CN112448786A

CN112448786A - CWDM4 optical module for realizing 50G single-fiber bidirectional

Info

Publication number: CN112448786A
Application number: CN201910823922.5A
Authority: CN
Inventors: 石旨博; 徐荣; 余铽林
Original assignee: Wuhan Yongding Guangtong Technology Co ltd; Jiangsu Etern Co Ltd
Current assignee: Hangzhou Hongshan Guangtong Technology Co ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2021-03-05

Abstract

The invention discloses a CWDM4 optical module for realizing 50G single-fiber bi-direction, which comprises a double-path 25G CDR, a double-path 25G LR Driver, a double-path 25G TOSA, an optical multiplexer/demultiplexer MUX/DMUX, a double-path 25G ROSA, a CDR and a TIA module, wherein a transmitting end receives two paths of 25G NRZ electric signals through the double-path 25G CDR, the two paths of 25G NRZ electric signals are shaped and then transmitted to a double-path 25G laser for driving, then driving signals are transmitted to the double-path 25G TOSA, and the double-path 25G TOSA sends out two paths of light which are synthesized into one path of light through the optical multiplexer/demultiplexer MUX/DMUX and transmitted on a single mode optical fiber.

Description

CWDM4 optical module for realizing 50G single-fiber bidirectional

Technical Field

The invention relates to the technical field of optical communication, in particular to a CWDM4 optical module for realizing 50G single-fiber bidirectional.

Background

In the development of optical fiber communication, the development trend of optical modules is moving toward high speed and low power consumption as a whole. In order to reduce the cost of traffic transmission, when an operator considers network deployment, the optical module is required to support higher and higher rates, and buried optical fiber resources are also saved as much as possible. The emergence of the wavelength combining and splitting technology and the wavelength division module brings great improvement to the integration and utilization of optical fiber resources, the wavelength combining and splitting technology combines light with various wavelengths into one optical fiber for transmission, and the occupation of the optical fiber is greatly reduced. Meanwhile, in order to further reduce the occupation of optical fiber resources, a BIDI type module is arranged at the end of the optical module, the type of module is provided with only one port, a filter in the module is used for filtering, and the light receiving area of the emitted light is separated, so that the light in two directions is transmitted on one optical fiber. However, with the 50G rate module, since there are two paths of light, which would bring a very large space cost if two filters are used for transmitting and receiving isolation, there would be a great technical potential if there were other schemes to implement high-rate single-fiber bi-direction.

Disclosure of Invention

The invention aims to provide a CWDM4 optical module for realizing 50G single-fiber bidirectional, which solves the problems in the background technology.

In order to realize the purpose, the invention provides the following technical scheme:

a CWDM4 optical module for realizing 50G single-fiber bi-direction comprises a double-path 25G CDR, a double-path 25G LR Driver, a double-path 25G TOSA, an optical multiplexer/demultiplexer MUX/DMUX, a double-path 25G ROSA, a CDR and a TIA module, wherein a transmitting end receives two paths of 25G NRZ electric signals through the double-path 25G CDR, the two paths of 25G NRZ electric signals are shaped and then transmitted to a double-path 25G laser for driving, then driving signals are transmitted to the double-path 25G TOSA, and the double-path 25G TOSA sends out two paths of light which are synthesized by the optical multiplexer/demultiplexer MUX/DMUX to form one path of light; the wave combining light received by a receiving end from the single mode fiber is divided into two paths of light by a wave divider to a two-path 25G ROSA, the two paths of light are converted into electric signals, and then the electric signals generated by the ROSA are integrated into standard modulation electric signals after passing through TIA and CDR for transmission.

As a further scheme of the invention: the two paths of light emitted by the two paths of 25G TOSA have the wavelength of 1271nm/1291 nm.

As a still further scheme of the invention: the two paths of light emitted by the two-path 25G TOSA have the wavelength of 1311nm/1331 nm.

As a still further scheme of the invention: the light wave of the combined wave light is 1311nm/133 nm.

As a still further scheme of the invention: there are two types of CWDM4 optical modules: a 1271nm/1291nm emission +1311nm/1331nm receiver module and a 1311nm/1331nm emission +1271nm/1291nm receiver module.

As a still further scheme of the invention: when two CWDM4 optical modules are paired using a single fiber, care should be taken to distinguish between "complementary" wavelengths, i.e.: when the emitting end of one segment is 1271nm/1291nm light, the receiving end of the other segment is 1271nm/1291nm and the emitting end of the other segment is 1311nm/1331nm, so that the link can be ensured to be communicated.

