H
H. J. Zhang
Researcher at Shandong University
Publications - 142
Citations - 3252
H. J. Zhang is an academic researcher from Shandong University. The author has contributed to research in topics: Laser & Q-switching. The author has an hindex of 30, co-authored 137 publications receiving 3007 citations. Previous affiliations of H. J. Zhang include Shandong University of Science and Technology.
Papers
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Journal ArticleDOI
Graphene mode-locked femtosecond laser at 2 μm wavelength
Jan Ma,Guoqiang Xie,Peng Lv,Wenlan Gao,Peng Yuan,Liejia Qian,Haohai Yu,H. J. Zhang,Jun Wang,Dingyuan Tang +9 more
TL;DR: It is experimentally demonstrated a passively mode-locked femtosecond laser by using a graphene-based saturable absorber mirror (graphene SAM) in the spectral region of 2 μm.
Journal ArticleDOI
Graphene saturable absorber for Q-switching and mode locking at 2 μm wavelength [Invited]
Guoqiang Xie,Jan Ma,P. Lv,Wenlan Gao,Peng Yuan,Liejia Qian,Haohai Yu,H. J. Zhang,Jiyang Wang,Dingyuan Tang +9 more
TL;DR: Graphene saturable absorber mirror (SAM) was successfully fabricated by transferring large-size graphene flake on dielectric coating mirror as discussed by the authors, and the graphene transferred on the mirror was tested by Raman spectrum measurement and scanning electron microscope imaging.
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Dual-wavelength synchronously mode-locked Nd:CNGG laser.
Guoqiang Xie,Dingyuan Tang,H. Luo,H. J. Zhang,Haohai Yu,Jun Wang,Xutang Tao,Minhua Jiang,Liejia Qian +8 more
TL;DR: A dual-wavelength synchronously mode-locked Nd:CNGG laser based on the semiconductor saturable absorber mirror technique, achieved simultaneously on two gain bands of the crystal that have a central wavelength separation of 2.4 nm.
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Passive Q-switching and Q-switched mode-locking operations of 2 μm Tm:CLNGG laser with MoS 2 saturable absorber mirror
TL;DR: In this article, a Tm-doped calcium lithium niobium gallium garnet (Tm:CLNGG) laser was experimentally demonstrated with MoS2 as saturable absorber.
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Security enhancement of double-random phase encryption by amplitude modulation
TL;DR: This work introduces a technique to break down this linearity with an undercover amplitude modulation in the encryption scheme and can significantly enhance the security of the system.