1064 nm Harmonics Reflectometer and Loss Meter
GLACIER®-123 is the latest addition to UFI's® GLACIER® family. Designed as a multiwavelength system, it is the first of its kind to measure at 355 nm. It includes a microchip laser that emits 1064, 532 and355 nm radiation, making it particularly interesting for those in need of these harmonic wavelengths.
Our reflectometers use the extreme sensitivity of cavity ringdown 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. Lower 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
Operating wavelengths: 355, 532 and 1064 nm (possible to add a 4th diode-laser-based wavelength)
Standard Footprint: 90 x 55 cm2
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 wavelength90 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).
Working Principle:
Glacier uses the principle of reflectivity/loss measurements with cavity ring-down spectroscopy based on very low losses at each mirror bounce. The laser pulses travel inside a cavity experiencing optical losses over and over again during each round trip.
Sketch of the working principle of GLACIER, measurement and fitting procedure.
The device measures the time-dependent intensity I(t) leaked through an end mirror of the cavity (center).
The signal decays with a time constant depending on the intra-cavity losses and can be fitted to the following exponential function:
The time constant τ is inversely proportional to the optical losses (1-R) of the cavity with total reflectivity R:
where n is the refractive index, c is the speed of light, and l is the cavity length.
Sample Measurement:
Typical GLACIER measurements of low-loss mirrors at 1064 nm, 532 nm and 355 nm. To obtain the sample losses, the cavity losses with and without the sample were measured and subtracted. This provides an absolute measurement of the test mirror.
商品属性 [波长] 355, 532 and 1064 nm