Digital wavelength-selected DBR laser
Digital wavelength-selected DBR laser
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数字波长选择 DBR 激光器
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
D. Robbins
中科院分区：
文献类型：
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作者：
N. Whitbread;A. J. Ward;L. Ponnampalam;D. Robbins
可宽调谐的单片InP激光器原则上可以覆盖掺铒光纤放大器窗口中的一个或另一个。这些窗口跨越约40- 50 nm的波长范围。然而，通过电流注入到光栅部分中可以实现的折射率的变化被限制为对应于大约10- 20 nm波长的大约1-2%，因此需要一些进一步的机制来扩展调谐范围。在本文中，我们提出了一种新的多节，数字超模DBR激光器（DS-DBR），可以控制在一个简单的，准数字的方式。通过将电流施加到前触点之一来粗选波长，以形成增强的反射峰并选择总调谐范围的子带。施加到后光栅接触的电流允许在该范围内调谐，并且相位部分允许微调控制。通过依次选择前触点，可以访问器件的整个调谐范围。我们将介绍该设备的概述以及一些简单的建模，以显示该设备将如何执行。随后将简要描述的制造和一套全面的实验结果，包括RIN和线宽测量。
Widely tunable monolithic InP lasers can, in principle, cover one or other of the Er-doped fibre amplifier windows. These windows span wavelength ranges of around 40-50nm. However, the change in refractive index that can be achieved by current injection into a grating section is limited to about 1-2% corresponding to around 10-20nm in wavelength, so some further mechanism is required to extend the tuning range. In this paper, we present a new multi-section, digital supermode DBR laser (DS-DBR) that can be controlled in a simple, quasi-digital manner. The wavelength is coarsely selected by applying current to one of the front contacts to form an enhanced reflection peak and select a sub-band of the total tuning range. Current applied to the rear grating contact allows tuning within that range and a phase section allows fine tuning control. By selecting front contacts in turn, the full tuning range of the device can be accessed. We will present an overview of the device together with some simple modelling to show how the device will perform. This will be followed by a brief description of the fabrication and a comprehensive set of experimental results including RIN and linewidth measurements.