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Solid etalon
The author :    time : 2016-06-14     Click on the number of times : 114
Solid etalon

 

Uncoated Silicon Etalons

Substrate MaterialSingle crystal Silicon
Surface Quality40-20 laser quality
Transmitted Wavefrontλ/10 at 633nm
Diameter Tolerance+ 0.00mm, - 0.25mm
Thickness ToleranceT ± 0.001mm
Wedge≤1 seconds
Chamfer0.35mm at 45° typical
Clear ApertureExceeds central 80% of dimension

 

Solid silicon etalons are interesting because the high index of silicon (3.4 depending on wavelength) creates a reasonably high finesse without any coatings. The temperature sensitivity of silicon can also be useful (or problematic).
 

 

Part No.Diameter (mm)Thickness (mm)FSR
ST025150.416100GHz
ST030150.83150GHz
ST100154.15510GHz
ST150158.3115GHz
ST2001516.6222.5GHz
ST3001541.5551GHz

 

Note: Other sizes are available upon request.

 

Uncoated Germanium Etalons

Substrate MaterialSingle Ge crystal
Surface Quality60-40 laser quality
Transmitted Wavefrontλ/10 at 633nm
Diameter Tolerance+ 0.00mm, - 0.25mm
Thickness ToleranceT ± 0.001mm
Wedge≤1 seconds
Chamfer0.35mm at 45° typical
Clear ApertureExceeds central 80% of dimension

 

Solid Germanium etalons have a high index (~4.0 depending on wavelength) that creates a reasonably high finesse without any coatings. They also remain transmissive farther out into the infrared that silicon etalons, the germanium etalon will still provide a decent signal at a wavelength of 14um. The temperature sensitivity of germanium is similar to silicon can also be useful (or problematic). These etalons are often used to monitor the wavelengths of long wave lasers.
 

 

 

Part No.Diameter (mm)Thickness (mm)FSR
GE0251525.41.46 GHz
GE03015380.98 GHz
GE0501550.80.73 GHz

 

Note: Other sizes are available upon request.

 

 

 

Uncoated Zinc Selenide Etalons

 

Substrate MaterialCVD ZnSe crystal
Surface Quality40-20 laser quality
Transmitted Wavefrontλ/10 at 633nm
Diameter Tolerance+ 0.00mm, - 0.25mm
Thickness ToleranceT ± 0.005mm
Wedge≤2.5 seconds
Chamfer0.35mm at 45° typical
Clear ApertureExceeds central 80% of dimension

 

Zinc Selenide etalons  have a reasonably high index (~2.5 depending on wavelength) that creates a reasonably high finesse without any coatings.  They also remain transmissive over a very broad wavelength range from 600nm to 20um.

 

Part No.Diameter (mm)Thickness (mm)Wavelength range
ZE025150.50.6-20um
ZE030151.00.6-20um
ZE050152.00.6-20um

 

Note: Other sizes are available upon request.


More discount for batch quantity , please contact [email protected] for quotation

 

 

Reproduced please specify:Laser Optex Inc. » Solid etalon

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