随着集成光路和全光网络技术的发展，基于环形光谐振器结构的半导体环形激光器日益受到人们的关注，成为近年来集成光学领域的研究热点之一。设计制备了一种双直波导耦合输出半导体环形激光器,并进行了相应测试。该器件环形谐振腔波导宽度3.4 μm，环形腔半径349 μm，直波导与环形腔耦合间距1.0 μm，其阈值电流为36 mA，自由光谱范围(FSR)为0.33 nm，61 mA下激射光谱的中心波长为1566.66 nm，用光纤对准直波导口，测得直波导耦合光功率输出达到40 μW。通过该器件的光功率电流特性曲线，明显观测到了半导体环形激光器的双向工作、单向双稳态工作及交替振荡工作状态，并分析了在单向双稳态工作时，激射方向和非激射方向的光谱特性。

With the development of photonic integrated circuits and all-optical networks, semiconductor ring lasers (SRL) based on the structure of ring resonator have received increasing attention and have been one of the focuses in the field of integrated optics in recent years. The design, fabrication and test of a semiconductor ring laser with two coupling bus waveguide are reported in this paper. The width of the ring resonator is 3.4 μm, the ring radius is 349 μm, the gap between the ring resonator and the bus waveguides is 1.0 μm, the threshold current of the (SRL) is 36 mA, the free spectral range FSR is 0.33 nm, and the center lasing wavelength is 1566.66 nm when injected current is 61 mA. Coupling an optical fiber to an end of the bus waveguide, the output optical power reaches to 40 μW. Semiconductor ring laser’s bidirectional operation state, unidirectional bistability operation and unstable alternating oscillation operation state are observed through the P-I characteristic plot. At last, the spectral characteristics of lasing and non-lasing are analyzed when the ring laser operates in unidirectional bistable region.