Due to the lack of optical random access memory, optical fiber delay line (FDL) is currently the only way to implement optical buffering. Feed-forward and feedback are two kinds of FDL structures in optical buffering. Both have advantages and disadvantages. In this paper, we propose a more effective hybrid FDL architecture that combines the merits of both schemes. The core of this switch is the...

the research was aimed at finding out the effects of the implementation of writing feedback techniques and students’ writing anxiety on students’ writing ablity. experimental method of 3x2 factorial design was employed in the research. there were three experimental groups of students who were taught by using teacher feedback, peer feedback and the combination of peer and teacher feedback writin...

Introduction: Coherent phase modulated RF/photonic links have been proposed [1, 2] to realise high dynamic range analogue optical links, which require the use of an optical phase-locked loop (OPLL) as a linear phase demodulator. Through feedback, the OPLL forces the output phase response of a local optical phase modulator to mirror the phase of an incoming optical signal. Since high loop gain a...

Articles you may be interested in Picosecond laser dynamics of gaincoupled and indexcoupled InGaAs/InGaAlAs quantum well distributed feedback lasers Appl. Ultralow chirping short optical pulse (16 ps) generation in gaincoupled distributed feedback semiconductor lasers Appl.

The addition of an apertured mirror before the imaging lens is proposed as a method of providing feedback in a single-axis resonant fiber scanner. Reflection at the scan extremities generates timing signals interlaced with back-scattered data, and a phase locked loop and a proportional controller then adjust the drive frequency and amplitude. The capture range and stability of the system are ex...