Systematic measurement of the intrinsic losses in various kinds of bulk fused silica

TL;DR

This study systematically measured mechanical losses in different types of bulk fused silica, revealing a wide range of quality factors, frequency dependence, and reduction of losses through annealing, contributing valuable data for optical and mechanical applications.

Contribution

The paper provides the first comprehensive comparison of intrinsic mechanical losses across various bulk fused silica types, highlighting the effects of frequency and annealing.

Findings

Quality factors ranged from 7x10^5 to 4x10^7.

Losses decrease after annealing.

Losses show frequency dependence.

Abstract

We systematically measured and compared the mechanical losses of various kinds of bulk fused silica. Their quality factors ranged widely from 7x10^5 to 4x10^7, the latter being one of the highest reported among bulk fused silica. We observed frequency-dependent losses and a decrease in the losses upon annealing.