Comparative studies for Cr4+:YAG crystal and AlGaInAs semiconductor used as a saturable absorber in Q-switched Yb-doped fiber lasers.
We demonstrate comparative studies for Cr(4+):YAG crystal and AlGaInAs quantum-well (QW) used as a saturable absorbers in passively Q-switched Yb-doped fiber lasers. Both saturable absorbers were designed to be possessed of nearly the same initial transmission. Under a pump power of 24 W, the average output powers were up to 14.4 W and 13.8 W obtained with the AlGaInAs QWs and with the Cr(4+):YAG crystal, respectively. The maximum pulse energies obtained with the Cr(4+):YAG crystal and with the AlGaInAs QWs were found to be 0.35 mJ and 0.45 mJ, respectively.
Huang
J Y
JY
Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, R.O.C.
Zhuang
W Z
WZ
Huang
W C
WC
Su
K W
KW
Hu
C
C
Huang
K F
KF
Chen
Y F
YF
D000535:Aluminum / Q000737:chemistry; D001151:Arsenic / Q000737:chemistry; D002857:Chromium / Q000737:chemistry; D003460:Crystallization; D004867:Equipment Design; D005708:Gallium / Q000737:chemistry; D007204:Indium / Q000737:chemistry; D007834:Lasers; D009991:Oscillometry; D012666:Semiconductors; D015018:Ytterbium / Q000737:chemistry*
D007204:Indium; D002857:Chromium; D005708:Gallium; D000535:Aluminum; D015018:Ytterbium; D001151:Arsenic