The output of a mode-locked erbium-doped ring fiber laser incorporating a section of a polarization-maintaining (PM) fiber is investigated in both numerical simulations and experiments. With proper inline polarization control, the laser can be set to emit a train of pulses, separated by the differential group delay of the PM section. Repetition rates as high as 500 GHz are experimentally observed. The results provide an added insight into the role of birefringence in mode-locked lasers based on nonlinear polarization rotation.
Bibliographical noteFunding Information:
Manuscript received June 8, 2009; revised July 1, 2009. First published Online July 7, 2009. Current version published July 24, 2009. The work of A. Zadok is supported by a postdoctoral research fellowship from the Center for the Physics of Information at Caltech and by the Rothschild fellowship from Yad-Hanadiv Foundation, Jerusalem, Israel. Corresponding author: A. Zadok (e-mail: avizadok@ caltech.edu).
- Fiber lasers
- Mode-locked lasers
- Picosecond phenomena