Wavelength division multiplexing single-fiber bidirectional data receiving and dispatching module

Abstract

The invention discloses a wavelength division multiplexing single-fiber bidirectional data receiving and dispatching module, which comprises a wavelength division multiplexing module, a laser array, alight detector array and a light circulator; the laser array is aligned and coupled with a first input end of the wavelength division multiplexing module, the light detector array is aligned and coupled with a second output end of the wavelength division multiplexing module; a first end of the light circulator is connected to a first output end of the wavelength division multiplexing module, anda third end of the light circulator is connected to a second input end of the wavelength division multiplexing module; the second end of the light circulator is used as the input / output end of the light circulator and used for connecting with an external transmission fiber; the wavelength division multiplexing module is used for multiplexing the multiple wavelength light signals emitted by the laser array and demultiplexing the multiple wavelength light signals received from the single fiber head; the light signal in the light circulator can carry out the one-way transmission along the first end, the second end and the third end in order. The wavelength division multiplexing single-fiber bidirectional data receiving and dispatching module can realize the single-fire bidirectional transmission and is applied to the high-speed fiber interconnection of a data center.

Description

technical field [0001] The invention belongs to the field of Internet data centers or supercomputers, and more specifically relates to a wavelength division multiplexing single-fiber bidirectional data transceiver module. Background technique [0002] With the rapid development of the Internet application industry, the scale of the data center has expanded rapidly. Between the servers in the data center, a large amount of high-speed data exchange is required. Traditional cables can no longer meet the needs of this high-speed interconnection. Optical fiber interconnection technology has Become a must for large data centers. [0003] In Internet data centers, the earliest optical fiber interconnection technology solution is the multi-fiber parallel transmission technology based on multimode fiber. This solution has the advantage of low cost, so it is widely used. However, there is a serious intermodal dispersion problem in multimode fiber, and multimode transmission can only ...

AI Technical Summary

Problems solved by technology

However, the optical fiber resources in the data center are very limited, further raising the demand for single-fiber bidirectional transmission, people hope to integrate the optical circulator into the optical fiber transceiver module

Existing optical circulators are all pigtailed, and fiber fusion and fiber winding are required in the optical transceiver module, which is not conducive to the miniaturization of the module

At the same time, since the optical circulator uses a Faraday rotation plate and a half-wave plate with strong wavelength correlation, the working bandwidth is generally limited to the center ±20nm range, which cannot cover the wavelength range required for 4 wavelengths CWDM transmission

Images