Journal
OPTICAL ENGINEERING
Volume 60, Issue 4, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.60.4.046103
Keywords
gold nanospheres; saturable absorber; passively Q-switched laser
Categories
Funding
- General Project of Scientific Research Program of Beijing Municipal Education Commission [KM201811232007]
- Support Program of Great Wall Scholars in Beijing [CITTCD20190323]
- Beijing Youth Talent Support Program
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High-quality gold nanospheres (Au NPs) were transferred to a sapphire substrate, and their saturable absorption properties were studied using the balanced twin-detector measurement technique. The results indicate that Au NPs are promising candidates as saturable absorbers for mid-infrared laser pulse generation.
High-quality gold nanospheres (Au NPs) were transferred to a sapphire substrate. The balanced twin-detector measurement technique was used to study the saturable absorption properties of the Au NPs. With the as-prepared Au NPs as a saturable absorber (SA), an efficient passively Q-switched laser was realized at 1.93 mu m. Under an absorbed pump power of 4.5 W, a maximum output power of 400 mW was obtained with the shortest pulse width of 410 ns and repetition rate of 126 kHz. The results indicate that Au NPs are promising candidates as SAs for mid-infrared laser pulse generation. (C) 2021 Society of Photo-Optical Instrumentation Engineers (SPIE)
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