Ultra-High Resolution Spectrometers – using Fabry-Pérot technology
Ultra-High-Resolution Spectrometers (Fabry-Pérot)
For the most demanding applications, IS-Instruments provides specialist consultancy in Fabry-Pérot–based ultra-high-resolution spectroscopy. Rather than supplying off-the-shelf instruments, we guide organisations that want to adopt, design, or refine Fabry-Pérot techniques. Through this consultancy, femtometre-level spectral resolution becomes achievable.
Our Directors, Dr Michael Foster and Dr Jonathan Storey, are internationally recognised as world-leading experts in Fabry-Pérot interferometry. They bring their deep technical knowledge and practical experience directly into client projects, ensuring every engagement benefits from decades of scientific and engineering leadership.
To support this work, we help clients understand how Fabry-Pérot interferometers function. These optical resonators rely on multiple-beam interference generated inside a cavity formed by two highly reflective, parallel surfaces. Each time light strikes a surface, part of it transmits while the remainder reflects, gradually creating a distinctive circular fringe pattern. Although similar to Michelson fringes, Fabry-Pérot fringes are thinner, brighter, and more widely spaced, enabling the precise resolution of fine spectral features.
Because every application is unique, all consultancy programmes and design studies are tailored completely to the client’s requirements.
Product Specifications
Designing and Optimising Fabry-Pérot Systems
We support clients who want to design, specify, or optimise ultra-high-resolution systems that use Fabry-Pérot techniques alongside advanced imaging detectors. Through this consultancy, organisations can achieve state-of-the-art spectral performance without needing in-house interferometric expertise.
Furthermore, we advise on both fixed and tunable configurations, helping clients reach exceptional levels of optical precision. Typical system designs operate across 300–2000 nm and can incorporate working diameters up to 200 mm, depending on the scientific or industrial challenge.
These approaches represent the latest advances in interferometric technology and are ideal for demanding ground-based applications – from astronomical observations to atmospheric LIDAR. Because every project has different priorities, we explore both imaging and filtering configurations to determine the most effective solution.
In many cases, high-end Fabry-Pérot systems include interference filters combined with double or triple etalon stages to achieve strong background suppression, high resolution, and high transmission. We also guide clients on mechanical and environmental design, including whether to use thermally controlled, hermetically sealed housings to stabilise performance.
All design studies and configurations are fully bespoke. In addition to whole-system design support, we also provide stand-alone optimisation services to refine an existing Fabry-Pérot specification to the client’s exact requirements.
Applications include:
- Astronomy
- Solar Observations
- High resolution Imaging spectroscopy
- LIDAR
- High resolution spectral measurement
Collaborative, Cost-Focused Development Support
Our team of engineers, scientists, and technicians brings world-leading experience in optical and interferometric instrumentation. We work closely with you to understand your goals, so we can develop precisely engineered, innovative solutions that meet your scientific, operational, or commercial needs.
Because development programmes can be costly, we maintain open, continuous communication throughout every project. This collaborative approach helps you stay in control of your budget while ensuring that every design decision aligns with your priorities.
Ultimately, our goal is to give you access to deep Fabry-Pérot expertise in a way that is transparent, efficient, and tailored to your application.