Differences between revisions 10 and 14 (spanning 4 versions)

Balanced Homodyne Detection

Requirements

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

Modelling/Noise Budget

Some BHD modeling is done in the OptimalGWextraction repo here.

Polarization BHD

Some thoughts on polarization BHD (LIGO-G1802013)
Polarization BHD notes

-  ⇤ ← Revision 10 as of 2017-12-23 03:42:41 → 
  Size: 1487
  Editor: KevinkunsATligoDOTorg
  Comment:
+   ← Revision 14 as of 2019-04-05 00:51:26 → ⇥
  Size: 1039
  Editor: KevinkunsATligoDOTorg
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-=== Noise Budget ===
+= Balanced Homodyne Detection =
 Line 3:
-==== Simple BHD ====

The ipython notebook [[https://github.com/CaltechExperimentalGravity/OptimalGWextraction/blob/master/PonderSqueeze/BHD/SimpleBHD.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.

==== BHD with Mode Cleaners ====

The ipython notebook [[https://github.com/CaltechExperimentalGravity/OptimalGWextraction/blob/master/PonderSqueeze/BHD/BHD_OMC.ipynb|located here]] describes the noise in a balanced homodyne detector with mode cleaners for the signal (OMC) and local oscillator (LMC) as shown below. A static version of the notebook with plots and output included can be viewed [[attachment:BHD_OMC.html|here]].

{{attachment:BHD_OMC_OptickleLayout.png}}

==== BHD detection of a simple Michelson ====

==== BHD detection of the full 40m Interferometer ====
-Line 25:
+Line 12:
+==== Modelling/Noise Budget ====
 * Some BHD modeling is done in the OptimalGWextraction repo [[https://github.com/CaltechExperimentalGravity/OptimalGWextraction/tree/master/PonderSqueeze/BHD|here]].

==== Polarization BHD ====
 * [[https://dcc.ligo.org/LIGO-G1802013|Some thoughts on polarization BHD (LIGO-G1802013)]]
 * [[attachment:OMC.pdf|Polarization BHD notes]]

==== Other Links ====
 * [[https://wiki.ligo.org/AIC/BHD_A_plus|A+ BHD wiki]]
 * [[https://wiki.ligo.org/AIC/BHD_MIT_WS|MIT A+ BHD workshop wiki]]