Heterogeneously integrated CWDM4 light emitting chip

Abstract

The invention discloses a heterogeneous integrated CWDM4 light emitting chip which integrates four MZ electro-optical modulators, four lasers and a wavelength division multiplexer, the four lasers arebonded on a substrate, a SiO2 layer is arranged on the substrate, and a Si layer is arranged on the SiO2 layer; each MZ electro-optical modulator comprises a PLC waveguide combiner, a PLC waveguide shunt and a pair of silicon waveguide phase shift arms; PLC waveguide combiners and demultiplexers of the four MZ electro-optical modulators are all arranged in the SiO2 layer, and silicon waveguide phase shift arms of the four MZ electro-optical modulators are all arranged on the Si layer. The wavelength division multiplexer is arranged in the SiO2 layer; optical signals output by the four lasersare coupled into the PLC waveguide splitters of the four MZ electro-optical modulators through end faces respectively, and the output ends of the PLC waveguide combiners of the four MZ electro-opticalmodulators are connected with the wavelength division multiplexer through PLC waveguides respectively. The heterogeneous integrated CWDM4 light emitting chip has the technical advantages of high modulation rate and low loss, and can directly realize low-loss end surface coupling with a single-mode optical fiber at a light emitting end.

Description

technical field [0001] The invention relates to the technical field of integrated optical transceiver chips, in particular to a light emitting chip, in particular to a heterogeneously integrated CWDM4 light emitting chip. Background technique [0002] Silicon-based integrated optical transceiver chips support 100G / 400G and even 800G high-speed transmission, and also support COB packaging technology, which has great advantages in terms of integration and cost. The 100G / 400G CWDM4 silicon-based integrated optical transmitter (TX) chip integrates 4 silicon-based electro-optical modulators, 1 silicon-based wavelength division multiplexer and 4 lasers with different wavelengths, and the wavelength division multiplexer can realize 4 Single-fiber transmission of optical signals with different wavelengths. At present, the integrated optical emission chip based on pure silicon waveguide has great advantages over other technical solutions in terms of single-channel modulation rate, n...

AI Technical Summary

Problems solved by technology

However, the integrated optical emission chip based on pure silicon waveguide also has a disadvantage that the optical loss is too large, resulting in too weak emitted optical signal or excessive power consumption, which is greatly limited in application.

Compared with optical devices based on silicon waveguides and their integrated chips, based on PLC waveguides (the waveguide material is SiO 2 ) optical devices and integrated chips have very low optical loss, and match the mode field of single-mode fiber, but its disadvantage is that it cannot realize high-speed electro-optic modulation

Images