Zhongkai Zhang, Zunren Lü, Xiaoguang Yang, Hongyu Chai, Lei Meng, Tao Yang, "25 Gb/s directly modulated ground-state operation of 1.3 μm InAs/GaAs quantum dot lasers up to 75°C," Chin. Opt. Lett. 18, 071401 (2020)

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- Chinese Optics Letters
- Vol. 18, Issue 7, 071401 (2020)

Fig. 1. Schematic diagram of the InAs/GaAs QD lasers.

Fig. 2. PL spectra of the one-layer and the eight-layer QDs samples. The inset shows the surface AFM image of the surface QD layer for the eight-layer QD sample.

Fig. 3. P–I curves of the laser at different temperatures from 20°C to 70°C. The inset shows the logarithmic threshold current as a function of temperature.

Fig. 4. Small signal frequency response curves of the InAs/GaAs QD laser, measured at different temperatures.

Fig. 5. Eye diagrams of the InAs/GaAs QD laser at different temperatures.

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