High-power dual-port output silicon-based tunable external cavity laser

Abstract

The invention relates to a high-power dual-port output silicon-based tunable external cavity laser. A hybrid integration scheme is adopted, a low-cost low-loss silicon-based microring waveguide chip is used as an external cavity medium wavelength adjustment unit, end surface coupling with an III-V group reflective semiconductor gain tube core is realized through two collimating lenses, the structure is simple, the complex process limitations of a monolithic integrated semiconductor laser are overcome, no moving part exists in the external cavity, and the reliability and the stability can be effectively improved. Through optimal design of the silicon-based microring waveguide chip structure, the nonlinear optical effect generation probability of laser in a silicon-based waveguide microring resonator is greatly reduced, and the maximum optical power which is allowed to be outputted by the laser of the structure is improved. Due to addition of a band pass filter in the external cavity collimating light path, technical requirements on the silicon-based microring waveguide chip can be effectively reduced, the coupling packaging efficiency can be improved, and low-cost batch production is facilitated.

Description

technical field [0001] The invention relates to an optical communication device, in particular to a high-power dual-port output silicon-based tunable external cavity laser, in particular to a laser gain chip of the III-V family and a silicon-based microring optical waveguide The invention discloses a realization scheme of a chip hybrid integrated dual-port output external cavity tunable laser, the tunable external cavity laser is suitable for a coherent optical communication network with a flexible wavelength grid, and belongs to the technical field of optical communication. Background technique [0002] Coherent optical communication technology has many advantages such as high receiving sensitivity bandwidth, long relay distance, good wavelength selectivity, and large communication capacity. In recent years, it has gradually become the main technology of trunk transmission network. In high-speed coherent communication systems, high-performance tunable lasers are indispensab...

AI Technical Summary

Problems solved by technology

Generally speaking, when the spectral width of the SOA gain spectrum is larger than the C Band, its long-wavelength and short-wavelength gains will also have obvious unevenness. Existing tunable lasers use a double-ring silicon-based chip directly connected to the SOA structure, which must be theoretically designed. Ensure that the free spectral range (FSR: Free Spectrum Range) of the synthetic spectrum of the silicon-based chip double-ring vernier effect is greater than the C Band, that is, the two micro-ring filters are required to have a larger free spectral range and a smaller free spectral range difference, so that As a result, the process control accuracy requirements and processing difficulty of silicon-based microring waveguide chip production will be greatly increased

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