SEALSQ Initiates Early Commercialization of Miraex Quantum Photonics Platform Following Strategic Acquisition

SEALSQ Corp (NASDAQ: LAES) announced on July 31, 2026, it is initiating early commercialization of quantum photonics technology developed by Miraex SA. The company states it completed the 100% acquisition of the Swiss firm on June 2, 2026, as reported in a Form 6-K filing. SEALSQ reports its $200 million Quantum Fund has deployed more than $65 million into strategic quantum technology investments. Miraex, headquartered at the EPFL Innovation Park in Ecublens, Switzerland, is positioned as a key component of SEALSQ’s quantum photonics activities within its Quantum Sovereign Vertical Stack.

Thin Film Lithium Tantalate Photonic Platform

Miraex is developing a proprietary Thin Film Lithium Tantalate Photonic Integrated Circuit (TFLT PIC) platform designed to enable microwave-to-optical quantum transduction. The platform aims to enable coherent conversion of quantum information between microwave frequencies used by superconducting quantum processors and optical frequencies employed for long-distance quantum communications, with the goal of preserving quantum state properties. Quantum transduction remains an active research challenge, with key metrics such as conversion efficiency, noise, and fidelity not disclosed.

Lithium tantalate material platforms support low-loss photonic integrated circuits compatible with volume manufacturing processes and radiation-tolerant environments. The TFLT PIC approach targets a critical interconnect challenge in distributed quantum architectures by linking quantum processors operating in the microwave domain to optical channels. According to Carlos Moreira, Chairman and CEO of SEALSQ, ownership of this capability is intended to complement SEALSQ’s broader quantum and cybersecurity portfolio, which includes secure semiconductors, post-quantum cryptography, quantum networking, distributed quantum computing, and secure satellite communications. No performance benchmarks or deployment timelines were disclosed.

Commercial Markets and Stack Integration

Initial commercialization efforts are focused on potential applications in four areas:

1. Distributed Quantum Computing (DQC): Interconnecting separate quantum processors to increase computing capacity and enable modular quantum systems.
2. Quantum Networking: Building the optical backbone required for large-scale Quantum Key Distribution and future quantum internet infrastructure.
3. Quantum Sensing: Delivering ultra-sensitive photonic technologies for GPS-independent navigation, defense systems, critical infrastructure monitoring, and industrial applications.
4. What the company describes as a Quantum Orbital Space Cloud (QOSC): Providing radiation-tolerant photonic technologies for secure satellite communications and space-based quantum networks.