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= 重力波研究交流会 =
= GW research exchange meeting =

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 * [[gw_talks/what_is|What is GW REM? （重力波研究交流会とは?）]]
 * [[#UsefulLinks | Useful Links ]]
 * [[#HowToAnnouncements | How to receive announcements ]]

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== Upcoming GW-REMs ==
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=== The 129th REM: Mar. 4th, 2025 ===
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 * Time: 14:00-15:00
 * Speaker: Yusuke Okuma (JAXA ISAS/UTokyo)
  * Title: ''"Development of Back-Linked Fabry-Perot Interferometer for Space Gravitational Wave Telescopes"''
   * Abstract:
   {{{
Currently, space-based gravitational wave telescopes are being planned to observe low-frequency gravitational waves. Among them, DECIGO and B-DECIGO, which aim to observe gravitational waves in the 0.1 Hz band, propose a method using Fabry-Pérot cavities. One of the topologies for space-based gravitational wave detectors using cavities is the Back-Linked Fabry-Perot Interferometer (BLFPI).
A BLFPI equips two lasers for each space craft and controls the frequencies of six lasers to satisfy six resonance conditions. This eliminates the need for precise control of the spacecraft's orbit. However, since the gravitational wave signal is obtained by interfering two independent lasers, the signal is contaminated by laser frequency noise.
In a BLFPI, post-processing is performed using the beat signal and the error signal used for frequency control. Through post-processing, laser frequency noise is reduced, and gravitational wave signals distorted by finite control accuracy are restored.
In this study, we constructed a BLFPI setup in the laboratory and conducted experiments to demonstrate the ability to recover gravitational wave signals through post-processing. To achieve this, a method was used to inject simulated gravitational wave signals into the experimental setup using an auxiliary laser. The simulated-gravitational wave signals were then injected into the system, and post-processing was applied to test whether the injected signals could be recovered.

}}}



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== The past GW REM talks ==
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<<Include(gw_talks/archive_121_130)>>

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== Archives for the past talks ==
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 * Most of the archives for the earlier years are written in Japanese (it is a history!).
  . {i} [[gw_talks/archive_121_130|121-130th GW-REM talks (2024-)]] 
  . {i} [[gw_talks/archive_111_120|111-120th GW-REM talks (2023-2024)]] 
  . {i} [[gw_talks/archive_101_110|101-110th GW-REM talks (2019-2022)]] 
  . {i} [[gw_talks/archive_91_100|91-100th GW-REM talks (2017-2019)]] 
  . {i} [[gw_talks/archive_81_90|81-90th GW-REM talks (2016-2017) ]] 
  . {i} [[gw_talks/archive_71_80|71-80th GW-REM talks (2014-2015) ]] 
  . {i} [[gw_talks/archive_61_70|61-70th GW-REM talks (2013-2014) ]] 
  . {i} [[gw_talks/archive_51_60|51-60th GW-REM talks (2012-2013) ]] 
  . {i} [[gw_talks/archive_41_50|41-50th GW-REM talks (2011-2012) ]] 
  . {i} [[gw_talks/archive_31_40|31-40th GW-REM talks (2010-2011) ]] 
  . {i} [[gw_talks/archive_21_30|21-30th GW-REM talks (2009-2010) ]] 
  . {i} [[gw_talks/archive_11_20|11-20th GW-REM talks (2008-2009) ]] 
  . {i} [[gw_talks/archive_1_10|1-10th GW-REM talks (2007-2008) ]] 

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<<Anchor(UsefulLinks)>>
== Useful links ==
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 * [[JGWDoc/HowTo/UpLoadE| How to upload presentation materials to JGW doc database]]

 * [[ZoomHowTo | How to use Zoom]]

 * [[LCGT/Meeting/EVOJ| Use of EVO remote connection system (written in Japanese) ]]

 * [[howtouseezuce| How to join KEK community in eZuce]]

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<<Anchor(HowToAnnouncements)>>
== How to receive the announcements ==
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 . /!\ One has to subscribe to the mailing list called ''gw_comm'' in order to receive our announcement emails. Please ask one of our organizers for subscription. 
 . The organizers can be found in [[gw_talks/what_is|this page]].