Photonic Integrated Continuous Wave Terahertz Spectrometer with 90 dB Dynamic Range and 4 THz Bandwidth

被引：0

作者：

Schwenson, Lauri ^{[1
]}

Liebermeister, Lars ^{[1
]}

Walter, Florian ^{[1
]}

Nellen, Simon ^{[1
]}

Schell, Martin ^{[1
]}

Kohlhaas, Robert B. ^{[1
]}

机构：

[1] Fraunhofer Heinrich Hertz Inst, Berlin, Germany

来源：

2024 49TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES, IRMMW-THZ 2024 | 2024年

关键词：

terahertz; terahertz spectroscopy; frequency domain; photomixing; optoelectronic; photonic integration; photonic integrated circuit; sampled grating DBR; CIRCUIT;

D O I：

10.1109/IRMMW-THz60956.2024.10697922

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present the first photonic integrated terahertz spectrometer that is able to cover the tuning bandwidth of state-of-the-art continuous wave (cw) terahertz (THz) antennas. The dedicated photonic integrated circuit (PIC) based on two widely tunable sampled grating DBR (SG-DBR) lasers allows for the generation of up to 5 THz optical difference frequency for THz spectroscopy. With an integrated phase control, the amplitude and phase of the THz signal are detected without the need for any moving parts such as fiber stretchers or free-space optics. Our experimental evaluation is the first demonstration of 90 dB peak dynamic range and 4 THz bandwidth with a PIC spectrometer. This approach is a milestone towards photonic integrated, compact and economic THz systems for cost-sensitive areas in research and industry.

引用

页数：2

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