Single-mode optical fiber bidirectional optical transceiver

Abstract

The invention provides a single-mode optical fiber bidirectional optical transceiver, which comprises a light emitting module, a light receiving module, a spot-size conversion structure and a wavelength division multiplexing module which is manufactured based on a silicon nitride technology, wherein the light emitting module is connected with an uplink optical signal transmitting end of the wavelength division multiplexing module, a downlink optical signal receiving end of the wavelength division multiplexing module is coupled and connected with the light receiving module by means of the spot-size conversion structure, an optical fiber connecting end of the wavelength division multiplexing module is connected with an optical line terminal by means of an optical fiber, the light receiving module, the wavelength division multiplexing module and the spot-size conversion structure are integrated on a same silicon substrate by adopting a silicon photonic technology, and the light emitting module is compounded and integrated on the silicon substrate. The single-mode optical fiber bidirectional optical transceiver can realize effective coupling between the wavelength division multiplexing module and the light receiving module, the light emitting module and the optical fiber, is uniform in waveguide size, can effectively reduce signal loss and reduce false reflection, and is insensitive to the ambient temperature.

Description

technical field [0001] Embodiments of the present invention belong to the technical field of optical fiber communication, and in particular relate to a single-mode optical fiber bidirectional optical transceiver. Background technique [0002] With the continuous development of optical fiber communication technology, various optical fiber transceiver devices emerge in an endless stream, which brings great convenience to the transmission of optical network signals. [0003] At present, the traditional BOSA assembly (Bi-Directional Optical Sub-Assembly, two-way optical transceiver assembly) is a photoelectric conversion device integrating transmission and reception, which can realize the bidirectional transmission function of optical signals, and is the main device in the current optical communication devices. . Bidirectional optical transceiver components usually include lasers, photoelectric modulators, photodetectors, transimpedance amplifiers (TIA), optical couplers, wavel...

AI Technical Summary

Problems solved by technology

[0005] However, due to the high refractive index of silicon, the cross-sectional size of silicon waveguides is much smaller than that of optical fibers, which is not conducive to achieving high coupling efficiency between silicon-based waveguides and optical fibers, and increases the signal loss of optical communication links; In addition, high-contrast silicon-based waveguides are prone to false reflections, and the inhomogeneity of the waveguide size caused by the manufacturing process will also cause changes in the effective refractive index of silicon-based waveguides, and environmental temperature changes will also affect the wavelength selection of silicon waveguides. some impact on performance

The problems of these silicon-based waveguides lead to the fact that the optical coupling efficiency between silicon-based passive devices and active devices is still difficult to meet the requirements of practical commercial optical interconnection applications.

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