Waveguide core layer, mode spot converter, silicon optical device, and optical communication unit

Abstract

The invention provides a waveguide core layer, a mode spot converter, a silicon optical device and an optical communication unit. The waveguide core layer comprises a first waveguide region and a second waveguide region which are sequentially connected in a first direction; and the first waveguide region and the second waveguide region both extend in the first direction; one end of the first waveguide region, facing away from the second waveguide region, is used for being connected with a silicon optical chip, and one end of the second waveguide region, facing away from the first waveguide region, is used for being connected with an optical fiber; the size of the first waveguide region in the second direction increases from one end, facing away from the second waveguide region, to one end,close to the second waveguide region; a refractive index of the second waveguide region is reduced from one end, close to the first waveguide region, to one end, away from the first waveguide region,so that light can be converted into a large mode spot matched with the optical fiber from a small mode spot through the first waveguide region and the second waveguide region, the precise joint of the waveguide core layer and the silicon optical chip can be ensured, the channel uniformity of the silicon optical device and the optical communication unit is improved; and the waveguide core layer can be directly processed and formed without welding, so that the manufacturing cost is low.

Description

Technical field [0001] This application relates to the field of optical communication technology, and in particular to a waveguide core layer, a mode spot converter, a silicon optical device and an optical communication device. Background technique [0002] With the development of communication technology, the application of silicon optical chips in the field of optical fiber communication technology has become more and more extensive. Since the mold spot size of the silicon optical chip is small, and the mold spot size of the optical fiber is large, the direct connection between the silicon optical chip and the optical fiber cannot be realized due to the mismatch of the mold spot size. Therefore, how to realize the transceiver based on the silicon optical chip The effective coupling between modules and fiber-based transmission links has gradually become a research focus. [0003] At present, in order to ensure the accurate connection of the optical fiber and the silicon optical c...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a waveguide core layer, a mode spot converter, a silicon optical device, and an optical communication device, which solves the problem of the high cost of fusion splicing small mode optical fibers and the large optical loss and poor channel uniformity after being connected with a silicon optical chip. The problem

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