Patent ID: 9705593
Date: 2017-07-11
CPC Classifications: H04B

Claim:
1. A communications device, wherein the communications device comprises: a first acquiring unit, configured to acquire light to be converted to an electrical signal and light to be modulated from a first optical path from a terminal-station device, wherein the terminal-station device is not underwater, wherein the communications device is underwater, and wherein the light to be converted to the electrical signal facilitates performance monitoring for the underwater communications device; a first receiving unit, configured to convert the acquired light to be converted to the electrical signal to a first electrical signal; a first control unit, configured to generate a first modulating signal according to the first electrical signal and send the first modulating signal to a first loopback unit; and the first loopback unit, configured to modulate, according to the first modulating signal, the acquired light to be modulated, and to loop the modulated light back to the terminal-station device through a second optical path, wherein a transmission direction corresponding to the second optical path is opposite to a transmission direction corresponding to the first optical path, and wherein the modulated light is used for carrying a performance monitoring result with respect to the underwater communications device; wherein the first acquiring unit comprises: a first power splitting unit, a filtering unit, and a second power splitting unit; wherein the first power splitting unit is configured to split light from the first optical wherein the filtering unit is configured to filter light from the first power splitting unit; and wherein the second power splitting unit is configured to split the filtered light into the light to be converted to the electrical signal and the light to be modulated.