LIGO Seminar

Optical losses and the optical power requirements in the traditional and the intracavity readout topologies of laser gravitational-wave detectors

F. YA. Khalili, Physics, Moscow State University,

Optical losses limit the degree of available squeezing in laser gravitational-wave detectors, forcing to use more circulating optical power to increase the sensitivity. In principle, the optical power problem could be solved by using the intracavity readout topology of gravitational-wave detectors. However, the optical losses in the small-scale local readout interferometer necessary for this topology result in the very similar requirement for the circulating optical power. The partial remedy for this problem was proposed by C.Caves in his seminal work [C.Caves, Phys. Rev. D 23, 1693 (1981)], namely, the use of thesecond (anti)squeezer, which returns the outgoing quantum state of the interferometer to the non-squeezed (coherent) quantum state.

We plan to broadcast this talk using SeeVogh.

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For more information, please contact Sydney Meshkov by email at [email protected].