Compared with the prior art, the invention has the beneficial effects that: the 50G single-fiber bidirectional optical module capable of carrying out two-way 25G transmission is designed on the basis of the existing BIDI module technical framework, so that higher-speed information can be transmitted by using lower occupied optical fiber resources.

Drawings

Fig. 1 is a schematic diagram of an overall architecture of a CWDM4 optical module for implementing a 50G single-fiber bidirectional.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1: referring to fig. 1, to achieve the above object, the present invention provides the following technical solutions:

a CWDM4 optical module for realizing 50G single-fiber bi-direction comprises a double-path 25G CDR, a double-path 25G LR Driver, a double-path 25G TOSA, an optical multiplexer/demultiplexer MUX/DMUX, a double-path 25G ROSA and a CDR + TIA. The CDR chip at the transmitting end carries out clock recovery shaping on two paths of 25G signals, then the signals are driven by a laser, a TOSA converts the modulation signals into two paths of modulation light with the wavelength of 1271nm/1291nm or 1311nm/1331nm, and the two paths of modulation light are combined by a four-path wave combiner with the wavelength of 1271nm/1291nm/1311nm/1331nm to form one path of light with mixed wavelength. Meanwhile, because only one port is provided, the receiving light comes in while transmitting, the two wavelengths of the receiving light and the two wavelengths of the transmitting light are staggered, when the wavelength of the transmitting light is 1271nm/1291nm, the light from the receiving light side should be 1311nm/1331nm, the two paths of light are divided into two 25G light beams after passing through a wave splitter, then the two 25G light beams are converted into optical signals by ROSA and TIA, and then the optical signals are integrated into a standard electric signal by a CDR of a receiving end. Thus, single-fiber bidirectional transmission is realized.

In embodiment 2, in addition to embodiment 1, when two CWDM4 optical modules are paired by using one optical fiber, attention should be paid to distinguishing "complementary" wavelengths, that is: when the emitting end of one segment is 1271nm/1291nm light, the receiving end of the other segment is 1271nm/1291nm and the emitting end of the other segment is 1311nm/1331nm, so that the link can be ensured to be communicated.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A CWDM4 optical module for realizing 50G single-fiber bi-direction comprises a double-path 25G CDR, a double-path 25G LR Driver, a double-path 25G TOSA, an optical multiplexer/demultiplexer MUX/DMUX, a double-path 25G ROSA, a CDR and a TIA module, and is characterized in that a transmitting end receives two paths of 25G NRZ electric signals through the double-path 25G CDR, the two paths of 25G NRZ electric signals are shaped and then transmitted to a double-path 25G laser for driving, then driving signals are transmitted to the double-path 25G TOSA, and the double-path 25G TOSA sends out two paths of light which are synthesized into one path of light through the optical multiplexer/demultiplexer MUX/DMUX and; the wave combining light received by a receiving end from the single mode fiber is divided into two paths of light by a wave divider to a two-path 25G ROSA, the two paths of light are converted into electric signals, and then the electric signals generated by the ROSA are integrated into standard modulation electric signals after passing through TIA and CDR for transmission.

2. The CWDM4 optical module capable of realizing 50G single-fiber bi-direction according to claim 1, wherein the two-way 25G TOSA emits two light wavelengths of 1271nm/1291 nm.

3. The CWDM4 optical module according to claim 1, wherein the two-way 25G TOSA emits two light wavelengths of 1311nm/1331 nm.

4. The CWDM4 optical module according to claim 2, wherein the combined wave light has a wavelength of 1311nm/133 nm.

5. The CWDM4 optical module according to claim 3, wherein the wavelength of the combined wave light is 1271nm/1291 nm.

6. The CWDM4 optical module for realizing 50G single fiber bi-direction as claimed in claim 1, wherein the CWDM4 optical module has two types: a 1271nm/1291nm emission +1311nm/1331nm receiver module and a 1311nm/1331nm emission +1271nm/1291nm receiver module.

7. The CWDM4 optical module according to any one of claims 1-6, wherein when two CWDM4 optical modules are paired with a single optical fiber, the wavelength of the two CWDM modules are "complementary" to each other, i.e.: when the emitting end of one segment is 1271nm/1291nm light, the receiving end of the other segment is 1271nm/1291nm and the emitting end of the other segment is 1311nm/1331nm, so that the link can be ensured to be communicated.