Multichannel 25G LWDM optical module for 5G communication

Abstract

The invention provides a multichannel 25G LWDM optical module for 5G communication, which comprises a bottom plate, a base is arranged on the bottom plate, light-transmitting films are plated on two opposite parallel side surfaces of the base, the base is divided into a transmitting region and a receiving region; A COM (Component Object Model) port for an optical signal to enter and exit and a beam splitter for reflecting the optical signal entering the COM port from the transmitting region and transmitting the optical signal entering the COM port to enable the signal to enter the receiving region are respectively arranged on the pair of light-transmitting films between the transmitting region and the receiving region; the outer side of the base is provided with a translation steering optical element for translating and steering an optical signal passing through the beam splitter; and the light-transmitting film is correspondingly provided with a receiving port for the receiving optical signal translated and steered by the steering optical element to enter the receiving area. Compared with the prior art, the optical module combines the beam splitter and the translation steering optical element, completes the separation of information after wavelength division multiplexing and demultiplexing, reduces the loss, improves the transmission efficiency of information, reduces the assembly difficulty, and facilitates the control of the cost.

Description

technical field [0001] The invention relates to the field of optical communication devices, in particular to a multi-channel 25G LWDM optical module for 5G communication. Background technique [0002] LWDW (long wavelength division multiplexing) optical module is an important application in the field of optical communication. The existing LWDW optical module mainly has two structures: [0003] illustrate: [0004] 1. The central wavelengths of the filters in port CH01 ~ port CH12 on the optical module are 1269.23nm, 1273.54nm, 1277.89nm, 1282.26nm, 1286.66nm, 1291.10nm, 1295.56nm, 1300.05nm, 1304.58nm, 1309.14nm, 1313.73nm, 1318.35nm. Among them, CH01~CH06 are called short wave (relative to CH07~CH12), and CH07~CH12 are called long wave (relative to CH01~CH06). [0005] 2. The role of the beam splitter in the module, the BBU site is for reflecting short wave (CH01~CH06) and transmitting long wave (CH07~CH12), and the Tower site is for reflecting long wave (CH07~CH12) and ...

AI Technical Summary

Problems solved by technology

[0012] However, there are defects in the optical modules of the above two structures: For the optical module of the first structure: 1) The COM end is used as the first port, and the light is incident-coupled from here, and is transmitted by the diaphragm after reflection, transmission and free space transmission. Receiving, but the closer the port is, the greater the accumulation of insertion loss after the reflection of multiple diaphragms and the longer distance of free space transmission; 2) The COM port is the first port, which puts forward a very high angle of incidence for the finished product According to the requirements of the law of reflection, if the angle of incident light deviates in a small range, the optical path deviation will be greater the farther the port is; according to the law of reflection, the parallelism of both sides of the glass substrate also plays a key role in the transmission of the optical path, the closer After the port, the more affected it is, this poses a challenge to the cold processing technology of the glass substrate

Therefore, the reliability of this product is not high, and it is difficult to achieve mass production

3) Based on the above 2), the surface size of the diaphragm is strictly limited. Since the light is a divergent Gaussian beam, the further the port receives the light, the more serious the divergence is. If you want to ensure the integrity of the information, the surface The shape size must be controlled, so in this case, it is very unlikely to improve the surface shape of the diaphragm to reduce costs

For the optical module of the second structure: a three-port device is introduced, and there is a certain insertion loss in this structure, including the insertion loss and coupling insertion loss introduced by the structure. Based on the limitations of the existing technology, it is difficult to introduce Insertion loss further improved

When in use, the whole product has three sub-modules, limited by structural factors, the volume of the packaged product cannot be further reduced

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