Modular microring laser cavity sensor

Lantian Chang*, Michiel de Goede, Meindert Dijkstra, Carlijn I. van Emmerik, Sonia M. García-Blanco

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
52 Downloads (Pure)

Abstract

We propose and experimentally demonstrate a modular microring laser (MML) cavity for sensing applications. The proposed MML permits much more design freedom compared with a traditional simple ring cavity by decoupling the performance parameters into several regions in the cavity. Thus, the different biosensor performance parameters can be optimized semi-independently limiting the need for trade-offs on the design of the biosensing device. The first generation MML has been fabricated and tested. A fiber-to-fiber slope efficiency of up to 1.2%, a temperature coefficient of 1.35 GHz/K and a 3σ limit of detection (LOD) of 3.1 × 10−7 RIU without averaging and 6.0 × 10−8 RIU with a 60 s averaging, has been measured for the MML sensor, which is a record-low LOD in on-chip ring cavity optical sensors. Further optimization is possible, capitalizing on the key advantage of the MML concept, namely the potential for designing the laser cavity to achieve the desired optimization goals.

Original languageEnglish
Pages (from-to)1371-1383
Number of pages13
JournalOptics express
Volume29
Issue number2
DOIs
Publication statusPublished - 18 Jan 2021

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