Cavity Ring-Down – CRD Reflectance characterization of ultra low loss mirrors


LD-PD's Ultra low loss mirrors with reflectance of more than 99.9% are impossible to characterize by standard reflectance measurements such as spectrophotometry because of measurement uncertainties in the range of 0.5%.This can be overcome with the help of the cavity ring-down (CRD) technique, which enables reflectance measurements of 99.99% or even 99.999%.



Product model


Name Model Price
1392nm 1inch CRD ultra low loss mirrors   [PDF]  [RFQ]

CRD-246-59-1392-1000-0
Stock NO.: A80150657
[Please inquire]
1392nm 0.5inch CRD ultra low loss mirrors   [PDF]  [RFQ]

CRD-126-59-1392-1000-0
Stock NO.: A80150658
[Please inquire]
1512nm 1inch CRD ultra low loss mirrors   [PDF]  [RFQ]

CRD-246-59-1512-1000-0
Stock NO.: A80150659
[Please inquire]
1512nm 0.5inch CRD ultra low loss mirrors   [PDF]  [RFQ]

CRD-126-59-1512-1000-0
Stock NO.: A80150660
[Please inquire]
1572nm 0.5inch CRD ultra low loss mirrors   [PDF]  [RFQ]

CRD-126-49-1572-1000-45
Stock NO.: A80160426
[Please inquire]
1580nm 1inch CRD ultra low loss mirrors   [PDF]  [RFQ]

CRD-246-49-1580-1000-0
Stock NO.: A80160148
[Please inquire]
1650nm 2inch CRD ultra low loss mirrors   [PDF]  [RFQ]

CRD-508-49-1650-1000-0
Stock NO.: A80161154
[Please inquire]
1742nm 1inch CRD ultra low loss mirrors   [PDF]  [RFQ]

CRD-246-49-1742-1000-0
Stock NO.: A80160153
[Please inquire]


Parameter



Features

● Reflectance values > 99.995%

● Angles of incidence: 0°or 45°

● s and p polarization, separately

● Easy and reproducible alignment for up to Ø=2 inch optics

● Wavelength range: 355nm-15um

● Customized setups and measurement service

Specifications

Parameter

unit

Index

Dimension

Inch

0.5/1/2inch

Thickness

mm

6.35

Wavelength

nm

CWL±50nm

Reflectance values

%

≥ 99.99

Operating temperature

-5 to 70

Storage temperature

-40 to 85


Tolerances

Index

Diameter Ø:

+0.0/-0.1 mm

Thickness t:

±0.1 mm

Flatness:

3/0.1 (0.1/0.05)
  compares to λ/20

Radius of curvature:

±1%

Centering/Wedge:

<5 min. of arc

Chamfer:

0.1–0.3 mm x 45°

Clear aperture:

> 80%

Surface imperf. tol.: 5/3 x 0.025


Cavity ring down curve

tt.png


Dimension

bf.png

Working Theory

th.png

Measurement signal of a dielectric mirror with

Measurement principle. a reflectance of > 99.98%.


th1.png

Application

● CRDS

● Ring laser Gyro

● TDLAS Cell

Ordering Info

CRD-①-②-③-④-⑤-⑥  CRD: Cavity Ring-Down 

: Size

126: 0.5inch , 246: 1inch, 508: 2inch

②: Reflectance values

39: 99.9%49:99.99%, 59:99.999%

: Wavelength

1392: 1392nm1512: 1512   nm, 1572: 1572nm,1600: 1600nm,1653: 1653nm,1742: 1742nm, SS: Specify

④: Radius of curvature

1000: 1000mm, 500: 500mm, 0: Flat Mirror

⑤: Angles of incidence

0: 0°, 45: 45°



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