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= Green Laser Injection for Arm Pre-Lock = ## page was renamed from Upgrade 09/GreenLock
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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




= 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]

  • attachment:god_of_green.png

Overview

  • The diagrams below show a conceptual design of the green locking technique
    • green_vertex_preliminary_design.png green_ETM_preliminary_design.png

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]

BR

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]

Advanced_Techniques/Green_Locking (last edited 2015-06-23 03:44:00 by EricquinteroATligoDOTorg)