The REDEEMA project will design and develop an inexpensive manufacturable (III-V semiconductor material based) infrared (IR) sensing array for monitoring greenhouse gases (GHGs). A paradigm in high sensitivity mid-IR GHG sensing, the REDEEMA sensor will aid existing analytical instrumentation in the intelligent field deployment of the quantitative analysers and/or in the determination of gas sources. It will improve performance and open many new opportunities with environment applications.

QPods is a dedicated mechanically and thermally stable optoelectronics module to drive magneto-optical traps (MOT) used in several UK Quantum projects. The QPods project will considerably reduce the SWAPC by holistically integrating all the essential components into a single ruggedised package. Existing systems are based on laboratory-grade components (often Thorlabs). Manual alignment of optical components on optical tables leads to instability of the overall system and reduction in performance due to continual alignment drift. This leads to difficulties in system-level production of atom trap-based quantum products. In this project, Bay Photonics will develop QPods, in collaboration with NPL and with close engagement with a user advisory board (UAB) comprising several end-users and system integrators. Several UAB members are developing/have systems that include various configurations of MOT chambers; each have expressed the critical need for QPods to compliment/complete their product offerings. Compared with existing systems, QPods offers (i) \>3000x improvement in optical alignment drift (vs. manual tuning X-Y stages/mounts), (ii) reduction in the number of components (no alignment optics required), (iii) considerable improvement in mechanical and thermal stability (e.g. MIL-spec), (iv) reduction in overall form-factor from ~60,000 cm3 to <100 cm3, (v) highly scalable production thereby reducing future costs, (vi) eliminates the need for labour intensive manual tuning -- essential for applications outside the laboratory. QPods will enable Bay Photonics to establish themselves as key suppliers to the UAB and wider cold-atom community. Augmented designs will seek exploit opportunities in ion-trapping applications (for e.g. Quantum Computers), high-speed telecoms and LIDAR will also be explored in the project.

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Quantum technologies are a core asset in the UK industrial strategy. They will secure the digital world, see where current cameras cannot, and underpin new drugs, thanks to quantum computers solving currently intractable calculations. In collaboration with the Universities and Research Centres, UK high-tech industries are working on translating them from scientific concepts to available technologies, products, and capabilities. To support this challenge, more than £1Billion has been committed in both Government and Industry funding. Photonics is one of the sectors leading the development and deployment of quantum technologies. Light can carry quantum-secured communications, measure faint signal such as gravitational waves, and solve quantum algorithms. Photonics-based quantum technologies are either required to measure single photons one at a time (single-photon detectors) or to record continuous quantum light signals (proportional detectors) with minimal losses to retain the signatures that make them different from classical light. Here we address this second approach to quantum optical technologies. Today, applications based on such measurement schemes are limited, and detectors are home-built by researchers, often at significant cost in time and monetary. With this project, we join the expertise and capabilities of Bay Photonics (optical packaging and optoelectronics), RedWave Labs (electronics), the experience and resources of the Centre for Process Innovation (photonic applications) and of research teams at the Universities of Strathclyde and Glasgow (quantum sources, low-noise electronics, quantum metrology) to design, build and test a prototype of a quantum sensor able to address this gap in the market and supply chain. We aim to provide the first commercial solution for measuring quantum states of light composed of thousands to several billion photons. The engagement of the Centre for Process Innovation and the University teams will, on the one hand, contribute to the design of the product, and on the other, serve as an end-user test for the developed technology. The outcome of this endeavour will be a versatile solution for the high sensitivity measurements empowering quantum metrology and some of the most advanced concepts of quantum computing.

**Quantum technologies (QT)** are transforming our economy and education. Slowly but steadily delivering novel capabilities to secure communications, measure undetectable signals, and in a not-so-far future, revolutionise computing. Light plays a pivotal role as a carrier for quantum signals and as the interface between the new quantum hardware and the available technology. For example, entangled photons -- light particles strongly connected even when far apart -- can be routed over the available fibre network and are required in several quantum cryptographic schemes and all-optical quantum computers. For light to fulfil its mission as quantum herald, we need to embed it in a compact, scalable, and mass-producible platform. With PADME, we propose investigating **Photonic Integrated Circuits (PICs)** as a source of quantum states of light, following the steps that brought electronics to today's consumer market a few decades ago. We will study how to generate and extract entangled photons from a PIC component of our own design and fabricated by a commercial foundry. We will combine our in-house photonics and optoelectronics packaging know-how (Bay Photonics), years of academic research excellence (Universities of Strathclyde and Glasgow), and the most recent advances of commercial PIC foundries to deliver a high-performance, compact, and reliable source of entangled photon pairs that will service a global market and bolster the UK's position as a world-leader in quantum and photonic innovation. We expect this feasibility study to stimulate further R&D and market awareness into adopting the PIC approach for quantum technologies and developing a national quantum PIC supply chain.