Differences between revisions 3 and 94 (spanning 91 versions)

Arm Length Stabilization using green laser beams

attachment:god_of_green.png

Overview and Conceptual design

Optical Layout ([attachment:green_optics.png Table]/ In-vac)
ETM / end table ITM wedge effect
- Periscopes for beam steering from PR3/SR3 transmissions to the PSL viewport
Mode matching ([attachment:modematch_END.png mode matching at end table])
Electronics
jump to Control Information

links

aLIGO ALS wiki	http://ilog.ligo-wa.caltech.edu:7285/advligo/Arm_Length_Stabilisation
Description of the optical / servo configuration	[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=6888 LIGO DCC]
Servo modeling (SimLink)	[https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/Green_Locking/Servo_modeling/ 40mSVN]
manual for the doubling oven	[attachment:manual_oven.pdf manual for the covesion oven]
noise requirements	[:Upgrade 09/GreenLock/Noise Requirement]
purchase list	Purchase list

-  ⇤ ← Revision 3 as of 2009-08-25 00:24:44 → 
  Size: 618
  Editor: YoichiAso
  Comment:
+   ← Revision 94 as of 2010-10-05 20:06:49 → ⇥
  Size: 1609
  Editor: KiwamuIzumi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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-= Green Laser Injection for Arm Pre-Lock =
+<<Anchor(TOP)>>
= Arm Length Stabilization using green laser beams =
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-We plan to install green lasers, which are phase locked to the PSL laser, at each end station to pre-lock the arm cavities before the lock acquisition.
+   . attachment:god_of_green.png
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-== Basic Concept ==
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-== Noise Requirement ==
I'd say the arm cavity length should not change more than 1/100 of the resonance width in the time scale of 10sec.[[BR]]
For this to be fulfilled, the RMS fluctuation of the cavity length must be suppressed below 1e-11m level.[[BR]]
Does this make sense ?
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-=== Noise Sources ===
==== PLL phase noise ====
==== Phase noise from the cavity common mode motion ====
+= Overview and Conceptual design =

   <<ImageLink(green_vertex_preliminary_design.png,Upgrade 09/GreenLock/Preliminary design for the vertex,height=200)>>
   <<ImageLink(green_ETM_preliminary_design.png,Upgrade 09/GreenLock/Preliminary design for the end,height=200)>>




  Optical Layout ([attachment:green_optics.png Table]/ In-vac)
  [[Upgrade 09/GreenLock/end table|ETM / end table]] <<ImageLink(endtable.jpg,Upgrade 09/GreenLock/end_table)>>
  [[Upgrade 09/Optical Layout#wedge|ITM wedge effect]]
   [[Upgrade 09/Optical Layout|Periscopes for beam steering from PR3/SR3 transmissions to the PSL viewport]]

  Mode matching ([attachment:modematch_END.png mode matching at end table])
 

  [[Upgrade 09/GreenLock/Electronics|Electronics]]
 
 
 
  [[Upgrade 09/GreenLock/Control Information|jump to Control Information]]
  


= links =
|| ''' aLIGO ALS wiki ''' || http://ilog.ligo-wa.caltech.edu:7285/advligo/Arm_Length_Stabilisation ||
|| ''' Description of the optical / servo configuration ''' || [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=6888 LIGO DCC] ||
|| ''' Servo modeling (!SimLink) ''' || [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/Green_Locking/Servo_modeling/ 40mSVN] ||
|| ''' manual for the doubling oven ''' ||   [attachment:manual_oven.pdf manual for the covesion oven] ||
|| ''' noise requirements ''' ||[:Upgrade 09/GreenLock/Noise Requirement] ||
|| ''' purchase list ''' ||  [[Upgrade 09/Purchase List/Green Locking|Purchase list]] ||