Differences between revisions 3 and 18 (spanning 15 versions)

GOALs of this month

1. to stabilize the main PSL laser using the green beat note signal through the actuation on the MC length and use the X arm as a stable reference
2. to measure the stability of the beat note and compared with the IR PDH signal
3. to answer the question that the green locking is stable enough to hand off the servo to IR

Action Items

Indicators
attachment:green.png complete	attachment:orange.png intermediate state	attachment:red.png nothing happened	attachment:black.png gave up

BR BR

Step 1. X arm alignment for IR
action	description	status	notes
setup DC_PD at an available port	to find a fringe	attachment:green.png	attachment:help.png put Thorlabs PDA255 at AS
align BS, ITMX and ETMX	to have TEM00 flash	attachment:green.png	put a camera at ETMX_TRANS
place TRANS_MON_PD		attachment:red.png
hook it up TRANS_MON to ADC	`c1iscex`	attachment:green.png
make a simple mod/demod system	to lock the IR without `c1lsc`	attachment:red.png	attachment:help.png
feeding back the signal to MCL(?)	to lock the IR	attachment:red.png	attachment:help.png
add a LOCKIN module into `c1sus` and `c1iscex`	for A2L	attachment:red.png
A2L for IR	for precise alignment	attachment:red.png	touch PZT1 and PZT2 ?

Step 2. Re-alignment of green
action	description	status	notes
change beam axis	steer the mirrors at X end	attachment:green.png	attachment:help.png
rearrange the optical setup at X end	if necessary	attachment:green.png
lock the green to X arm		attachment:green.png
overlap the green beam axis to the IR	using A2L	attachment:red.png

Step 3. Beat note detection
action	description	status	notes
finalize the setup at PSL table	Electronics, cables and etc.,..	attachment:orange.png
alignment of optics at PSL table		attachment:green.png
temperature tuning of the lasers		attachment:green.png	attachment:help.png

Step 4. Digital control to stabilize X arm
action	description	status	notes
connect VCO signal to ADC	hook up it to `c1ioo`	attachment:red.png	attachment:help.png
simulink model refinement		attachment:red.png
DAQ setting		attachment:red.png
feedback to ETMX		attachment:red.png
medm screen		attachment:red.png

Advanced_Techniques/Green_Locking/January_2011 (last edited 2012-01-03 23:02:44 by localhost)

-  ⇤ ← Revision 3 as of 2011-01-06 20:02:40 → 
  Size: 359
  Editor: KiwamuIzumi
  Comment:
+   ← Revision 18 as of 2011-01-15 03:43:58 → ⇥
  Size: 3161
  Editor: KiwamuIzumi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-= Plan for January =
== GOAL of this month ==
 . ''' to stabilize the arm displacement using the green beat note '''
+= GOALs of this month =
 . '''1. to stabilize the main PSL laser using the green beat note signal through the actuation on the MC length and use the X arm as a stable reference '''
 . '''2. to measure the stability of the beat note and compared with the IR PDH signal '''
 . '''3. to answer the question that the green locking is stable enough to hand off the servo to IR '''
 Line 8:
+= Action Items =
-Line 10:
+Line 12:
+[[BR]]
[[BR]]
||||||||<tablestyle="width: 80%">'''''Step 1.  X arm alignment for IR '''''||
||<:>''''' action ''''' ||<:>''''' description ''''' ||<:> ''''' status ''''' ||<:> ''''' notes '''''||
|| setup DC_PD at an available port || to find a fringe ||<:>attachment:green.png || attachment:help.png  put Thorlabs PDA255 at AS   ||
|| align BS, ITMX and ETMX ||to have TEM00 flash ||<:>attachment:green.png  || put a camera at ETMX_TRANS ||
|| place TRANS_MON_PD || ||<:>attachment:red.png || ||
|| hook it up TRANS_MON to ADC|| {{{ c1iscex }}}||<:>attachment:green.png || ||
|| make a simple mod/demod system || to lock the IR without {{{c1lsc }}}||<:>attachment:red.png ||attachment:help.png ||
|| feeding back the signal to MCL(?) || to lock the IR ||<:>attachment:red.png || attachment:help.png ||
|| add a ''LOCKIN'' module into {{{c1sus}}} and {{{c1iscex}}}|| for A2L ||<:>attachment:red.png || ||
|| A2L for IR || for precise alignment ||<:>attachment:red.png || touch PZT1 and PZT2 ?||
||||||||||
||||||||<tablestyle="width: 80%">'''''Step 2. Re-alignment of green '''''||
||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:> ''''' notes '''''||
|| change beam axis ||steer the mirrors at X end ||<:>attachment:green.png || attachment:help.png ||
|| rearrange the optical setup at X end || if necessary ||<:>attachment:green.png || ||
|| lock the green to X arm || ||<:>attachment:green.png || ||
|| overlap the green beam axis to the IR || using A2L ||<:>attachment:red.png || ||
||||||||||
||||||||<tablestyle="width: 80%">'''''Step 3. Beat note detection '''''||
||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:> ''''' notes '''''||
|| finalize the setup at PSL table || Electronics, cables and etc.,.. ||<:>attachment:orange.png ||  ||
|| alignment of optics at PSL table || ||<:>attachment:green.png || ||
|| temperature tuning of the lasers || ||<:>attachment:green.png || attachment:help.png ||
||||||||||
||||||||<tablestyle="width: 80%">'''''Step 4. Digital control to stabilize X arm '''''||
||<:>''''' action ''''' ||<:>''''' description ''''' ||<:>''''' status ''''' ||<:>''''' notes '''''||
||connect VCO signal to ADC || hook up it to {{{ c1ioo }}} ||<:>attachment:red.png|| attachment:help.png ||
||simulink model refinement || ||<:>attachment:red.png|| ||
||DAQ setting || ||<:>attachment:red.png || ||
|| feedback to ETMX || ||<:>attachment:red.png|| ||
||medm screen || ||<:>attachment:red.png|| ||