a light-receiving circuit for use in an electro-optic sampling oscilloscope which receives first and second optical signals resulting from polarized separation of an optical signal whose polarized state reflects the voltage of a signal to be measured, and which produces an electric signal corresponding to the relative relationship between the intensity of the first optical signal and the intensity of the second optical signal, the circuit comprising:
first and second photo-electric conversion elements which are connected in series between a first bias power supply and a second bias power supply, receive the first and second optical signals, and convert the first and second optical signals into electric signals;
an amplifier which receives an electric signal appearing in a point of connection between the first and second photo-electric conversion elements anda sort of entertainment and something new for the traveller but, at the end of the day, it attracts the vision of the travelers to different corners in the tunnel for the cameras to capture his / her face print,” Major Gen Obaid Al Hameeri, deputy director general of Dubai residency and foreign affairs, told The National.

The project is being developed in a partnership with the airline Emirates. Dubai Airport plans to install the first of these virtual walkways by the end of summer 2018 at Terminal 3 where, with other terminals following in phases until 2020. The idea came about when officials were considering how to accommodate the growing number of passengers passing through Dubai each year, with 124 million expected to pass through all Dubai airports