Inside-outside coupling in a two-photon correlated spontaneous emission laser
Conference Paper
Overview
Overview
abstract
By fully subsuming a leaky cavity inside a perfect large (infinitely large in the limit) cavity it is possible to define the quasi-modes of the former cavity for linearly superposing the true modes of the latter cavity. Since the true modes of the larger cavity describe the radiation field both inside and outside the smaller leaky cavity, a rigorous description of the input, output, and intracavity field quasi-modes of a leaky cavity is obtained. This input-output formalism has been applied to a two-photon correlated spontaneous emission laser (CEL), which consists of coherently pumped cascade three-level atoms interacting with a single mode of the radiation field inside a high-Q cavity. In the long measured time limit, the spectrum of squeezing in the phase quadrature is found to be an inverted Lorentzian. Without one-photon resonance or initial atomic coherences involving the middle level, maximum intracavity squeezing (50% in the phase quadrature) transforms to nearly perfect extracavity phase squeezing. With exact one-photon resonance and initial atomic coherences involving the intermediate level, nearly perfect intracavity phase squeezing amounts to hardly any squeezing outside the cavity.
