Abstract
Using the rate equation, several optical methods of characterizing the threshold of a laser diode (LD) were analyzed. The thresholds determined by all methods are consistent if the spontaneous-emission-coefficient (β) is small. If β<0.05, the thresholds obtained by different methods are different. Especially, for micro-nano LDs with a large β, these methods are starting to become inaccurate. However, the d S/dH is a relatively accurate method to characterize threshold of these LDs compared to other methods. The effects of the spontaneous-emission-lifetime (τsp) and the photon-lifetime (τp) on thresholds were analyzed. The exact functions between the threshold and the β, τsp and τp were obtained.
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This work has been supported by the National Natural Science Foundation of China (Nos.61804010, 61874004 and 11204209), and the Natural Science Foundations of Tianjin City (No.17JCYBJC16200).
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Jia, Kp., Zhang, L. & Feng, Lf. Accurate dependences of spontaneous emission factor, lifetime, and photon lifetime on threshold current. Optoelectron. Lett. 16, 103–107 (2020). https://doi.org/10.1007/s11801-020-9087-0
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DOI: https://doi.org/10.1007/s11801-020-9087-0