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Article overview
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Narrow bandwidth Q-switched Erbium-doped fiber laser based on dynamic saturable absorption filtering effect | | Zengrun Wen
; Kaile Wang
; Shuangcheng Chen
; Xinyuan Qi
; Baole Lu
; Jintao Bai
; | | Date: |
21 Jul 2020 | | Abstract: | We proposed a narrow spectral bandwidth Erbium-doped fiber (EDF) laser
Q-switched by a homemade saturable dynamic induced grating (SDIG) which is
introduced via reforming the structure of a fiber saturable absorbers FSA with
a piece of EDF and a fiber Bragg grating. The SDIG integrates both saturable
absorption and spectral filtering effect simultaneously, which was confirmed
through theoretical analysis and experimental results for the first time, to
the best of our knowledge. Further study verified that the spectral width of
the Q-switched emissions is decided by the length of the SDIG and the input
power of the pump source. The Q-switched pulse with the narrowest spectral
width of about 29.1 pm achieved in this work is the narrowest bandwidth pulse
in the domain of the FSA Q-switched fiber lasers when the length of SDIG and
pump power are 20 cm and 250 mW, respectively. Our method provides a simple way
to obtain the Q-switched pulses with narrow bandwidths, which have promising
applications for nonlinear frequency conversion, Doppler LIDAR and coherent
beam combinations. | | Source: | arXiv, 2007.10583 | | Services: | Forum | Review | PDF | Favorites | |
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