Interference from Two-Photon Sources in Silica-on-Silicon Circuits at Telecom Wavelength

• 来源期刊: 中国物理快报（英文版）
• 关键词: @@
• 年，卷（期）: 2017,（3）
• 页码范围: 64-67
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/34/3/034211

摘要

The integrated photonic chip is a promising way to realize future quantum technology.Here we demonstrate a two-photon interference in the standard telecommunication band on a silica-on-silicon integrated photonic chip.Two identical photons in the 1.55μm band,which are indistinguishable in spatial,frequency and polarization,are generated by type-Ⅰ collinear spontaneous parametric down-conversion via bismuth borate.The silica-on-silicon integrated chip,which has an insertion loss less than 1 dB,is a Mach-Zehnder interferometer with a thermo-optic phase shifter.A high visibility of 100％ in the classical interference and 99.2％ in the two-photon interference is achieved,indicating that the two-photon interference with high interference visibility on the chip is attained successfully.