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.
We experimentally demonstrate the high-speed free-space optical (FSO) transmission over 1 km using 20 Gbit/s advanced coherent quadrature phase-shift keying (QPSK) signals. The constellation diagram and the bit error rate (BER) are measured. The receiving sensitivity of the FSO transmission is about −23.9 dBm at the BER of 3.3×10−3.
In this paper, a novel polarization mode dispersion (PMD) monitoring method by adding auxiliary optical signal is presented. Based on four-wave mixing (FWM), the PMD can be monitored in all-optical domain by measuring the power of the idler wave. With the help of auxiliary signal, the change trend of idler wave power with PMD will be enlarged, which expands the scope of monitoring and improves the...
Recently, Φ-OTDR based on optical I/Q demodulation has been proposed as a promising solution for distributed acoustic sensing. This paper characterizes the imbalance of coherent-receiver optical front-end, and analyses its impact on phase demodulation in Φ-OTDR with coherent detection.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.