Welcome to the April 2012 issue of the Photonics Society newsletter.
In this issue, we are pleased to feature a tutorial on Microwave Photonics by Prof. Jianping Yao from the University of Ottawa. Microwave Photonics brings together the worlds of microwave engineering and optics, and has advanced many applications in defense, wireless communications, imaging and network infrastructure. Prof. Yao has written an excellent tutorial on the subject. The article focuses on the generation and processing of Microwave signals. I greatly appreciate the effort Prof. Yao put into bringing this together for our readers and I hope you all enjoy the article.
Please feel free to send us your comments and suggestions to improve the Newsletter. The Associate Editors and I would love to hear your ideas about features and topics that members will find informative and enlightening in the coming months.
Editor’s Correction: In the February 2012 issue, the research highlights article on Slow light devices, Ref  should have been as follows:
 L.V. Hau, S.E. Harris, Z. Dutton, C.H. Behroozi,
“Light speed reduction to 17 metres per second
in an ultracold atomic gas,” Nature, vol. 397,