CROSS REFERENCE TO RELATED APPLICATIONS

This application is a national stage application of International Application No. PCT/JP2019/010734 entitled “Submarine Optical Transmission Device and Submarine Optical Communications System” filed on Mar. 15, 2019, which claims priority to Japanese Patent Application No. JP2018-056773 filed on Mar. 23, 2018, the disclosures of which are hereby incorporated by reference in their entirety.

TECHNICAL FIELD

The present invention relates to a submarine optical transmission apparatus and a submarine optical communication system

BACKGROUND ART

In a submarine optical communication system, land base stations are connected through submarine cables, and optical communication is performed between the base stations. Various submarine optical transmission apparatuses are connected to the submarine cable. An optical component for amplifying a transmitted optical signal and controlling a transmission path of the optical signal is mounted on the submarine optical transmission apparatus.

As an example of a submarine optical transmission apparatus, an optical submarine repeater having a plurality of subunits has been proposed (Patent Literature 1). In this optical submarine repeater, the subunits are arranged in a longitudinal direction of a cylindrical case. The subunit is provided with optical components, optical fibers connected to the optical components, and electric components such as a power supply and a control circuit. The subunits are connected by wiring (optical fibers and electric wiring).

CITATION LIST

Patent Literature

[Patent Literature 1] Japanese Unexamined Patent Application Publication No. 2001-320826

SUMMARY OF INVENTION

Technical Problem

Due to an increase in communication traffic, advanced and flexible signal control are required in the submarine optical transmission apparatus. To achieve this, the number of optical components and electric components mounted on the submarine optical transmission apparatus is increasing. On the other hand, in the above-described configuration of the submarine optical transmission apparatus, the number of components can be increased by increasing the number of subunits. However, a structure of the wiring connecting the subunits becomes complicated, and a wiring connecting work becomes difficult. Further, as the number of interconnections between the subunits increases, a space occupied by the interconnections increases, and thereby the number of components to be mounted is limited.

The present invention has been made in view of the above-mentioned problem, and an object of the present invention is to provide a submarine optical transmission apparatus capable of efficiently housing optical components and electric components.

Solution to Problem

An aspect of the present invention is a submarine optical transmission apparatus including: a plurality of first component housing units configured to be capable of housing either or both of an optical component and an electric component and to be stacked in a first direction; and a case configured to be capable of housing the stacked first component housing units, a longitudinal direction thereof being a second direction orthogonal to the first direction.

An aspect of the present invention is a submarine optical communication system including: a first base station and a second base station provided on land; and a submarine optical transmission apparatus connected to the first base station and the second base station through submarine cables, in which the submarine optical transmission apparatus includes: a plurality of first component housing units configured to be capable of housing either or both of an optical component and an electric component and to be stacked in a first direction; and a case configured to be capable of housing the stacked first component housing units, a longitudinal direction thereof being a second direction orthogonal to the first direction.

Advantageous Effects of Invention

According to the present invention, it is possible to provide a submarine optical transmission apparatus capable of efficiently housing optical components and electric components.

