We demonstrate the generation of 92 nm (−3 dB bandwidth) flat-topped ultrabroad stimulation emission from a chirped InAs/InP quantum dot (QD) laser. A greatly enhanced bandwidth of the gain spectrum is achieved, which is attributed to the additionally broadened quantum dot energy levels utilizing gradually changed height of QDs in the stacked active layers. The laser exhibits a maximum output power of 0.35 W under pulsed conditions, and the average spectral power density of above 3.8 mW/nm is obtained. The ultrabroad lasing spectrum in the wavelength interval of 1.49–1.61 μm covering S-C-L bands makes such a laser potentially useful as an optical source for various applications being compatible with silica fibers.
Flat-topped ultrabroad stimulated emission from chirped InAs/InP quantum dot laser with spectral width of 92 nm
Feng Gao, Shuai Luo, Hai-Ming Ji, Feng Xu, Zun-Ren Lv, Xiao-Guang Yang, Ping Liang, Tao Yang; Flat-topped ultrabroad stimulated emission from chirped InAs/InP quantum dot laser with spectral width of 92 nm. Appl. Phys. Lett. 16 May 2016; 108 (20): 201107. https://doi.org/10.1063/1.4952433
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