title: Polarization flipping and hysteresis phenomenon in laser with optical feedback.
abstract: We realize polarization control in He-Ne laser by optical feedback. Polarization flipping occurs when the length of the anisotropy feedback cavity is modulated. The relationship between polarization flipping and phase retardation of birefringence component placed in feedback cavity is built. The hysteresis effect of polarization flipping is observed. We build a system to measure the size of hysteresis loop based on Laser Feedback Interferometer (LFI). The variation of hysteresis loop with phase retardation is measured. The width of hysteresis loop decreases when phase retardation increases.
authors: Department of Opto-electronic Engineering, College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China.
authors: Wenxue
authors: W
authors: Chen
authors: Yongqin
authors: Y
authors: Zhang
authors: Shulian
authors: S
authors: Zhang
authors: Xingwu
authors: X
authors: Long