

GLACIER® — Cavity-Ringdown Reflectometer & Loss Meter (CW Laser Sources)
Design Tools
GLACIER® is a precision Cavity-Ringdown (CRD) Reflectometer and Loss Meter that utilizes cavity-ring-down spectroscopy to measure reflectivity, transmission, scattering and absorption of high-end optical coatings — with single ppm sensitivity.
GLACIER uses CW laser sources and is the foundation of UFI's GLACIER family of metrology instruments. It is essential for characterizing low-loss mirrors used in gravitational-wave detectors, optical-frequency combs, atomic clocks and resonant cavity experiments.
Key Product Features
- Single-ppm sensitivity for reflectance, transmission, absorption & scattering
- CW laser sources covering multiple discrete wavelengths
- Wavelengths: 532, 633, 800, 1064, 1550 nm (extendable on request)
- Compatible with high-reflectivity mirrors (R > 99.999%)
- Compact bench-top form factor
- Automated measurement software
Family Members
- GLACIER — CW Cavity-Ringdown Reflectometer (this model)
- GLACIER-C — Supercontinuum-source Cavity-Ringdown Reflectometer (broadband)
- GLACIER®-123 — 1064 nm Harmonics Reflectometer & Loss Meter
Developed at the Max-Planck-Institute of Quantum Optics. UFI is a spin-off from LMU Munich and the Max Planck Society.
| Models | GLACIER | GLACIER-C | GLACIER®-123 |
|---|---|---|---|
| Light source | Single-wavelength CW lasers | Supercontinuum (broadband) | 1064 nm + harmonics |
| Wavelength options | 532 / 633 / 800 / 1064 / 1550 nm (extendable) | Continuous broadband (configurable) | 1064, 532, 355 nm (fundamental + harmonics) |
| Number of wavelengths | Configurable (1-5+) | Broadband / continuous | Up to 3 simultaneously |
| Measurement type | Reflectance / Transmission / Absorption / Scatter | Same, broadband | Same, harmonic-resolved |
| Sensitivity | Single ppm | Single ppm | Single ppm |
| Compatible R range | R > 99.999% | R > 99.999% | R > 99.999% |
Source: UltraFast Innovations manufacturer datasheet. Download the brochure (PDF) from the Documents tab for full details.
Product Family: Reflectometer & Loss Meter (3 variants)
| Product | SKU | Size | Clear Aperture | Operating Wavelength | |
|---|---|---|---|---|---|
| GLACIER®-123 — 1064 nm Harmonics Reflectometer & Loss Meter |
| — | — | — | Contact |
| GLACIER®-C — Supercontinuum Cavity-Ringdown Reflectometer (Broadband Loss Metrology) |
| — | — | — | Contact |
| GLACIER® — Cavity-Ringdown Reflectometer & Loss Meter (CW Laser Sources) Current |
| — | — | — |






