-
Notifications
You must be signed in to change notification settings - Fork 0
/
thermalnoise.html
38 lines (30 loc) · 2.27 KB
/
thermalnoise.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html">
<TITLE>Thermal Noise</TITLE>
</HEAD>
<BODY>
<h1 style="color:Violet;text-align:center;">Thermal noise</h1>
<p style="color:Tomato;">During my PhD, I developed a direct approach to calculating thermo-mechanical
noise in LIGO interferometers:</p>
<p style="color:Blue;text-align:center;">
<a href="https://scholar.google.com/citations?view_op=view_citation&hl=en&user=_zkAFbEAAAAJ&cstart=20&pagesize=80&citation_for_view=_zkAFbEAAAAJ:maZDTaKrznsC">
Internal thermal noise in the LIGO test masses: A direct approach</a></p>
<p style="color:Tomato;">The method is computationally cheap, has significant conceptual advantages, and is widely used inside and
outside LIGO community. I pointed out that coatings might be
the source of noise that people could have missed. This turned out indeed to be the case, and the coating thermal noise is among
the dominant sources
of noise in many optomechanical experiments. Research on how to reduce it is an
active field in precision measurements.</p>
<p style="color:tomato;text-align:center;"> I have also developed a simple method to compute thermo-refractive noise; this is increasingly
being used in a number of photonics applications, as devices become increasingly thermal-noise limited:</p>
<p style="color:blue;text-align:center;"><a
href="https://scholar.google.com/citations?view_op=view_citation&hl=en&user=_zkAFbEAAAAJ&cstart=100&pagesize=100&citation_for_view=_zkAFbEAAAAJ:hqOjcs7Dif8C
">Fluctuation–dissipation theorem for thermo-refractive noise</a></p>
<p style="color:tomato;text-align:center;"> One of the first applications of this formalism was to compute thermo-refractive noise in the beamsplitter
of GEO600 gravitational-wave interferometer (at the time, there were questions whether the "mystery noise" had thermo-refractive origin). This was
the masters thesis project of <a href="https://www.linkedin.com/in/bruin-benthem-41323040/?originalSubdomain=nl">Bruin Benthem:</a></p>
<p style="color:blue;text-align:center;"><a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.80.062004">
Thermorefractive and thermochemical noise in the beamsplitter of the GEO600 gravitational-wave interferometer</a></p>
</BODY>
</HTML>