Overview

The diagrams below show a conceptual design of the green locking technique

Plans

long term plans	action item list	[:Advanced_Techniques/Green_Locking/action_item_list]
past plans	October 2010	[:Advanced_Techniques/Green_Locking/October_2010]
	November 2010	[:Advanced_Techniques/Green_Locking/November_2010]
	January 2011	[:Advanced_Techniques/Green_Locking/January_2011]

Developer's page

Category	Links
Optical Layout	[attachment:green_optics.png Table] / In-vac
end table	Picture of ETMY table / Picture of ETMX table
Lasers	Lasers (specs, temp settings, etc.)
Optics	ITM wedge effect / Mirror RT measurement
Mode matching	([attachment:modematch_END.png mode matching at end table])
Electronics	[:Advanced_Techniques/Green_Locking/Electronics]
SHG	[:Advanced_Techniques/Green_Locking/SHG]
Doubling Oven	[attachment:PV40.pdf drawing of PV40 oven], [attachment:PVP2.pdf drawing of the base plate PVP2], [attachment:manual_oven.pdf manual for the covesion oven]
Performance	Noise Requirement
Purchase list	[:Upgrade 09/Purchase List/Green Locking]

Links

aLIGO ALS wiki	http://ilog.ligo-wa.caltech.edu:7285/advligo/Arm_Length_Stabilisation
Servo modeling (SimLink)	https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/Green_Locking/Servo_modeling/

Documents

Title	Locations
Description of the optical / servo configuration	https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=6888
Arm Length Stabilization at the 40m prototype	[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=39965 G1100301-v1]

|| ALS at the 40m || [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=38604 G1100127-v2]

-  ⇤ ← Revision 3 as of 2009-08-25 00:24:44 → 
  Size: 618
  Editor: YoichiAso
  Comment:
+   ← Revision 143 as of 2011-09-23 06:24:55 → ⇥
  Size: 2632
  Editor: KiwamuIzumi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-= Green Laser Injection for Arm Pre-Lock =
+## page was renamed from Upgrade 09/GreenLock
<<Anchor(TOP)>>
-Line 3:
+Line 4:
-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
-Line 5:
+Line 7:
-== Basic Concept ==
-Line 7:
+Line 8:
-== 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 ?
-Line 12:
+Line 9:
-=== Noise Sources ===
==== PLL phase noise ====
==== Phase noise from the cavity common mode motion ====
+= Overview =

 The diagrams below show a conceptual design of the green locking technique

   <<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)>>

= Plans =

|| ''' long term plans ''' || ''' action item list ''' ||  [:Advanced_Techniques/Green_Locking/action_item_list] ||
||<|3> ''' past plans ''' ||''' October 2010''' || [:Advanced_Techniques/Green_Locking/October_2010] ||
|| ''' November 2010 '''||[:Advanced_Techniques/Green_Locking/November_2010] ||
||'''January 2011''' || [:Advanced_Techniques/Green_Locking/January_2011] ||
[[BR]]

= Developer's page =
||<:> ''''' Category ''''' ||<:> ''''' Links ''''' ||
||''' Optical Layout '''|| [attachment:green_optics.png Table]  /   [[Optical_Layout|In-vac]] ||
|| ''' end table ''' || [[ETMY_table|Picture of ETMY table]] / [[ETMX_table|Picture of ETMX table]]||
|| ''' Lasers ''' || [[Advanced_Techniques/Green_Locking/Lasers|Lasers (specs, temp settings, etc.)]] ||
|| ''' Optics ''' ||  [[Optical Layout#wedge|ITM wedge effect]] /  [[Upgrade_09/Optics/RTmeasurement|Mirror RT measurement]]||
|| '''  Mode matching ''' || ([attachment:modematch_END.png mode matching at end table]) ||
|| ''' Electronics ''' || [:Advanced_Techniques/Green_Locking/Electronics]||
|| ''' SHG ''' || [:Advanced_Techniques/Green_Locking/SHG] ||
|| ''' Doubling Oven ''' ||  [attachment:PV40.pdf drawing of PV40 oven], [attachment:PVP2.pdf drawing of the base plate PVP2],  [attachment:manual_oven.pdf manual for the covesion oven] ||
|| ''' Performance ''' ||[[Advanced_Techniques/Green_Locking/Noise Requirement|Noise Requirement]] ||
|| ''' Purchase list ''' ||  [:Upgrade 09/Purchase List/Green Locking] ||


= Links =
|| ''' aLIGO ALS wiki ''' || http://ilog.ligo-wa.caltech.edu:7285/advligo/Arm_Length_Stabilisation ||
|| ''' Servo modeling (!SimLink) ''' || https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/Green_Locking/Servo_modeling/ ||

= Documents =
||<:> ''''' Title ''''' ||<:> ''''' Locations ''''' ||
|| ''' Description of the optical / servo configuration ''' || https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=6888  ||
|| ''' Arm Length Stabilization at the 40m prototype ''' || [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=39965 G1100301-v1]||
|| ''' ALS at the 40m ''' || [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=38604 G1100127-v2]