An optical multiplexer and an optical emitting device

Abstract

The invention discloses an optical multiplexer and an optical emitting device, and relates to the field of optical communication. At least one optical combiner capable of combining two light beams into one light beam is used to form a light combining component, and at least two stages of light combining components are formed. The optical multiplexer enables 2N beams of light to be combined into one beam through N-level light combining components, which reduces the packaging volume and packaging loss, and reduces the complexity of the 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 transmitting 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 especia...

AI Technical Summary

Problems solved by technology

The disadvantages of this solution are: multiple TFFs (Thin-FilmFilter, thin-film filters) are required, the optical path between each channel is unbalanced, and the output optical power varies greatly; it is difficult to insert other optical components inside the OMUX, and the device length is long; multiple WDM The cost of TFF is high; the assembly process is complicated, and the production of OMUX 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.

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