Hybrid integrated planar waveguide detector chip based on coarse wave decomposing and multiplexing

Abstract

The invention discloses a hybrid integrated planar waveguide detector chip based on coarse wave decomposing and multiplexing, which comprises an input port region and a detector array region, wherein a waveguide region is arranged between the input port region and the detector array region of the chip; the waveguide region comprises an input waveguide, three Mach-Zehnder interferometers and four output waveguides; the input port region is positioned at the input end of the chip and comprise an input optical fiber arranged in a V-shaped groove, a groove is arranged behind the V-shaped groove and connected with the input waveguide of the waveguide region; and the output waveguides of the waveguide region are connected with the detector array region. According to the invention, a hybrid integrated technology and a plane integration technology are combined, and multi-channel single fiber transmission and miniaturization of a CWDM (Coarse Wavelength Division Multiplexing) demultiplexing device are realized.

Description

technical field [0001] The invention relates to a wavelength division multiplexing device in the field of optical communication, in particular to a hybrid integrated planar waveguide detector chip for coarse wave division multiplexing (CWDM, also known as sparse wavelength division multiplexing). Background technique [0002] The use of hybrid integration technology and planar waveguide technology to realize miniaturized active devices is one of the development trends of optical active devices. Hybrid integration technology can combine active optical components (such as semiconductor laser chips, detector chips, TIA, modulators, etc.), passive optical waveguide components (such as PLC waveguide chips, thin film filters, and diffraction gratings, etc.), electrical transmission lines, The groove and the V-groove with fixing function are integrated on the chip with a common substrate, so as to realize the miniaturization of the device. Planar waveguide technology uses function...

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Problems solved by technology

[0004] Among the multi-channel demultiplexing detector structures that have been reported, there are mainly two structures. One is to use a larger multiplexer / demultiplexer in the optical fiber communication trunk to realize multi-channel demultiplexing. The demultiplexer is separated from the active components such as detectors, and the integration has not been realized. Another structure is to mix and integrate the demultiplexing structure and active devices, but one input fiber corresponds to one detector, which has not been realized. single fiber transmission

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