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The ipython notebook [[https://github.com/CaltechExperimentalGravity/OptimalGWextraction/blob/master/PonderSqueeze/40mOptickleModel/40mBHD.ipynb|located here]] describes the noise in a simple balanced homodyne detector consisting only of a local oscillator, a beamsplitter, and two photodiodes. The noise is computed with an Optickle model and a heuristic analytic description is given.
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1. Displacement noise of OMC/LMC mirrors
1. Scatter loss in mirrors
1. Cavity design: triangle, quad ring, quad zig-zag (reference the new OMC paper from Koj)
1. Laser amplitude / frequency noise including DC offsets in various other lock points and motions to simulate bilinear noise
1. Oscillator noise: AM / FM
1. Aux length noise: MICH/PRC/ SRC
1. Req. on offsets/asymmetries: arm finesse, arm reflectivity, mass imbalance of ETMs		  1. Displacement noise of OMC/LMC mirrors
 1. Scatter loss in mirrors
 1. Cavity design: triangle, quad ring, quad zig-zag (reference the new OMC paper from Koj)
 1. Laser amplitude / frequency noise including DC offsets in various other lock points and motions to simulate bilinear noise
 1. Oscillator noise: AM / FM
 1. Aux length noise: MICH/PRC/ SRC
 1. Req. on offsets/asymmetries: arm finesse, arm reflectivity, mass imbalance of ETMs

Noise Budget

Simple BHD

The ipython notebook located here describes the noise in a simple balanced homodyne detector consisting only of a local oscillator, a beamsplitter, and two photodiodes. The noise is computed with an Optickle model and a heuristic analytic description is given.

BHD detection of a simple Michelson

BHD detection of the full 40m Interferometer

Requirements

  1. Displacement noise of OMC/LMC mirrors
  2. Scatter loss in mirrors
  3. Cavity design: triangle, quad ring, quad zig-zag (reference the new OMC paper from Koj)
  4. Laser amplitude / frequency noise including DC offsets in various other lock points and motions to simulate bilinear noise
  5. Oscillator noise: AM / FM
  6. Aux length noise: MICH/PRC/ SRC
  7. Req. on offsets/asymmetries: arm finesse, arm reflectivity, mass imbalance of ETMs

Balanced Homodyne Detection (last edited 2020-04-29 17:41:39 by JonathanrichardsonATligoDOTorg)