Offset-locking-based frequency stabilization of external cavity diode lasers for long-distance quantum communication
Offset-locking-based frequency stabilization of external cavity diode lasers for long-distance quantum communication
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DOI：
10.35848/1347-4065/ac2e67
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发表时间：
2021-11-01
影响因子：
1.5
通讯作者：
Horikiri, Tomoyuki
中科院分区：
文献类型：
--
作者：
Miyashita, Takuto;Kondo, Takeshi;Horikiri, Tomoyuki
长距离量子通信需要量子中继器。为了实现量子纠缠光子源与窄线宽量子存储器的有效耦合，我们对1514 nm和1010 nm的两个激光器进行了稳频。纠缠光子源的1514 nm泵浦激光器表现出3.6 × 10 ~（-12）（τ = 1 s）的频率稳定性。波长转换系统的1010 nm泵浦激光器表现出3.4 × 10 ~（-12）（τ = 1 s）的频率稳定性。两种激光器的稳定性比Pr：YSO量子存储器的4 MHz的频率宽度小大约两个数量级。这种稳频激光器可以实现量子存储器和量子中继器中纠缠光子源的远程耦合。
Quantum repeaters are required for long-distance quantum communication. For efficient coupling of quantum entangled photon sources with narrow-linewidth quantum memories, we performed the frequency stabilization of two lasers at 1514 and 1010 nm. The 1514 nm pump laser of the entangled photon source exhibited a frequency stability of 3.6 x 10(-12) (tau = 1 s). The 1010 nm pump laser of the wavelength conversion system exhibited a frequency stability of 3.4 x 10(-12) (tau = 1 s). The stabilities of both lasers were approximately two orders of magnitude smaller than the frequency width of 4 MHz of the Pr:YSO quantum memory. Such frequency-stabilized lasers can realize the remote coupling of a quantum memory and an entangled photon source in quantum repeaters.