Wavelength Stabilization of Entangled Biphotons Using Dynamic Temperature Compensation for Quantum Interference Applications

IF 4.4 Q1 OPTICS
Yuting Liu, Huibo Hong, Xiao Xiang, Runai Quan, Xinghua Li, Tao Liu, Mingtao Cao, Shougang Zhang, Ruifang Dong
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Abstract

In this paper, a dynamic temperature compensation method is presented to stabilize the wavelength of the entangled biphoton source, which is generated on spontaneous parametric down-conversion from a magnesium oxide doped periodically poled lithium niobate waveguide. Utilizing the dispersive Fourier transformation technique, the photon wavelength variation is monitored in case of conventional static temperature control, revealing a long-term wavelength drift up to 556.8 pm over a 14-h measurement period. A Hong-Ou-Mandel (HOM) interferometer is constructed to assess the impact on quantum applications, showing a decrease in visibility from 95.5% to 69.4%. To address this issue, a digital proportional-integral-differential algorithm is implemented to dynamically compensate the working temperature variation of the waveguide, thereby instantly stabilizing the wavelength to a peak-to-peak fluctuation of +138.05 pm/-127.61 pm with the standard deviation being 30.49 pm. The wavelength stability shows more than a hundredfold enhancement in terms of Allan deviation, reaching 1.67 × 10 7 $1.67 \times {{10}^{ - 7}}$ at an averaging time of 10000 s. With the dynamic control in operation, the HOM interference visibility turns to stable at 96.1% ± 0.6%. The method provides a simple and accessible solution for precisely controlling and stabilizing the wavelength of entangled biphotons, thus improving performance in various quantum information processing applications.

Abstract Image

量子干涉中使用动态温度补偿的纠缠双光子波长稳定
本文提出了一种动态温度补偿方法,用于稳定氧化镁掺杂周期性极化铌酸锂波导中自发参数下转换产生的纠缠双光子源的波长。利用色散傅立叶变换技术,在常规静态温度控制的情况下监测光子波长变化,揭示了在14小时的测量周期内波长漂移高达556.8 pm。构建了一个Hong-Ou-Mandel (HOM)干涉仪来评估对量子应用的影响,显示能见度从95.5%下降到69.4%。为了解决这一问题,采用数字比例-积分-微分算法动态补偿波导的工作温度变化,从而立即稳定波长至+138.05 pm/-127.61 pm的峰间波动,标准差为30.49 pm。波长稳定性在艾伦偏差方面提高了100倍以上,在平均10000秒的时间内达到1.67 × 10−7 $1.67 \倍{{10}^{- 7}}$。动态控制后,HOM干扰可见度稳定在96.1%±0.6%。该方法为精确控制和稳定纠缠双光子的波长提供了一种简单易行的解决方案,从而提高了各种量子信息处理应用的性能。
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