随着超高速光互连、相干光通信、相干检测等技术的不断发展,对激光光源的线宽、相频噪声、可调谐性和稳定性等都提出了更为严格的要求。利用基于CMOS(Complementary Metal Oxide Semiconductor)工艺的硅光子芯片与半导体增益芯片各自的...随着超高速光互连、相干光通信、相干检测等技术的不断发展,对激光光源的线宽、相频噪声、可调谐性和稳定性等都提出了更为严格的要求。利用基于CMOS(Complementary Metal Oxide Semiconductor)工艺的硅光子芯片与半导体增益芯片各自的优势,将二者准单片集成实现结构紧凑、低功耗和高稳定性的窄线宽半导体激光器成为近年的研究热点。该结构可通过微环谐振器、环形反射镜和马赫曾德干涉仪等提供光反馈压窄线宽,并实现宽调谐范围和稳定功率输出。本文主要阐述了硅光子芯片外腔半导体激光器的最新研究进展,针对几种包含微环谐振器的结构进行了分类介绍,深入讨论了增加耦合效率和降低端面反射率等技术难题。针对未来空间光通信和光互连等应用前景,展望了该类激光器在功率提升和光子集成方面的未来发展方向。展开更多
In this paper,a spectral beam combining(SBC)structure of multi-single emitters laser diode based on a polarization full feedback(PFF)external cavity is proposed and demonstrated.The maximum combining efficiency is 75....In this paper,a spectral beam combining(SBC)structure of multi-single emitters laser diode based on a polarization full feedback(PFF)external cavity is proposed and demonstrated.The maximum combining efficiency is 75.6%,which leads to an output power of 38.48 W,a degree of polarization(DOP)of 99.42%,and electro-optical conversion efficiency of 35.63%under continuous wave operation at a current of 8 A.Compared to the conventional SBC,the output power,the combining efficiency,the electro-optical conversion efficiency,and the DOP of the PFF-SBC structure present improvements of 5.73 W,11.26 percentage points,5.3 percentage points,and 7.26 percentage points,respectively.The results show that this SBC method can achieve a high efficiency and linearly polarized laser output of SBC,thereby making the subsequent polarization beam-combining efficiency approach the limit.展开更多
文摘随着超高速光互连、相干光通信、相干检测等技术的不断发展,对激光光源的线宽、相频噪声、可调谐性和稳定性等都提出了更为严格的要求。利用基于CMOS(Complementary Metal Oxide Semiconductor)工艺的硅光子芯片与半导体增益芯片各自的优势,将二者准单片集成实现结构紧凑、低功耗和高稳定性的窄线宽半导体激光器成为近年的研究热点。该结构可通过微环谐振器、环形反射镜和马赫曾德干涉仪等提供光反馈压窄线宽,并实现宽调谐范围和稳定功率输出。本文主要阐述了硅光子芯片外腔半导体激光器的最新研究进展,针对几种包含微环谐振器的结构进行了分类介绍,深入讨论了增加耦合效率和降低端面反射率等技术难题。针对未来空间光通信和光互连等应用前景,展望了该类激光器在功率提升和光子集成方面的未来发展方向。
基金This work was supported by the Key Technology Research and Development Program of Shandong(Nos.2022CXGC020104 and 2023ZLYS03)the Key-Area Research and Development Program of Guangdong Province(No.2020B090922003).
文摘In this paper,a spectral beam combining(SBC)structure of multi-single emitters laser diode based on a polarization full feedback(PFF)external cavity is proposed and demonstrated.The maximum combining efficiency is 75.6%,which leads to an output power of 38.48 W,a degree of polarization(DOP)of 99.42%,and electro-optical conversion efficiency of 35.63%under continuous wave operation at a current of 8 A.Compared to the conventional SBC,the output power,the combining efficiency,the electro-optical conversion efficiency,and the DOP of the PFF-SBC structure present improvements of 5.73 W,11.26 percentage points,5.3 percentage points,and 7.26 percentage points,respectively.The results show that this SBC method can achieve a high efficiency and linearly polarized laser output of SBC,thereby making the subsequent polarization beam-combining efficiency approach the limit.
