Design of a fully integrated CW-THz spectrometer

Onderzoeksoutput: Bijdrage aan congresAbstractAcademic

Samenvatting

This work presents a proof of concept for a fully CW-THz spectrometer realized in an InP-membrane platform. The system integrates both on-chip lasers as well as high speed UTC-PDs in order to relax the need for phase-locking and enable low phase noise detection compared to free space spectrometer systems. The system realizes THz generation using two on-chip lasers combined with a UTC-PD to perform optical down conversion. A second UTC-PD is used to perform homodyne detection by feeding this detector UTC-PD with the both the THz RF signal and the optical LO signal originating from the two lasers. An optical frequency shifter introduces an additional frequency shift to the RF signal before it enters the generator UTC-PD, such that the RF amplitude and phase information is mapped to a low frequency output signal during homodyne detection. An optical delay is added to the LO signal path to ensure that both the optical LO and electrical RF signal arrive at the detector UTC-PD simultaneously, significantly reducing the phase noise. The proposed system can be a proof of concept to enable fully integrated low cost and small form factor CW-THz spectrometers suitable for new applications requiring high throughput and improved sensitivity.
Originele taal-2Engels
StatusGepubliceerd - 8 apr. 2024
EvenementOptical Terahertz Science and Technology 2024 - Marburg, Marburg, Duitsland
Duur: 8 apr. 202412 apr. 2024
Congresnummer: 10
https://www.thz.org.mx/otst2024/index.php

Workshop

WorkshopOptical Terahertz Science and Technology 2024
Verkorte titelOTST 2024
Land/RegioDuitsland
StadMarburg
Periode8/04/2412/04/24
Internet adres

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