Patent ID: 8311411
Filing Date: 2012-11-13
Classification: G02B,G02F,H04J

Abstract:
1. A polarization stabilizing device for stabilizing the state of polarization of an optical radiation, comprising: a first and a second birefringent element having fixed polarization eigenstates and operable to provide in sequence to the optical radiation respectively first and second controllable phase retardation (Φ a detecting system apt to generate at least a first monitor signal representative of an optical power of a first polarized portion of the optical radiation output from the second birefringent element; a third and a fourth birefringent element having fixed polarization eigenstates and operable to provide respectively third and fourth controllable phase retardations (Φ a further detecting system apt to generate a second monitor signal representative of an optical power of a further polarized portion of the optical radiation output from the fourth birefringent element; and a controller connected for receiving said first monitor signal from the detecting system and for supplying first and second control signals (φ the controller being configured: