A fully packaged silicon photonic Bragg grating temperature sensor with a compact back side interface based on a ball lens

Jeroen Missinne; Viktor Geudens; Steven Van Put; Giannis Poulopoulos; Michal Szaj; George Syriopoulos; Charalampos Zervos; Hercules Avramopoulos; Geert Van Steenberge

doi:10.1117/12.2647381

13 March 2023 A fully packaged silicon photonic Bragg grating temperature sensor with a compact back side interface based on a ball lens

Jeroen Missinne, Viktor Geudens, Steven Van Put, Giannis Poulopoulos, Michal Szaj, George Syriopoulos, Charalampos Zervos, Hercules Avramopoulos, Geert Van Steenberge

Author Affiliations +

Proceedings Volume 12426, Silicon Photonics XVIII; 124260F (2023) https://doi.org/10.1117/12.2647381
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

With the increased interest in silicon photonics, smart integration and packaging technologies are essential to transform photonic integrated circuits (PICs) into functional photonic systems. Especially for sensing, the currently existing standard packaging technologies are too expensive and bulky. We developed a solution for integrating a 1 mm x 1 mm sensor PIC with a single mode fiber and packaging it in a 1.5 mm inner-diameter metal protective tube. The concept relies on interfacing a grating coupler with a fiber from the back side of the PIC employing a 300 μm ball lens mounted in a laser-fabricated fused silica precision holder. It is shown that the additional insertion loss caused by the ball lens interface is very limited. A packaged sensor was achieved by sequentially mounting the holder on a ceramic ferrule, then the PIC on the holder and finally gluing a metal tube surrounding the assembly, taking care that the PIC surface is flush with the end face of the tube. The back side fiber interface ensures that the PIC’s surface remains accessible for sensing, while the tube protects the fiber-to-PIC interface. We demonstrated this concept by realizing a packaged phase shifted silicon Bragg grating temperature sensor operating around 1550 nm, which could be read out in reflection using a commercial interrogator. A temperature sensitivity of 73 pm/°C was found, and we demonstrated sensor functionality up to 180°C.

Conference Presentation

Citation Download Citation

Jeroen Missinne, Viktor Geudens, Steven Van Put, Giannis Poulopoulos, Michal Szaj, George Syriopoulos, Charalampos Zervos, Hercules Avramopoulos, and Geert Van Steenberge "A fully packaged silicon photonic Bragg grating temperature sensor with a compact back side interface based on a ball lens", Proc. SPIE 12426, Silicon Photonics XVIII, 124260F (13 March 2023); https://doi.org/10.1117/12.2647381

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available