Optical multiplexer and emitting light device

Abstract

The present invention discloses an optical multiplexer and a transmitter optical subassembly, and relates to the field of optics communications. A light-combining part is formed by using at least one light combiner that can combine two beams of light into one beam of light, and at least two levels of light-combining parts are used to constitute an optical multiplexer, so that 2 N beams of light are combined into one beam by using N level of light-combining parts, thereby reducing a package size and packaging loss, and reducing the complexity of a manufacturing process.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an optical multiplexer and an optical emitting device. Background technique [0002] At present, 40G QSFP+ (Quad Small Form-factor Pluggable Plus, four-channel small pluggable) or CFP2 (100G Form Factor Pluggable2, the second generation of gigabit pluggable), CFP4 optical modules need to transmit light from 4 lasers from PID TOSA (Photonic Integrated Device Transmitter Optical Subassembly, integrated emitting optical device) that 4 ports are collected and output from 1 port. This type of device requires small size and high density, especially for 100G CFP2 / CFP4 or 400G modules, because the light source needs to meet Lane WDM (LAN Emulation Wavelength-Division Multiplexer, LAN Emulation Wavelength-Division Multiplexer) or even DWDM (Dense Wavelength-Division Multiplexer, dense wavelength division multiplexing) standard, the wavelength interval is small, and it is especially d...

AI Technical Summary

Problems solved by technology

The disadvantages of this solution are: multiple TFFs (Thin-Film Filters, thin-film filters) are required, the optical path between each channel is unbalanced, and the output light power varies greatly; it is difficult to insert other optical components inside the OMUX, and the device length is long; multiple WDM TFF cost is high; the assembly process is complicated, and OMUX production is difficult; it is not suitable for dense wavelength division multiplexing DWDM

The disadvantage of this solution is that the use of AWG leads to large packaging loss. At the same time, AWG is difficult to manufacture, and AWG usually needs to work at a constant temperature, and temperature control is required;

[0006] It can be seen that the current optical multiplexers have disadvantages such as large packaging volume or large packaging loss, complicated manufacturing process, etc.

Images