Optical fiber hydrophone remote all-optical transmission system and design method thereof

Abstract

The invention discloses an optical fiber hydrophone remote all-optical transmission system and a design method thereof. The optical fiber hydrophone remote all-optical transmission system comprises an optical fiber output assembly, an optical fiber hydrophone multiplexing array, a remote pump gain unit, a remote pump unit and a signal receiving demodulation assembly. The optical fiber output assembly is connected with the optical fiber hydrophone multiplexing array through an optical fiber L1, the remote pump unit is connected with the remote pump gain unit through an optical fiber L2, the optical fiber hydrophone multiplexing array is connected with the remote pump gain unit through an optical fiber L3, and the remote pump gain unit is connected with the signal receiving and demodulating assembly through an optical fiber L4. The optical fiber L1 and the optical fiber L2 are both G.654E single-mode optical fibers, and the optical fiber L3 and the optical fiber L4 are both UUL-G.652 single-mode optical fibers. The optical fiber hydrophone is applied to the field of optical fiber hydrophones, the nonlinear effect of downlink optical transmission can be reduced, the injection optical power is increased, the loss of uplink and downlink transmission links is reduced, the remote amplification gain and optical power redundancy are improved, and the phase noise of a remote transmission system is reduced.

Description

technical field [0001] The invention relates to the technical field of optical fiber hydrophones, in particular to an optical fiber hydrophone remote all-optical transmission system and a design method thereof. Background technique [0002] Interferometric fiber optic hydrophone is a new generation of underwater acoustic sensor with optical fiber as the sensing and transmission medium. It can detect ocean sound field information with high sensitivity, and realize the functions of ocean sound field environment monitoring and marine geological exploration through complex underwater acoustic signal processing. . Compared with the traditional piezoelectric detector system, the fiber optic hydrophone has the advantages of high sensitivity, strong anti-electromagnetic interference, large dynamic range, small size, light weight and good adaptability. More importantly, it can be easily assembled. Various underwater optical fiber sensor networks provide ideal technical approaches fo...

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems of limited transmission distance and degraded detection performance caused by the transmission loss and noise surge of the existing optical fiber hydrophone submarine fixed array system, the present invention provides a long-distance all-optical transmission system and design method for optical fiber hydrophones. Using large effective area and ultra-low loss optical fiber mixed medium for transmission, and using different fiber remote pumping amplification and distributed Raman amplification to achieve high gain and low noise remote optical amplification

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