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In this paper,the influence of ambient temperature on the performance of the semiconductor laser is systematically investigated in theory. We built the simulation model, and the simulation results indicated that Ambient temperature changes would affect the laser chip temperature, resulting in the laser vital parameters in simulation results.

A new scheme to generate a 60-GHz millimetre (mm) wave by tripling the frequency of the 20-GHz DSB optical mm wave is proposed. According to our analysis and numerical simulation of transmission along a fibre, this scheme can not only eliminate code form distortion, but also reduces the influence of fading effect as it transmits along the fibre. Therefore, the radio-over-fibre link based on the generated optical mm-wave signal has better performance.

This paper aims to investigate how to improve the effectiveness and quality of high-level education course practices based on novel strategy and information technologies. We observe and discuss several important properties of course practices for undergraduates of engineering disciplines such as inheritance, continuation, dependency, integration, etc. These properties, together with the several success cases in information area such as open source and crowd engineering, inspires us to innovate the way that the course practices to be performed. We propose that the course practices in high-level education should be opened, reused and shared across time, space and object. Such way is helpful to facilitate the course practices to be performed in an effective way and obtain higher quality. We have developed a software platform PracStore that enables undergraduates to browse, query, publish, reuse, and manage large scale course practice resources, interact and share their practice experiences of both success and failure.

Nowadays, the structure of the passive optical networks is evolving, to keep the network survivability, the powering of some elements in this kind of networks is a key issue. In this work we propose the recycling of the Raman pump remaining optical power at the receiver to be converted to electrical power. With a 24 dBm optical pump signal a 8 dB on/off gain over 25 km of single mode optical fiber was achieved. Also, the recycling of the pump signal generated 18.1 mW of electrical power at the receiver. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:116–119, 2012

In order to analyze the thermal characteristics of the cavity facet of a semiconductor laser, a home-built near-field scanning optical microscopy (NSOM) is employed to probe the topography of the facet. By comparing the topographic images of two samples under different DC current injections, we can find that the thermal characteristic is related to its lifetime. We show that it is possible to predict the lifetime of the semiconductor laser diode with non-destructive tests.