Time-correlated single-photon counting (TCSPC) has been established as the preferred detection approach for high performance lidar and depth profiling due to its excellent surface to surface resolution and high optical sensitivity. 
This presentation will show the results of laboratory-based experiments obtained using different optical transceiver configurations. Particular attention will be given to underwater depth imaging using an individual commercially available silicon single photon avalanche diode (Si-SPAD) detectors, and prototypes of Si-SPAD detector arrays fabricated in complementary metal-oxide semiconductor (CMOS) or in custom fabrication technology. 
Depth and intensity profiles of stationary and moving targets were obtained under several underwater scattering conditions. The spatial resolution of each system was investigated in order to provide an estimation of the image degradation as the level of scattering increased. Data were analyzed using a pixel wise cross correlation approach, however additional bespoke image processing approaches will be discussed.

Underwater single-photon depth imaging



**Session Chair:** Ross Donaldson (Heriot Watt University)

**Speaker:** Aurora Maccarone (Heriot-Watt University)   
**Speaker:** Elke Neu-Ruffing (University of Kaiserslautern)   
**Speaker:** Fred Daum (Raytheon)  
**Speaker:** Agustina Gabriela Magnoni (Laboratorio de Óptica Cuántica, DEILAP UNIDEF (CITEDEF-CONICET))   
**Sponsor Demo:** LIGENTEC 


Session Three

technical paper

**BQIT is a three day annual workshop** aimed at enabling leading UK and international academics and industrial partners to come together; to explore and discuss future ambitions and challenges in the field of **Quantum Information Technologies.** Since our conception in 2014 we have had 230 speakers and panellists who have presented their work and opinions on a range of topics, from quantum theory to innovation in industry.


### Welcome Message
The BQIT:21 team welcomes you to the eighth Bristol Quantum Information Technologies workshop! 

Last year was the first time in our workshop's history that we had gone fully virtual. The global circumstances that continue to impact us all professionally and personally have forced BQIT once again to be delivered as an all-virtual workshop for 2021. The access this creates to colleagues across the world who would otherwise be unable to join us, as well as being able to make the workshop free for all attendees due to the lower costs involved in delivering an online workshop, are just a couple of the extraordinary benefits of meeting online. This also means that we can welcome three times as many attendees to BQIT than previous years.   

We take this opportunity to thank each of our speakers and poster presenters for contributing their technical content, this year's sponsors, whose support this year enabled BQIT:21 to be free to all attendees, and to all of our attendees for joining us online this year. We recognise the extra energy required to stay connected and motivated during these difficult times, and are hugely encouraged to see so many of you willing to continue to connect with us on an online platform. 

It is our hope that you have a productive and enjoyable time while you engage and interact with BQIT:21, and to everyone that has helped take BQIT:21 online, thank you! 

**The BQIT board and organisation team **


![](https://assets.underline.io/uploads/markdown_image/1/image/a12e0c1ad3410144cb48557690e4ecaf.png)
### This year's workshop agenda is available here: [Virtual BQIT:21](https://drive.google.com/file/d/1QwsSM0ztnxC_lgUKf3TbO3GvnI44AQkY/view?usp=sharing)
For further information, please contact us at: **bqit-admin@bristol.ac.uk**

![](https://assets.underline.io/uploads/markdown_image/1/image/a12e0c1ad3410144cb48557690e4ecaf.png)

Aurora Maccarone

1

SHORT BIO

Presentations

Underwater single-photon depth imaging

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