Generation of a cavity-enhanced nondegenerate narrow-band photon pair source is a potential way to realize a perfect photonic quantum interface for a hybrid quantum network. However, to ensure the high quality of the ...Generation of a cavity-enhanced nondegenerate narrow-band photon pair source is a potential way to realize a perfect photonic quantum interface for a hybrid quantum network. However, to ensure the high quality of the photon source, the pump laser for the narrow-band photon source should be generated in a special way. Here, we experimentally generate the blue 453 nm laser with a sum frequency generation process in a periodically poled lithium niobate waveguide. A 13 mW laser at 453 nm can be achieved with a low-power 880 nm laser and 935 nm laser input, and the internal conversion efficiency is 21.6% after calculation. The frequency of a 453 nm laser is stabilized by locking two pump lasers on one ultrastable optical cavity. The single pass process without employ- ing cavity enhancement can ensure a good robustness of the whole system.展开更多
区域内的低品位热源,如低温工业余热、数据中心的废热以及生活污水中的余热等未被充分利用的热能资源,具有显著的区域供热潜力,配置分布式电热泵单元可提升热源温度品位、实现低成本供热。为促进区域协同供能并降低光伏随机波动影响,该...区域内的低品位热源,如低温工业余热、数据中心的废热以及生活污水中的余热等未被充分利用的热能资源,具有显著的区域供热潜力,配置分布式电热泵单元可提升热源温度品位、实现低成本供热。为促进区域协同供能并降低光伏随机波动影响,该文考虑热泵灵活性特征,针对区域低品位热源、光伏与热电联产单元多种供能形式的协同运行与收益分配策略展开研究。首先,考虑多时段光伏预测随机误差与电热泵拟合模型误差,建立电热泵与热电联产机组基于仿射策略的日前机会约束优化模型与日内优化模型;其次,提出基于日前、日内贡献度权重系数的非对称纳什议价方法来制定各主体收益分配策略;最后,利用改进自适应交替方向乘子法(alternating direction multiplier method,ADMM)来解决区域内各主体之间的收益分配问题。算例结果表明,所提策略在实现含低品位热源区域协同优化运行的同时,有效降低了光伏与热泵拟合模型误差的影响,并提供了区域内考虑多时间尺度贡献度的合理收益分配方案。展开更多
基金supported by the National Key Research and Development Program of China(No.2017YFA0304100)the National Natural Science Foundation of China(Nos.61327901,11325419,and11474268)+2 种基金the Key Research Program of Frontier Sciences,CAS(No.QYZDY-SSW-SLH003)the National Program for Support of Topnotch Young Professionals(No.BB2470000005)the Fundamental Research Funds for the Central Universities(Nos.WK2470000026and WK2470000018)
文摘Generation of a cavity-enhanced nondegenerate narrow-band photon pair source is a potential way to realize a perfect photonic quantum interface for a hybrid quantum network. However, to ensure the high quality of the photon source, the pump laser for the narrow-band photon source should be generated in a special way. Here, we experimentally generate the blue 453 nm laser with a sum frequency generation process in a periodically poled lithium niobate waveguide. A 13 mW laser at 453 nm can be achieved with a low-power 880 nm laser and 935 nm laser input, and the internal conversion efficiency is 21.6% after calculation. The frequency of a 453 nm laser is stabilized by locking two pump lasers on one ultrastable optical cavity. The single pass process without employ- ing cavity enhancement can ensure a good robustness of the whole system.
文摘区域内的低品位热源,如低温工业余热、数据中心的废热以及生活污水中的余热等未被充分利用的热能资源,具有显著的区域供热潜力,配置分布式电热泵单元可提升热源温度品位、实现低成本供热。为促进区域协同供能并降低光伏随机波动影响,该文考虑热泵灵活性特征,针对区域低品位热源、光伏与热电联产单元多种供能形式的协同运行与收益分配策略展开研究。首先,考虑多时段光伏预测随机误差与电热泵拟合模型误差,建立电热泵与热电联产机组基于仿射策略的日前机会约束优化模型与日内优化模型;其次,提出基于日前、日内贡献度权重系数的非对称纳什议价方法来制定各主体收益分配策略;最后,利用改进自适应交替方向乘子法(alternating direction multiplier method,ADMM)来解决区域内各主体之间的收益分配问题。算例结果表明,所提策略在实现含低品位热源区域协同优化运行的同时,有效降低了光伏与热泵拟合模型误差的影响,并提供了区域内考虑多时间尺度贡献度的合理收益分配方案。
