Multiplexed single-mode wavelength-to-time mapping of multimode light.
Multiplexed single-mode wavelength-to-time mapping of multimode light.
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DOI：
10.1038/ncomms14080
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发表时间：
2017-01-25
影响因子：
16.6
通讯作者：
Thomson RR
中科院分区：
文献类型：
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作者：
Chandrasekharan HK;Izdebski F;Gris-Sánchez I;Krstajić N;Walker R;Bridle HL;Dalgarno PA;MacPherson WN;Henderson RK;Birks TA;Thomson RR
当光脉冲沿着光纤传播时，不同的波长以不同的群速度传播。结果，波长信息被转换为到达时间信息，这一过程称为波长到时间映射。使用单模光纤传输线可以最清楚地观察到这种现象，其中不存在空间模式色散，但此类光纤的使用限制了可能的应用。在这里，我们证明基于锥形单模多芯光纤的光子灯笼提供了一种将多模光耦合到单光子雪崩探测器阵列的有效方法，每个探测器都有自己的时间数字转换器，用于时间相关的单光子计数。利用这一功能，我们使用具有 121 个单模芯的多芯光纤光子灯笼（与 32 × 32 探测器阵列上的 121 个探测器耦合）演示了多模光的复用单模波长到时间映射。这项工作为具有单模系统光谱性能的高效多模波长到时间映射系统铺平了道路。光子灯笼是通过将多个单模核心合并为一个多模核心而制成的。在这里，作者展示了这种类型的结构既可以执行光的多模态的波长到时间的映射，也可以将这种光耦合到单光子雪崩探测器阵列。
When an optical pulse propagates along an optical fibre, different wavelengths travel at different group velocities. As a result, wavelength information is converted into arrival-time information, a process known as wavelength-to-time mapping. This phenomenon is most cleanly observed using a single-mode fibre transmission line, where spatial mode dispersion is not present, but the use of such fibres restricts possible applications. Here we demonstrate that photonic lanterns based on tapered single-mode multicore fibres provide an efficient way to couple multimode light to an array of single-photon avalanche detectors, each of which has its own time-to-digital converter for time-correlated single-photon counting. Exploiting this capability, we demonstrate the multiplexed single-mode wavelength-to-time mapping of multimode light using a multicore fibre photonic lantern with 121 single-mode cores, coupled to 121 detectors on a 32 × 32 detector array. This work paves the way to efficient multimode wavelength-to-time mapping systems with the spectral performance of single-mode systems. Photonic lanterns are made by merging several single-mode cores into one multimode core. Here, the authors show this type of structure can both perform wavelength-to-time mapping of multimode states of light and couple such light to an array of single-photon avalanche detectors.