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We demonstrated oxide‐confined 850‐nm verticalcavity surface‐emitting lasers (VCSELs) with a two‐dimensional petal‐shaped holey structure composed of several annular‐sectorshaped holes. Four types of devices with different hole numbers were designed and fabricated. The measured results showed that the larger hole number was beneficial to purifying the lasing mode, and realizing the single‐mode operation...
In this paper we report on laser diode end‐pumped single longitudinal mode and optical bistability Tm,Ho:YLF lasers at room temperature. The maximal output power of single longitudinal mode can reach 106 mW by using only a 250 μ m thick solid etalon. The single longitudinal mode laser can be used as a seed laser for laser lidar systems. Furthermore, for the first time, the phenomenon of low threshold...
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