Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining
Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining
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DOI：
10.1038/lsa.2015.127
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发表时间：
2015-11-01
影响因子：
19.4
通讯作者：
Osellame, Roberto
中科院分区：
文献类型：
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作者：
Flamini, Fulvio;Magrini, Lorenzo;Osellame, Roberto
集成量子光子学在电信波段的重要性是基于与为经典通信开发的光网络基础设施接口的可能性。在此框架下，飞秒激光写入集成光子电路，这已经被评估用于在800 nm波长范围内的量子信息实验，具有很大的潜力。事实上，这些写在玻璃中的电路可以在电信波长处与输入/输出耦合光纤完美地模式匹配，这是未来量子光学网络中低损耗处理节点的关键要求。此外，对于一些应用，量子光子器件必须是动态可重构的。在这里，我们实验证明了高性能的飞秒激光写入的光子电路用于量子实验中的电信波段，我们演示了使用热移位器，这也是使用相同的飞秒激光制造，精确地调整这样的电路。国家的最先进的单光子和双光子状态的操纵被证明，与条纹活力大于95%。该工作为基于该技术平台实现可重构量子光子电路开辟了道路。
The importance of integrated quantum photonics in the telecom band is based on the possibility of interfacing with the optical network infrastructure that was developed for classical communications. In this framework, femtosecond laser-written integrated photonic circuits, which have already been assessed for use in quantum information experiments in the 800-nm wavelength range, have great potential. In fact, these circuits, being written in glass, can be perfectly mode-matched at telecom wavelength to the in/out coupling fibers, which is a key requirement for a low-loss processing node in future quantumoptical networks. In addition, for several applications, quantum photonic devices must be dynamically reconfigurable. Here, we experimentally demonstrate the high performance of femtosecond laser-written photonic circuits for use in quantum experiments in the telecom band, and we demonstrate the use of thermal shifters, which were also fabricated using the same femtosecond laser, to accurately tune such circuits. State-of-the-art manipulation of single-and two-photon states is demonstrated, with fringe visibilities greater than 95%. The results of this work open the way to the realization of reconfigurable quantum photonic circuits based on this technological platform.