TY - JOUR
T1 - Fe2+
T2 - ZnSe and graphene Q-switched singly Ho3+-doped ZBLAN fiber lasers at 3 μm
AU - Zhu, Gongwen
AU - Zhu, Xiushan
AU - Balakrishnan, Kaushik
AU - Norwood, Robert A.
AU - Peyghambarian, N.
PY - 2013
Y1 - 2013
N2 - μm Ho3+-doped ZBLAN fiber lasers passively Q-switched by a Fe2+:ZnSe crystal and graphene saturable absorbers were investigated, respectively. 800 ns pulses at 2.93 μm with an energy of 460 nJ and repetition rate of 105 KHz were obtained when a Fe2+:ZnSe crystal was inserted into a free space collimating and focusing setup. A more compact and reliable Q-switched fiber laser was achieved when a graphene coated fiber mirror was butt-coupled to the angle-cleaved end of the gain fiber. 1.2 μs pulses with an energy of 1 μJ and repetition rate of 100 KHz were achieved. More than 100 mW average output power was obtained at the maximum available pump power. Our experiments demonstrate that both Fe2+:ZnSe crystal and graphene are promising saturable absorbers for pulse generation in the 3 μm wavelength region.
AB - μm Ho3+-doped ZBLAN fiber lasers passively Q-switched by a Fe2+:ZnSe crystal and graphene saturable absorbers were investigated, respectively. 800 ns pulses at 2.93 μm with an energy of 460 nJ and repetition rate of 105 KHz were obtained when a Fe2+:ZnSe crystal was inserted into a free space collimating and focusing setup. A more compact and reliable Q-switched fiber laser was achieved when a graphene coated fiber mirror was butt-coupled to the angle-cleaved end of the gain fiber. 1.2 μs pulses with an energy of 1 μJ and repetition rate of 100 KHz were achieved. More than 100 mW average output power was obtained at the maximum available pump power. Our experiments demonstrate that both Fe2+:ZnSe crystal and graphene are promising saturable absorbers for pulse generation in the 3 μm wavelength region.
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U2 - 10.1364/OME.3.001365
DO - 10.1364/OME.3.001365
M3 - Article
AN - SCOPUS:84884171388
VL - 3
SP - 1365
EP - 1377
JO - Optical Materials Express
JF - Optical Materials Express
SN - 2159-3930
IS - 9
ER -