Dark pulse emission in nonlinear polarization rotation-based multiwavelength mode-locked erbium-doped fiber laser
Document Type
Article
Publication Date
1-1-2014
Abstract
We experimentally show dark pulse generation in all-normal dispersion multiwavelength erbium-doped fiber laser (EDFL) with a long cavity of figure-of-eight configuration. The EDFL generates a stable multiwavelength laser with 0.47 nm spacing at 24 mW threshold pump power, while the number of lines obtained increases with the pump power. A dark pulse emission is observed as the pump power is increased above 137 mW, with fundamental repetition rate of 29 kHz and pulse width of 2.7 µs. It is observed that the dark pulse train can be shifted to second-, third-, and fourth-order harmonic dark pulses by carefully adjusting the polarization controller. For the fundamental dark pulse, the maximum pulse energy of 32.4 nJ is obtained at pump power of 146.0 mW.
Keywords
Dark pulse emission, Nonlinear polarization rotation-based, Multiwavelength mode-locked erbium-doped fiber laser
Divisions
fac_eng
Publication Title
Chinese Optics Letters
Volume
12
Issue
11
Publisher
Optical Society of America