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|
Subsystem: Pre-Stabilized Laser
The pre-stabilized laser (PSL) provides frequency and intensity stabilized light for the Advanced LIGO interferometers at the specifications required for entrance to the Input Optics (IO) chain. The heart of the PSL is a three-stage laser system.
The PSL contains a number of other components for control and further stabilization of the light, including a pre-mode cleaner, an electro-optic modulator that places sidebands on the main beam, and a resonant optical cavity that serves as a frequency reference.
Photos courtesy AEI-Max Planck/LZH
Additional PSL Photos
Explore Advanced LIGO
Instrumentation and Astrophysics
An Overview of the Upgrades
The International Partnership
LIGO Technology Transfers
LIGO Scientific Collaboration