Optical fibre wave conducting type optical submodule

Abstract

The invention relates to an optical fiber wave-guide optical secondary module that includes illuminator, multimode fiber, light splitter, optical fiber, and light checking device. The invention improves the permissible level of illuminator by multimode fiber that could save the extra contraposition mechanism and decrease cost and increase transmitting efficiency.

Description

technical field [0001] The invention relates to an optical sub-module, which is applied to an optical communication module in a passive optical network (PON) and a fiber-to-the-home (FTTH) network architecture, in particular to an optical fiber waveguide type optical sub-module. Background technique [0002] Bi-directional optical transceivers commonly used in passive optical network (PON) and fiber-to-the-home (FTTH) network architectures mainly have two forms: dual-frequency (Duplexer) and triple-frequency (Triplexer). Dual-frequency refers to the transmission of data (Data) and Voice (Voice) has two signal contents, while tri-band refers to the transmission of data, sound and video (Video) three signal contents. With the increasing demand for digital and analog image transmission, traditional two-way dual-frequency optical transceivers have been unable to meet the needs of the market. Demand, therefore, bi-directional tri-band optical transceivers will become the mainstre...

AI Technical Summary

Problems solved by technology

However, there is a crisis of low coupling light alignment tolerance in the three interfaces, and the light coupling problem of mode field mismatch is derived due to the different waveguide forms, so the overall light coupling efficiency will be difficult to improve

The sleeve-type optical sub-module mainly uses lenses to solve the problem of free-space optical coupling, and its optical coupling alignment tolerance is also compensated by lenses. The disadvantage is that the optical coupling efficiency is still not good, and the use of multiple lenses Also increases module cost

[0006] In the triple-frequency optical transceiver, there is only one type of sleeve-type optical sub-module, because both the light-emitting element and the light-detecting element are packaged in a sleeve-type package, which increases the cost of the module's optical active components

In addition, the volume of the sleeve-type package component is large, and it is easy to make the free space coupling distance too long in assembly, resulting in a decrease in coupling efficiency and dispersion of light transmission.

Images