ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Compression of the self-Q-switching in semiconductor disk lasers with single-layer graphene saturable absorbers |
Yu Zhen-Hua (于振华), Tian Jin-Rong (田金荣), Song Yan-Rong (宋晏蓉) |
Institute of Information Photonics Technology and College of Applied Sciences, Beijing University of Technology, Beijing 100124, China |
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Abstract We demonstrate the first use of single layer graphene for compressing self-Q-switching pulses in semiconductor disk lasers. The gain region of the semiconductor disk laser used InGaAs quantum wells with a central wavelength of 1030 nm. Due to self saturable absorption of the quantum wells, the disk laser emitted at the self-Q-switching state with a pulse width of 13 μs. By introducing the single layer graphene as a saturable absorber into the V-shaped laser cavity, the pulse width of the self-pulse was compressed to 2 μs with a lower pump power of 300 mW. As the pump power was increased, multiple pulses with the pulse width of 1.8 μs appeared. The compression factor was about 7.2.
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Received: 26 March 2014
Revised: 28 April 2014
Accepted manuscript online:
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PACS:
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42.55.Px
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(Semiconductor lasers; laser diodes)
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81.05.ue
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(Graphene)
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Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CB922404), the National Natural Science Foundation of China (Grant No. 61177047), and the Key Project of the National Natural Science Foundation of China (Grant No. 61235010). |
Corresponding Authors:
Song Yan-Rong
E-mail: yrsong@bjut.edu.cn
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Cite this article:
Yu Zhen-Hua (于振华), Tian Jin-Rong (田金荣), Song Yan-Rong (宋晏蓉) Compression of the self-Q-switching in semiconductor disk lasers with single-layer graphene saturable absorbers 2014 Chin. Phys. B 23 094206
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