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首页> 外文期刊>Journal of Zhejiang university science >Design and analysis of a mode-hop-free tunable laser based on etched diffraction grating
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Design and analysis of a mode-hop-free tunable laser based on etched diffraction grating

机译：基于蚀刻衍射光栅的无模跳可调激光器的设计与分析

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摘要

A novel semiconductor laser which can achieve mode-hop-free tuning is proposed. The device consists of an etched diffraction grating (EDG) as a dispersive element to provide the mode selection function and an active waveguide to provide optical gain for the laser. The slab waveguide region of the EDG contains a tuning section covered by an electrode to inject a tuning current, and thus changes the refractive index. Mode-hop-free tuning is achieved by specially designing the shape of the tuning section, so that the tuning rate of the central wavelength reflected by the EDG and the tuning rate of the resonant wavelength of the laser cavity are equal. An optimized tuning section shape is designed to obtain the largest tuning range within a limited current range. Numerical simulation is presented to demonstrate the mode-hop-free tuning operation.
机译：提出了一种新型的可实现无模跳调谐的半导体激光器。该设备由一个蚀刻的衍射光栅（EDG）作为色散元件提供模式选择功能，并由一个有源波导为激光器提供光学增益。 EDG的平板波导区域包含一个被电极覆盖的调谐区，以注入调谐电流，从而改变折射率。通过专门设计调谐部分的形状来实现无模式跳变调谐，从而使EDG反射的中心波长的调谐速率和激光腔谐振波长的调谐速率相等。设计了优化的调谐部分形状，以在有限的电流范围内获得最大的调谐范围。进行了数值模拟，以演示无模跳的调谐操作。

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