Differences between revisions 15 and 19 (spanning 4 versions)

Electronics

outline

80MHz LIGO VCO box is used to readout the frequency of the beat signal precisely.

attachment:SR620.png

A Silicon photodiode with the diameter of 10mm is used. To have a fast response up to about 1MHz -150V is applied onto the photo diode.

attachment:RFPD_tf.png

attachment:RFPDnoise.png

Here is the noise model for the RFPD using liso. attachment:liso_RFPD.png

Advanced_Techniques/Green_Locking/Electronics (last edited 2017-04-20 01:58:36 by RanaadhikariATligoDOTorg)

-  ⇤ ← Revision 15 as of 2010-11-24 23:40:02 → 
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+   ← Revision 19 as of 2010-11-24 23:47:50 → ⇥
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  Editor: KiwamuIzumi
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== wideband RFPD for green PLL ==
 . A Silicon photodiode with the diameter of 10mm is used. To have a fast response up to about 1MHz -150V is applied onto the photo diode.
The schematic is available on [https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/GreenLockingBroadBandPD svn]
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-== wideband RFPD for green PLL ==
 . A Silicon photodiode with the diameter of 10mm is used. 
To have a fast response up to about 1MHz -150V is applied onto the photo diode.
+=== frequency response ===
attachment:RFPD_tf.png
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- . The schematic is available at https://nodus.ligo.caltech.edu:30889/svn/trunk/alberto/40mUpgrade/RFsystem/RFPDs/GreenLockingBroadBandPD
+=== noise performance ===
attachment:RFPDnoise.png

Here is the noise model for the RFPD using liso.
attachment:liso_RFPD.png
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+[[BR]]
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== Power Supply and Cables ==
=== HV cables (-150V) for photodiode bias ===
=== 15V and 24V lines ===