Advanced LIGO subsystems
are the organizational units of the overall project. Follow the links below to view the mission and progress of each subsystem.
Auxiliary Optics | Core Optics |
![]() |
![]() |
Data Acquisition | Data and Computing Systems |
![]() |
![]() |
Facilities Modifications |
Input Optics |
![]() |
![]() |
Interferometer Control |
Pre-Stabilized Laser |
![]() |
![]() |
Seismic Isolation |
Suspensions |
![]() |
![]() |
Subsystem: Input Optics
The Advanced LIGO Input Optics (IO) subsystem conditions and matches the light from the Pre-Stabilized laser to the Core Optics, applying phase modulation, and reducing the frequency, intensity, and geometric fluctuations in the process. The design requirements for the Advanced LIGO Input Optics Subsystem include the requirements for the RF modulation of the light, acquisition and operation of the mode cleaner, mode matching of the light to the interferometer, and beam steering into the interferometer. The University of Florida will provide the IO subsystem. The scope of the IO includes the following tasks and hardware:
Power recycling mirror 3 in HAM 2
Faraday awaiting final install
TGG crystal for Faraday isolator
Faraday isolator before installation
Additional Input Optics Photos
Explore Advanced LIGO
Construction Schedule
Instrumentation and Astrophysics
An Overview of the Upgrades
The International Partnership
Science Impacts
LIGO Technology Transfers
LIGO Scientific Collaboration
Public Outreach
LIGO Magazine
aLIGO Home