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Tunable twin-guide laser diodes for wide wavelength tuning at 1.55 μm

机译：可调谐双导激光二极管，可在1.55μm的宽波长范围内调谐

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摘要

Widely tunable lasers are generally considered as key components of future optical communication networks. However, practically all widely tunable lasers that have been fabricated so far suffer from drawbacks, like elaborate calibration procedures that are required for each specific device, low output powers, and limited direct modulation capabilities. To overcome the aforementioned issues, the sampled or superstructure grating tunable twin-guide or (S)SG-TTG laser diode has been suggested recently. In this paper we will focus on the operation principle, the fabrication, and performance of the first widely tunable twin-guide laser diodes. The devices operate at ～ 1.55 μm wavelength. By means of Vernier effect tuning, the continuous tuning range of ～ 2 nm is extended to an overall tuning range of 28 nm. Within this tuning range, five supermodes are useable and can be continuously tuned without any mode hops. The side-mode suppression ratio remains between 25 and 37 dB over the whole tuning range. Without any tuning currents applied, a maximum output power of 12 mW has been achieved.
机译：宽可调激光器通常被认为是未来光通信网络的关键组件。但是，到目前为止，几乎所有已制造的可广泛调谐的激光器都存在缺陷，例如每个特定设备都需要复杂的校准程序，低输出功率和有限的直接调制能力。为了克服上述问题，最近已经提出了采样或上部结构的光栅可调谐双波导或（S）SG-TTG激光二极管。在本文中，我们将重点介绍第一个可广泛调谐的双导激光二极管的工作原理，制造和性能。这些器件在〜1.55μm的波长下工作。通过游标效应调谐，将〜2 nm的连续调谐范围扩展到28 nm的总调谐范围。在此调整范围内，可以使用五个超模式，并且可以连续进行调整而无需任何模式跳变。在整个调谐范围内，旁模抑制比保持在25至37 dB之间。在不施加任何调谐电流的情况下，已实现了12 mW的最大输出功率。

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