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Entry  Thu Aug 5 11:17:18 2010, tara, Notes, NoiseBudget, RIN induced Photo Thermal Noise calculation RINnoise.m
    Reply  Sat Aug 7 22:01:45 2010, rana, Notes, NoiseBudget, RIN induced Photo Thermal Noise calculation 
Message ID: 255     Entry time: Thu Aug 5 11:17:18 2010     Reply to this: 262
Author: tara 
Type: Notes 
Category: NoiseBudget 
Subject: RIN induced Photo Thermal Noise calculation 

I used the result from [1] to calculate frequency noise from thermoelastic and thermorefractive due to RIN.

at 10 Hz, it is about 1.4mHz/rtHz. RIN at 10 Hz used here is 10^-4.

This calculation does not include power fluctuation from RFAM/ pointing stability.

The result will be compared with a simulation from COMSOL (in progress.)

[1] Evans et al, PHYSICAL REVIEW D 78, 102003 (2008)

Attachment 1: RINnoise.m  1 kB  | Hide | Hide all
c=3e8;          %speed of light
lambda = 1064e-9;

Finesse = 1e4;
L=0.2035;       %cavity length

%adjustable parameters
f=10;           %Let's look at 10 Hz
Pin= 10e-3;     % power input 10 mW
RIN= 1e-4;      % RIN level at 10 Hz
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