Four-channel coarse wavelength division multiplexing QSFP optical module

Abstract

The invention relates to the field of optical communication network modules, and provides a four-channel coarse wavelength division multiplexing QSFP optical module. The four-channel coarse wavelength division multiplexing QSFP optical module comprises a QSFP base and four transmitting optical sub-devices, and is characterized in that the four transmitting optical sub-devices are arranged on the base in parallel, and a gap is reserved between each transmitting optical sub-device and the base. The QSFP optical module further comprises a coarse wavelength division multiplexing optical assembly used for multiplexing four channels of optical signals transmitted by the four transmitting optical sub-devices, wherein the coarse wavelength division multiplexing optical assembly comprises a single optical fiber pigtail used for transmitting the multiplexed optical signals, and the single optical fiber pigtail is at least partially located in the gap. According to the four-channel coarse wavelength division multiplexing QSFP optical module, the four transmitting optical sub-devices and the coarse wavelength division multiplexing optical assembly are connected by adopting a reasonable optical fiber winding mode, and a problem that it is difficult to realize single-mode optical fiber coupling of four LDs in a narrow space is solved.

Description

technical field [0001] The invention relates to the field of optical communication network modules, in particular to a four-channel coarse wavelength division multiplexing QSFP optical module. Background technique [0002] QSFP (QSFP+, QSFP28) is currently a main packaging form of 40G / 100G optical modules. Inside, the electrical transmission adopts the parallel transmission mode of 4*10G / 4*25G to realize the transmission of 40G and 100G rates. The external optical interface, You can use the MT interface with 4 optical fibers in parallel or the LC interface with single-fiber multiplexing mode. For the single-fiber multiplexing mode, the coarse wavelength division multiplexing with CWDM wavelength is more widely used due to its economy. [0003] Since the multiplexing and demultiplexing of 4 wavelengths must be realized inside the module, the current traditional packaging technology is to integrate 4 LDs and 4 PDs into TOSA and ROSA respectively in an integrated way, and TOSA ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a four-channel coarse wavelength division multiplexing QSFP optical module, which connects the four transmitting optical sub-devices and the coarse wavelength division multiplexing optical components in a reasonable optical fiber winding mode, and solves the problem in a narrow space. Difficulty in realizing single-mode fiber coupling of 4 LDs

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