Overview and Conceptual design

plans

	action item list	[:Upgrade 09/GreenLock/action_item_list]
monthly plan	October 2010	[:Upgrade 09/GreenLock/October_2010]
	November 2010	[:Upgrade 09/GreenLock/November_2010]
	December 2010	[:Upgrade 09/GreenLock/December_2010]

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
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

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]

-  ⇤ ← Revision 72 as of 2010-04-27 22:42:32 → 
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-= Arm Length Stabilization by injecting green laser beams from the arm  ends =
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{i} aLIGO ALS wiki    http://ilog.ligo-wa.caltech.edu:7285/advligo/Arm_Length_Stabilisation

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-------

== Plan ==
=== time line ===
 * [[Upgrade 09/GreenLock/timeline|time line]] describes where we are now and where we go.


=== 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)>>
+   . attachment:god_of_green.png
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-=== Development roadmap ===
 * '''End table arrangement'''
  * NPRO placement / optical assembly at the end
+= Overview and Conceptual design =
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-  * SHG at the end table
  * Control system placement
  * Coarse alignment to the cavity
  * Fine alignment
  * Lock of the green beam to the cavity
 * '''At the PSL table'''
  * SHG at the PSL table
 * '''Digital control'''
  * Virtual Green lock by RCG
  * GPIB interfaces
 * '''Vertex tank optical arrangement'''
  * In-vac steering (PO transmission / Periscope / Mirrors)
  * Vertex phase noise measurement
   * Electronics placement
   * Control system implementation
 * '''Performance evaluation'''
  * f_noise of green beam / PDH performance
+   <<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)>>
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-  * Relative f_noise between the PSL green and the Arm transmitted green
  * ALS performance
 * '''Sophistication of the scheme'''
  * Automatic handing off scripts
+= plans =
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-  * Ready-to-go panels for AdvLIGO
  * Automatic alignment of the green beam
  * ---
  * Green Michelson for precise ETM calibration
+|| || ''' action item list ''' ||  [:Upgrade 09/GreenLock/action_item_list] ||
||<|15> ''' monthly plan ''' ||'''October 2010''' || [:Upgrade 09/GreenLock/October_2010] ||
||'''November 2010''' || [:Upgrade 09/GreenLock/November_2010] ||
||'''December 2010''' || [:Upgrade 09/GreenLock/December_2010] ||
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-  * Absolute length / mode spacing measurement by green''' '''
+[[BR]]

= developer's page =

||''' 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]] ||
|| ''' 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]] ||
-Line 69:
+Line 39:
-== Detailed design ==
 * '''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
  * Digital servo / operation
  * Alignment (initial / fine / automatic)



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


== Noise Requirements ==
  .  B) [[Upgrade 09/GreenLock/Noise Requirement|jump to Noise Requirement]]
+= 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] ||