Absorption Characterization of an ion beam figured sample

Document #:

LIGO-T1000032-v1

Document type:

T - Technical notes

Abstract:

Absorption characterization by Ashot Markosyan at Stanford.

Background
During the CSIRO kickoff meeting, it was brought to our attention that Ion beam figuring of fused silica may increase the absorption of fused silica (we use ion beam figuring in our Advanced LIGO process). We asked our polisher to modify a 1" sample that we provided by uniformly removing material from one side of the sample. They removed ~60nm of material from the front surface of a QED polished sample. There is no other history to the part, we simply want to know if the ion beam figuring changes the absorption characteristics of the glass.

Files in Document:

• T1000032-v1_IBF Absorption1.pdf (file is not accessible)
• T1000032-v1_IBF Absorption2.pdf (file is not accessible)

Topics:

• Core Optics

Authors:

• Ashot Markosyan