Variable optical true-time delay line breaking bandwidth-delay constraints

被引：7

作者：

Petrini, Matteo ^{[1
]}

Seyedinnavadeh, Seyedmohammad ^{[1
]}

Grimaldi, Vittorio ^{[1
]}

Milanizadeh, Maziyar ^{[1
,2
]}

Zanetto, Francesco ^{[1
]}

Ferrari, Giorgio ^{[1
]}

Morichetti, Francesco ^{[1
]}

Melloni, Andrea ^{[1
]}

机构：

[1] Politecn Milan, Dept Elect Informat & Bioengn, I-20133 Milan, Italy

[2] CNR, Ottawa, ON, Canada

来源：

OPTICS LETTERS | 2023年 / 48卷 / 02期

关键词：

Group delay - Time delay - Timing circuits;

D O I：

10.1364/OL.478102

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Continuously variable true-time optical delay lines are typically subject to a constraint of the bandwidth-delay product, limiting their use in several applications. In this Letter, we propose an integrated topology that breaks the bandwidth-delay product limit. The device is based on multiple Mach-Zehnder Interferometers (MZIs) arranged in parallel, providing easier control and a larger bandwidth compared to ring resonator-based solutions. The functionality of this architecture is demonstrated with a 4-stage delay line by performing measurements in both the time and frequency domains. The delay line introduces a delay of 90 ps over a bandwidth of more than 22 GHz with a negligible group delay distortion, operates on a wavelength range of about 60 nm, and is scalable to a higher number of MZI stages.(c) 2023 Optica Publishing Group

引用

页码：460 / 463

页数：4

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