钛扩散铌酸锂波导中的低温电光偏振转换

Cryogenic electro-optic polarisation conversion in titanium in-diffused lithium niobate waveguides.

作者信息

Thiele Frederik, Vom Bruch Felix, Quiring Victor, Ricken Raimund, Herrmann Harald, Eigner Christof, Silberhorn Christine, Bartley Tim J

出版信息

Opt Express. 2020 Sep 28;28(20):28961-28968. doi: 10.1364/OE.399818.

DOI:10.1364/OE.399818

PMID:33114804

Abstract

Many technologies in quantum photonics require cryogenic conditions to operate. However, the underlying platform behind active components such as switches, modulators and phase shifters must be compatible with these operating conditions. To address this, we demonstrate an electro-optic polarisation converter for 1550 nm light at 0.8 K in titanium in-diffused lithium niobate waveguides. To do so, we exploit the electro-optic properties of lithium niobate to convert between orthogonal polarisation modes with a fiber-to-fiber transmission >43%. We achieve a modulation depth of 23.6±3.3 dB and a conversion voltage-length product of 28.8 V cm. This enables the combination of cryogenic photonics and active components on a single integration platform.

摘要

量子光子学中的许多技术需要在低温条件下运行。然而，诸如开关、调制器和移相器等有源组件背后的基础平台必须与这些运行条件兼容。为了解决这个问题，我们展示了一种用于在0.8 K温度下、钛扩散铌酸锂波导中实现1550 nm光的电光偏振转换器。为此，我们利用铌酸锂的电光特性在正交偏振模式之间进行转换，光纤到光纤的传输率>43%。我们实现了23.6±3.3 dB的调制深度和28.8 V·cm的转换电压长度积。这使得低温光子学和有源组件能够在单个集成平台上结合。