An efficient and robust scheme for controlling the states of polarization in a Sagnac interferometric configuration
1 School of Physics and Key Laboratory of Weak Light Nonlinear Photonics, Nankai University Tianjin 300071, China
2 National Laboratory of Solid State Microstructures, Nanjing University - Nanjing 210093, China
Received: 20 December 2013
Accepted: 14 March 2014
We present a convenient, efficient, and robust scheme for controlling the states of polarization and then generating vector fields using a closed-loop Sagnac interferometric configuration. A geometric phase introduced by the wave plates is used to control the phase shift between the two counterpropagating orthogonally linearly polarized fields. A space-variant phase plate substitutes for a spatial light modulator as a space-variant phase device. We have demonstrated experimentally that this scheme has an efficiency beyond 83% converting the input traditional linearly polarized laser into the vector fields. This scheme should also be efficient and reliable for creating the ultrashort-pulsed, high-power, and single-photon vector sources.
PACS: 42.25.-p – Wave optics / 42.25.Ja – Polarization / 42.25.Hz – Interference
© EPLA, 2014