Patent ID: 7720114
Filing Date: 2010-05-18
Classification: H01S

Abstract:
1. A mode-lock laser device, comprising: a fiber-based gain medium configured to amplify signal laser pulses in response to a pump light, wherein the signal laser pulses each has a peak portion having a peak polarization and a wing portion having a wing polarization different from the peak polarization; a first polarization controller configured to align the peak polarizations of the signal laser pulses along a first polarization direction; a polarization isolator configured to pass the peak portions of the signal laser pulses having the peak polarizations aligned along the first polarization direction and to block at least portions of the wing portions in the signal laser pulses; and a second polarization controller configured to control the peak polarization of the peak portions of the signal laser pulses received from the polarization isolator, wherein the fiber-based gain medium, the first polarization controller, the polarization isolator, and the second polarization controller in part define a laser cavity, wherein the first polarization controller, the polarization isolator, and the second polarization controller are configured to produce mode locking in the signal laser pulses in the laser cavity.