Laser mode locking using a single-mode-fiber coil with enhanced polarization-dependent loss
Hongbo Jiang, Yun-Peng Huang, Zihao Zhao, Takuma Shirahata, Lei Jin, Shinji Yamashita, Sze Yun Set
Abstract
A laser mode-locking phenomenon based on polarization-dependent loss (PDL) using a passive fiber coil is demonstrated. We propose using a fiber coil operating in low-V-number regime to achieve an enhanced bend-induced PDL and to maintain a reasonable bend loss. A mode-locked thulium doped all-fiber laser is shown using the low-V-number fiber coil. The results indicate that a moderate amount of PDL at 1 dB is sufficient to initiate and sustain a stable CW mode-locking operation. To the best of our knowledge, this is the first demonstration of a CW mode-locked fiber laser based on PDL enabled by a fiber coil.
Topics & Concepts
Materials scienceFiber laserOpticsPolarization-maintaining optical fiberDispersion-shifted fiberElectromagnetic coilThuliumSingle-mode optical fiberLaserMode volumeGraded-index fiberOptoelectronicsOptical fiberFiber optic sensorPhysicsQuantum mechanicsAdvanced Fiber Laser TechnologiesPhotonic Crystal and Fiber OpticsAdvanced Fiber Optic Sensors