LiNbO 3 結晶を用いた可視-赤外域量子もつれ光子対の生成と評価

Fangwang Zhou, Li H, Ji W

李长英, 郝志琦, 谭海蕴 +2 more

本文简介以ＬｉＮｂＯ＿３为非线性介质，利用电光振幅调制特性实现了ＬｉＮｂＯ＿３晶体混合型光学双稳态，并在不同的条件下测试了不同的光学双稳态滞后回线和调制函数曲线，首次提出“调制函数曲线平移”问题的方法。用此一性质可将偏置电压调制为零省去偏置系统，利于系统集成，为实现无偏压双稳系统指明了方向。

Chen Shu

The characterizes of gain of Er 3+ :LiNbO 3 waveguide amplifier are studied. LiNbO 3 passive waveguide devices are small signal pump light establish on a modeling of quasi two level system built specially for pump wavelength at 980nm and neglecting ESA and ASE. The numerical simulation is done for single and double pass configuration respectively.

Neil E. Sinclair, Daniel Oblak, Charles W. Thiel +2 more

We measure properties of the 795 nm $^3$H$_6$ to $^3$H$_4$ transition of a rare-earth-ion-doped waveguide, Tm$^{3+}$:Ti$^{4+}$:LiNbO$_{3}$, at temperatures as low as 800 mK. Coherence and hyperfine population lifetimes up to 117 $\mu$s and 2.5 hours, respectively, are observed. They are at least one order of magnitude greater than those measured at 3 K, and match those observed in a bulk Tm$^{3+}$:LiNbO$_{3}$ crystal under similar conditions. Furthermore, taking advantage of these properties, we prepare a 0.5 GHz-bandwidth atomic frequency comb quantum memory of finesse $>$2 on a vanishing background. Finally, we measure high Rabi frequencies and calculate a transition dipole moment of $\sim$10$^{-32}$ C$\cdot$m, which is equivalent to that of Tm$^{3+}$:LiNbO$_{3}$. Our results show the suitability of rare-earth-doped waveguides created using industry-standard Ti-indiffusion in LiNbO$_3$ for on-chip quantum applications.

達也 古田, 隆久 石橋, 琢也 平野

Chang‐Qing Xu

Quasi phase matching (QPM) LiNbO/sub 3/ based 1.5-/spl mu/m-band wavelength converters are reviewed. Potential applications of this kind of wavelength converters in future optical communication systems are investigated.