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Bare glass absorption Tubes
The author :    time : 2016-06-04     Click on the number of times : 158
bare absorption tubes

Laser Optex offers all kinds of bare absorption tubes.  These tubes are useful for free space optical applications, such as those that require wavelengths where optical fiber is not applicable.  We have many gases available and can provide mixtures as well.  For example, our customers often request a backfill of nitrogen to mimic atmospheric conditions.

Tubes are made custom to order so several configurations are possible.  When requesting an absorption tube, you may refer to our handy Absorption Tube Info Sheet.  Of course, please contact us with any questions.  We’d be eager to hear about your application!



Below you will find a drawing and general specifications and configurations for our glass tubes.  For our copper tubes (useful for caustic gases such as HF)


Absorption Tube


Sketch of an absorption tube. Note: this drawing is not to scale.


Length: 2cm < L < 20cm (2cm, 5cm, 10cm standard)

Outer Diameter (OD): 12mm and 25mm standard; 5mm and 9mm also available

Tipoff: T < 10mm

Window Tilt: 3 degrees

Window Wedge: 0.3 degrees

Window material:  B270 Crown Glass (<2.6 microns); MgF2 (<8 microns); ZnSe (<14 microns)


Window Material

< 2.6 microns:  We supply wedged B270 Crown glass windows AR-coated for 600, 1330, 1550 or 1700nm.  AR-coatings are provided at no extra charge.


< 8 microns:  We supply wedged MgF2 windows.  These provide excellent transmission and are lower cost than our ZnSe windows.  They are available for our 12mm and 25mm outer diameter tubing


< 14 microns:  For applications past 8 microns, we use ZnSe windows.



Custom bare absorption tubes are available on enquiry.

More discount for batch quantity , please contact sales@laseroptex for quotation



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