en.Wedoany.com Reported - SEALSQ Corp has completed the acquisition of all issued shares of Swiss photonics developer Miraex SA. The transaction was executed through SEALSQ's internal strategic fund SEALQUANTUM.com, which has a $200 million capital pool dedicated to building a vertically integrated sovereign quantum hardware value chain. This acquisition is the eighth major asset integration under the fund, combining Miraex's specialized micro-optics laboratory with existing subsidiaries, including French ASIC design company IC'ALPS, chip personalization facility Quantix Edge Security in Murcia, and Swiss compliance infrastructure provider WeCan Group SA.

This acquisition directly integrates Miraex's thin-film lithium tantalate (TFLT) photonic integrated circuit (PIC) platform into SEALSQ's hardware roadmap, bridging a key technology gap for multi-node quantum networks. Silicon spin and superconducting quantum processors generate and manipulate information at local cryogenic microwave frequencies (below 10 GHz). However, microwave photons cannot be transmitted through standard fiber optic lines or open space without immediate thermal decoherence. To build distributed quantum networks, systems require a low-loss hardware link capable of performing coherent state translation.

Miraex addresses this bottleneck through electro-optic transduction. Its TFLT PIC chip acts as a bridge, encoding the fragile quantum states of microwave photons onto optical frequency photons (near 1550 nm) while maintaining phase entanglement. The material properties of the lithium tantalate layer provide a high electro-optic coefficient, minimal optical dispersion, and a compact power footprint. This configuration enables the hardware to perform multi-node entanglement distribution, establishing the physical layer foundation for scalable distributed quantum computing (DQC) clusters and remote quantum key distribution (QKD) arrays.

This integration accelerates the development of the Quantum Orbital Space Cloud (QOSC), SEALSQ's flagship program to deploy quantum-secure communication networks in low Earth orbit (LEO). The radiation-resistant and compact architecture of the TFLT PIC framework makes it suitable for integration into space-grade payloads. Managed by SEALSQ Chairman and CEO Carlos Moreira and Miraex CEO Daniel Brau, the engineering roadmap will focus on embedding these photonic transduction modules directly into the WISeSat.Space nanosatellite constellation. This ground-space infrastructure loop aims to protect global critical assets from post-quantum cryptographic threats, providing sovereign, information-theoretically secure routing structures for the financial, defense, and national security sectors.

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