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空腔损耗计和反射计 | 瑆创光学电子商店

光学镀膜CRD反射计

Key Product Features

  Reflectivity measurements up to 99.9995%

  Various angles of incidence: 5°-45° (and 0°)

  S and p polarization (separately)

  Antireflective coating characterization down to 0.0005% (5 ppm)

  Simple and reproducible alignment for 0.5”, 1” and 2” optics

  High-speed data acquisition and real-time analysis

  Wavelengths in the range 375-1550 nm available

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Model GLACIER

Cavity-Ringdown (CRD) Loss Meter and Reflectometer


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 losses are experienced with each round trip inside the cavity over and over again. Smaller losses lead to longer intra-cavity dwell time thereby automatically increasing 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.


Model GLACIER-123

1064nm Harmonics Reflectometer and Loss Meter 


GLACIER®-123 designed as a multi-wavelength system, it is the first of its kind to measure at 355 nm. It includes a microchip laser that emits 1064, 532 and 355 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.


Model GLACIER-C

Supercotinuum light source Cavity-Ringdown Reflectometer


GLACIER®-C is a further development of our successful reflectometer. it allows measuring the losses of optical coatings down to 5 ppm using the extremly sensitive cavity ring-down spectroscopy method. It is therefore often used to characterize highly reflective mirrors where conventional reflection and absorption measurements are insufficient. The innovation of GLACIER®-C is the employment of a super- continuum laser source in combination with a tunable monochromator. This allows a freely selectable wavelength within 450 nm and 2000 nm and, thus, offers an unprecedented flexibility as it is not limited to available diode laser wavelengths. GLACIER®-C combines the unrivalled sensitivity of GLACIER® with a unique wavelength flexibility, creating the most powerful device on the market. The device features high-speed data acquisition and allows to record measurements within seconds. Easy and fast change of wavelength is facilitated through the user friendly software and easy change of optics on kinematic mounts.



Specification Guide


ModelGLACIERGLACIER-123GLACIER-C
Number of wavelengthsOneThreeThree*
Maximum number of wavelengthsThreeFourUnlimited!
able to add more wavelengthsYes**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 sourceDiode laserMicrochip laserSupercontinuum with monochromator
Footprint90 x 45 cm290 x 55 cm290 x 55 cm2
Reflectivity measurementsReflectivities up to 99.9995%
Antireflective coating characterizationReflectivity down to 0.0005% (5 ppm)
Angle of incidence5° - 45° and 0°
Polarizations and p (separately)
Optics size0.5", 1" (2” and more upon request)
SoftwareComputer and user-friendly software interface included



GLACIER

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.

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Sketch of the working principle of GLACIER, measurement and fitting procedure


Sample Measurement

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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:


                             image.png


The time constant τ is inversely proportional to the optical losses (1-R) of the cavity 

withtotal reflectivity R:


                               image.png


where n is the refractive index, c is the speed of light, and l is the cavity length


Typical GLACIER measurement of an ultrahigh-reflective mirror for 1030 nm. 

To obtain the data, the cavity losses with and without the sample were 

measured and subtracted. This provides an absolute measurement 

of the test mirror










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Compare Model Drawings & Specs Availability Reference Price
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GLACIER
Optical coating Reflectometer and loss meter
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GLACIER -123
Optical coating Reflectometer and loss meter
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GLACIER - C
Optical coating Reflectometer and loss meter
Contact Us Request for quote

GLACIER - C - Parameter

GLACIER -123  - Parameter

GLACIER  - Parameter

GLACIER - C - Download

GLACIER -123  - Download

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