Picture of person typing on laptop with programming code visible on the laptop screen

World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

Explore

Recoil-induced effects in a bidirectional ring laser

Piovella, N and Villa, V and Bonifacio, R and McNeil, B W Jlib/metafield:join_name.lastRobb, G R M (2001) Recoil-induced effects in a bidirectional ring laser. European Physical Journal D: Atomic, Molecular, Optical and Plasma Physics, 17 (3). pp. 365-384. ISSN 1434-6060

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

We present a theoretical study of a bidirectional ring laser in which the active medium is a cold atomic vapor. A novel feature of our analysis is the self-consistent description of the atomic motion due to recoil. It is shown that the evolution of the two count er-propagating fields within the cavity can be very different from that when recoil is neglected. We present an analytical study of the stationary unidirectional and bidirectional emission solutions and an analysis of their stability for a given average atomic velocity and Gaussian atomic velocity distribution. It is shown that the unidirectional emission solution is unstable if either the average velocity or the velocity distribution width is larger than a specific threshold value. If the mode frequency is resonant with the atoms. the symmetric bidirectional emission solution is stable. If the mode frequency is blue-detuned, the laser emits, unidirectional pulses alternately in opposite directions. An initially inhomogeneously broadened medium in a blue-detuned ring laser experiences a continuous self-cooling process. which may reduce the atomic temperature down to the Doppler cooling limit. A simple analytical model interpreting the effect is presented.