GLACIER®
Cavity-Ringdown (CRD) Reflectometer and Loss Meter
Our reflectometer GLACIER uses the extreme sensitivity of cavity ring-down spectroscopy to quantify the losses of advanced optical coatings down to 5 ppm. As a typical application the device can characterize supra-mirrors with up to 99.9995% reflectivity. Conventional absorption and reflection measurements are not sufficiently sensitive to quantify today´s super-reflective mirror coatings and are typically limited to the >1000 ppm range (corresponding to <99.9% reflectivity).
Cavity ring-down spectroscopy measures optical losses by the decay of the energy stored inside a cavity.
The technique reaches unrivalled sensitivity because the losses are experienced over and over again after every round trip inside the cavity. Smaller losses lead to longer intra-cavity dwell time thereby automatically increasing the measurement precision. The device features high-speed data acquisition and allows to record measurements within seconds.
It is delivered complete with a computer and a user-friendly software interface for acquisition and real-time analysis
Key Product Features
- Reflectivity measurements
- Reflectivities up to 99.9995%
- Various angles of incidence: 5° - 45° (and 0°)
- s and p polarization (separately)
- Antireflective coating characterization: Reflectivity down to 0.0005% (5 ppm)
- Simple and reproducible alignment: for 0.5", 1" and 2" optics
- Spring-loaded mirror fixtures for reproducible mounting without strain
- Computer and user-friendly software interface included
- High-speed data acquisition and real-time analysis: Complete measurement and analysis within seconds
- Available wavelengths:
- 375 - 1550 nm
- other wavelenghts are available upon request
- Standard Footprint: 90 x 45 cm2 (standard size)
A family of GLACIERs to choose from. Pick the one that suits your needs best:
| GLACIER | GLACIER-123 | GLACIER-C | |
|---|---|---|---|
| Number of wavelengths | One | Three | Three* |
| Maximum number of wavelengths | Three | Four | Unlimited! |
| Possible to add more wavelengths at a later point | Yes** | Yes** | Yes |
| Wavelength range | 375 — 1550 nm (diode laser based) |
355, 532 and 1064 nm 4th wavelength: diode laser based (375 — 1550 nm) |
450 — 2000 nm (freely selected) |
| Laser source | Diode laser | Microchip laser | Supercontinuum with monochromator |
| Footprint | 90 x 45 cm2 90 x 55 cm2 for more than 1 wavelength |
90 x 55 cm2 | 90 x 55 cm2 |
| Reflectivity measurements | Reflectivities up to 99.9995% | ||
| Antireflective coating characterization | Reflectivity down to 0.0005% (5 ppm) | ||
| Angle of incidence | 5° - 45° and 0° | ||
| Polarization | s and p (separately) | ||
| Optics size | 0.5", 1" (2” and more upon request) |
||
| Software | Computer and user-friendly software interface included | ||
*Included in the basic version, more can be added.
**Factory upgrade required. For GLACIER, a bigger footprint should be considered in advance (90 x 55 cm2).