The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A novel method for real time velocity measurement is proposed. All-fiber laser measurement system is built by an erbium-doped fiber amplifier (EDFA). The measuring principle is based on laser self-mixing speckle, modulations of laser output caused by the optical feedback from an outer moving object. The generation of speckle signal is theoretically analyzed and experimentally obtained. A Labview programme...