Dissipative coupling, dispersive coupling and their combination in the cavity-less opto-mechanical systems

Abstract

The approach of variational measurement is applied to the cavity-less dissipative coupling (when test mass displacement is changing transmittance of a single mirror). The result obtained is compared to the cavity-less dispersive coupling (when the mass of displaced single mirror is changing the phase in reflected wave). These types of coupling are compared for ponderomotive squeezing. In addition, the cavity-less variant of combined dissipative and dispersive coupling is explored. It is established that combined coupling results in a stable optical rigidity even in case of a single pump. Finally, it is confirmed that variational measurement can be applied to combined coupling.

9 pages, 4 figures