40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  ATF eLog  Not logged in ELOG logo
 List  |  Find  |  Login  |  Help 
Entry  Fri Jul 30 13:38:56 2010, Dmass, Laser, Doubling, Mode Matching for Ovens OvenMM.pdf
    Reply  Tue Aug 3 21:43:40 2010, Dmass, Laser, Doubling, Mode Matching for Ovens 
       Reply  Tue Aug 3 23:15:14 2010, Dmass, Laser, Doubling, Mode Matching for Ovens 
          Reply  Wed Aug 4 17:21:56 2010, Alastair, Laser, Doubling, Mode Matching for Ovens 
          Reply  Sat Aug 7 19:04:07 2010, Dmass, Laser, Doubling, Mode Matching for Ovens 
Message ID: 901     Entry time: Wed Aug 4 17:21:56 2010     In reply to: 900
Author: Alastair 
Type: Laser 
Category: Doubling 
Subject: Mode Matching for Ovens 

Sorry about the camera.  I was using it and didn't put it back in the drawer.  It's in there now.


Quote:

Quote:

Quote:

I redid the mode matching into the ovens to account for the dispersion of the material affecting the Rayleigh range (like this)

I used Zr = L_crystal / 2 / n

 Scratched in favor of the following:

f=100mm at 0.47 m

f=75mm at 0.758 m

This works well with the current table layout.

taking Zin at PMC to be 371^2*pi/1.064 um

and Zoven to be 1.8*10000/2 um, about 36-37 inches from the PMC

 

I put these mode matching lenses in for the ovens...I realigned the Mach Zehnder with no focusing lenses for the PDs and was able to see fringes on the PD.. I can't find the lab camera and my iPhone died, so no picture.

Without trying very hard, I was able to get fringes with a min of 2.32V and a max of 4.88V on the scope, in green. When I get back from LLO I will be going straight to phase noise spectra.

 

ELOG V3.1.3-