Overview and Conceptual design

plans

developer's page

Optical Layout	([attachment:green_optics.png Table]/ In-vac)
end table	ETM / end table
end table
wedge effect	ITM wedge effect
in-vac	Periscopes for beam steering from PR3/SR3 transmissions to the PSL viewport
Mode matching	([attachment:modematch_END.png mode matching at end table])
Electronics	[:Upgrade 09/GreenLock/Electronics]
sensing and control	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 89 as of 2010-07-13 03:20:39 → 
  Size: 3530
  Editor: KiwamuIzumi
  Comment:
+   ← Revision 95 as of 2010-10-05 20:11:06 → ⇥
  Size: 1767
  Editor: KiwamuIzumi
  Comment:
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-= Arm Length Stabilization using green laser beams =
+<<Anchor(TOP)>>
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- <<Anchor(TOP)>>  
 . attachment:green_man.jpg
+ . attachment:god_of_green.png
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-   . We are developing a technique of Arm Length Stabilization (ALS) for advanced LIGO. The technique employs two auxiliary green lasers at each end of the arm. Basically these lasers are able to sense the displacement of the each arm independently on the main laser, eventually make full lock acquisition of advanced interferometer more robust and reliable.
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-[[BR]]
[[BR]]
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-''' Table of Contents '''
+= Overview and Conceptual design =
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-<<TableOfContents([2])>>
+   <<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 =
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+= developer's page =
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+Line 20:
--------

== Designs and Plans ==
=== time line ===
 * The time line describes where we are now and where we go. B) [[Upgrade 09/GreenLock/timeline|time line]]
+||''' Optical Layout '''|| ([attachment:green_optics.png Table]/ In-vac) ||
|| ''' end table ''' || [[Upgrade 09/GreenLock/end table|ETM / end table]] ||
|| ''' end table ''' || <<ImageLink(endtable.jpg,Upgrade 09/GreenLock/end_table)>> ||
|| ''' wedge effect ''' ||  [[Upgrade 09/Optical Layout#wedge|ITM wedge effect]] ||
|| ''' in-vac ''' ||    [[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]) ||
|| ''' Electronics ''' || [:Upgrade 09/GreenLock/Electronics] ||
|| ''' sensing and control ''' || [[Upgrade 09/GreenLock/Control Information|jump to Control Information]] ||
-Line 26:
+Line 31:
-=== Conceptual design ===
 * 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]


==== Green Preliminary 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)>>



[[BR]]

-------
== Installation status ==

 * '''Design and Purchasing Lists'''
  * Optical design / [[Upgrade 09/Purchase List/Green Locking|item list]]
  * Electronics / control design / [[Upgrade 09/Purchase List/Green Locking|item list]]
  * [[Upgrade 09/Purchase List/Green Locking|Purchase list]]
 * '''Detailed considerations'''
  * 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]]
   * PSL viewport modification (viewport cover / tube / PSL box / periscope on the PSL table)
   * PSL table
   * Laser & SHG specs --- power, polarization, Xtals
    . '' - references''
    . [1] G.D.Boyd and D.A. Kleinman, [http://jap.aip.org/japiau/v39/i8/p3597_s1 "Parametric interaction of Focused Gaussian Light Beams", J.A. Phys. 39, 3597 (1968)]

    . [2] C. Zhang, Y.Qin and Y.Zhu,  [http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-33-7-720 "Perfect quasi-phase matching for the third-harmonic generation using focused Gaussian beams",Opt. Lett. 33, 720 (2008)]

  * Main optics specs (review)
  * Mode matching ([attachment:modematch_END.png mode matching at end table])
  * Green generation
   . [attachment:manual_oven.pdf manual for the covesion oven]
  * Expected performance / noise / control system range
  *  B) [[Upgrade 09/GreenLock/Electronics|Electronics]]
 
  * Digital servo / operation
  * Alignment (initial / fine / automatic)


 .  B) [[Upgrade 09/GreenLock/Control Information|jump to Control Information]]

[[BR]]

-------


== Links ==
 .  {i} [[Upgrade 09/GreenLock/Noise Requirement|jump to Noise Requirement]]

 . {i} aLIGO ALS wiki    http://ilog.ligo-wa.caltech.edu:7285/advligo/Arm_Length_Stabilisation
 . {i} Description of the optical / servo configuration [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=6888 LIGO DCC]
 . {i} Servo modeling (!SimLink) [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/Green_Locking/Servo_modeling/ 40mSVN]

 . {i} [#TOP back to the page top] attachment:god_of_green.png
+= 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]] ||