datagrams. This optical switch is based on an AWG device to route packets and is equipped with a fiber delay-line stage as optical input buffer. Unfortunately, this switch would require considerable buffering capability to achieve acceptable performance. A possible solution, s...