ETM08 HR Coating Absorption

Document #:

LIGO-E1300312-v4

Document type:

E - Engineering documents

Abstract:

ETM08 HR coating absorption measurement at Caltech OTF.

As of -v4 ETM08 has has S1 re-polished and re-coated.
2 absorbing points are found within an 80 mm central diameter.
100+ ppm, ⌀ =3.2 µm, R = 24 mm
300 ppm, ⌀ = 5.4 µm, R = 25 mm

Files in Document:

• Background absorption (etm08a_hrabs_060722_1.pdf, 14.5 kB)

Other Files:

• Gentle Absorption - verified points (etm08a_hrabs_051622_1_E1300312-v4.pdf, 569.7 kB)
• Gentle absorption data (etm08a_hrabs_051622_1c_dw.txt, 4.2 MB)
• The images of the two point absorbers (etm08_points.pdf, 469.0 kB)

Topics:

• Core Optics
• Subsystem Test

Authors:

• Liyuan Zhang
• Margot Hennig
• GariLynn Billingsley

Keywords:

ETM ETM08 HR Absorption

Related Documents:

• LIGO-E1000782: ETM08 Characterization

Referenced by: