This fundamental difference allows quantum systems to solve certain classes of problems dramatically faster than any classical computing system. Active applications being developed and explored today include:

• Advanced drug discovery and molecular simulation
• Cryptography and next-generation cybersecurity
• Logistics and financial optimization problems
• Artificial intelligence and machine learning acceleration
• Development of new materials and energy solutions

While the technology is still maturing, rapid progress is being made globally. Leading technology companies, well-funded startups, and major research institutions are racing to build scalable, fault-tolerant quantum systems capable of delivering practical advantages over classical computing.
 

Where the technology stands today

The current phase of quantum computing is referred to as the NISQ era (Noisy Intermediate-Scale Quantum), where systems are being developed and tested with tens to hundreds of qubits. Researchers and industry leaders are actively working to improve system stability, scalability, and error correction.

A critical and often overlooked component of these systems is high-precision optical connectivity. Quantum devices require exacting control, measurement, and communication between the quantum hardware and its supporting classical electronics. Fiber-optic connections carry these signals with the precision, low thermal conductivity, and immunity to electromagnetic interference that quantum systems demand. This is where Coastal Connections' expertise becomes essential.
 

Why fiber optics are critical to quantum computing

Cryogenic compatibility

Most superconducting quantum computers operate at temperatures near absolute zero — as low as 20 millikelvins. Electrical wiring creates thermal load that can compromise qubit coherence. Optical fibers, by contrast, have extremely low thermal conductivity, allowing signals to pass from room-temperature electronics into cryogenic environments without destabilizing the quantum system. The National Institute of Standards and Technology (NIST) has demonstrated that fiber-optic photonic links can meet the control and measurement requirements of superconducting quantum information processing at this scale.
 

Ultra-low optical loss

In quantum photonic systems, even minute signal loss affects system fidelity and qubit measurement accuracy. Custom fiber assemblies engineered to minimize insertion loss — the reduction in signal power as light passes through the fiber and its connectors — are essential for maintaining the integrity of the optical signals that control and read quantum states.
 

Electromagnetic immunity

Quantum systems are extraordinarily sensitive to electromagnetic interference. Fiber optic cables carry light, not electrical current, and are therefore completely immune to EMI. This makes them the preferred interconnect technology for quantum hardware environments where electromagnetic noise must be minimized.
 

Photonic quantum computing

Beyond supporting superconducting quantum computers, optical fiber plays a central role in photonic quantum computing — an approach that uses photons as qubits and fiber or integrated photonic waveguides as the medium for quantum operations. Coastal Connections has deep expertise in the precision fiber architectures required by these systems.

Coastal Connections: a key enabler of quantum computing

At Coastal Connections, we support quantum computing developers with custom fiber-optic assemblies engineered for the extreme precision and reliability that quantum systems demand. Our engineering teams work closely with customers to design optical solutions that address the unique challenges of quantum hardware environments, including:

• Ultra-low optical loss assemblies for photonic fidelity
• High-precision fiber alignment for photonic quantum systems
• Specialized connectors and coatings for cryogenic environments
• Custom optical architectures tailored to specific quantum platforms
• Polarization-maintaining (PM) fiber assemblies for interferometric applications
• Compatibility with advanced photonic integrated circuits and free-space optics
• Precision polarization extinction ratio (PER) testing across wavelengths

Through close collaboration with leading quantum technology companies, our engineering teams help develop and refine the optical infrastructure that enables next-generation quantum processors and photonic quantum systems.

"Coastal Connections is one of the top specialized fiber-optic suppliers in the United States supporting quantum technology infrastructure."

Key specifications for quantum computing fiber optic assemblies

Quantum computing applications supported

 
Our fiber-optic assemblies support a range of quantum computing platforms and architectures, including:

• Superconducting qubit systems: photonic links between room-temperature electronics and cryogenic quantum circuits
• Photonic quantum computers: precision fiber architectures for photon-based qubit systems
• Trapped ion quantum computers: optical delivery and collection for laser-based qubit control
• Quantum key distribution (QKD): PM fiber assemblies for secure quantum communication
• Quantum networking: fiber connections for entanglement distribution and quantum repeater systems
• Quantum sensing: precision fiber assemblies for atomic clocks, gravimeters, and magnetometers

Partner with Coastal Connections

As quantum computing continues to evolve, the need for precision photonics, advanced fiber connectivity, and scalable manufacturing will only increase. Coastal Connections is proud to be part of this transformation, working alongside pioneering companies to support the development of the next generation of quantum computing systems.

Whether you are developing a photonic quantum processor, a superconducting qubit platform, or a quantum networking system, our engineering team is ready to help you design and build the optical infrastructure your system requires.