Observation of Q-switching and mode-locking in two-section InAs/InP (100) quantum dot lasers around 1.55 mum.
Observation of Q-switching and mode-locking in two-section InAs/InP (100) quantum dot lasers around 1.55 mum.
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DOI：
10.1364/oe.15.016292
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发表时间：
2007-12
期刊：
影响因子：
3.8
通讯作者：
M. Heck;E. Bente;B. Smalbrugge;Y. Oei;M. Smit;S. Anantathanasarn;R. Nötzel
中科院分区：
文献类型：
--
作者：
M. Heck;E. Bente;B. Smalbrugge;Y. Oei;M. Smit;S. Anantathanasarn;R. Nötzel
报道了在波长约为1.55 μ m的双段量子点激光器中首次观察到的被动锁模现象。通过无背景自相关、rf频谱和实时示波器走线验证了9mm长器件产生的4.6 GHz脉冲。输出脉冲在时间上被拉伸，并以20 ps/nm的值严重上啁啾，与通常在被动锁模半导体激光器中观察到的相反。完整的输出光谱在10nm以上是相干的。从一个7mm长的器件，在一个大的工作范围内观察到q开关。这种激光器是用一种与进一步光子集成兼容的制造技术实现的。这使得激光器成为一个有希望的候选者，例如在复杂的光子芯片中的模式梳发生器。
First observation of passive mode-locking in two-section quantum-dot lasers operating at wavelengths around 1.55 mum is reported. Pulse generation at 4.6 GHz from a 9 mm long device is verified by background-free autocorrelation, RF-spectra and real-time oscilloscope traces. The output pulses are stretched in time and heavily up-chirped with a value of 20 ps/nm, contrary to what is normally observed in passively mode-locked semiconductor lasers. The complete output spectrum is shown to be coherent over 10 nm. From a 7 mm long device Q-switching is observed over a large operating regime. The lasers have been realized using a fabrication technology that is compatible with further photonic integration. This makes the laser a promising candidate for e.g. a mode-comb generator in a complex photonic chip.