Papers by Keyword: Optical Amplifiers

Abstract: This paper investigates the estimation of optical amplifiers based on an optoelectronic equivalent model. In order to improve the estimation performance with the limited information, a linear filter is adopted. The limited information can be treated as a switch that acts in a random manner. As the switch is open, the corresponding output is held at the previous value. The estimation of optical amplifiers taking into account the limited information can give out the better results. The results demonstrate the effectiveness and applicability.

Abstract: A double pi’n/pin a-SiC:H heterostructure with two optical connections for light triggering in different spectral regions is presented and its behavior as image and color sensor, optical amplifier and demux device is discussed. The design and the light source properties are correlated with the sensor output characteristics. Different readout techniques are used. When a low power monochromatic scanner readout is used the transducer recognizes a color pattern projected on it acting as a color and image sensor. Scan speeds up to 10⁴ lines per second are achieved without degradation in the resolution. If the photocurrent generated by different monochromatic pulsed channels is readout directly, the information is demultiplexed. Results show that it is possible to decode the information from three simultaneous color channels at bit rates per channel higher than 4000 bps. Finally, when triggered by an appropriated wavelength, it can amplify or suppress the generated photocurrent working as an optical amplifier. Electrical models are present to support the sensing methodologies.

Abstract: The paper presents a review of the results of the synthesis and characterization of Si nanoclusters and Er co-doped glasses for optical amplifiers obtained in the framework of the EC IST-SINERGIA Project.