Control of Widely Tunable Lasers With High-Q Resonator as an Integral Part of the Cavity

作者：Komljenovic Tin; Liu Songtao; Norberg Erik; Fish Gregory A; Bowers John E

来源：Journal of Lightwave Technology, 2017, 35(18): 3934-3939.

DOI：10.1109/JLT.2017.2724202

• Cavity resonators
• laser tuning
• photonic integrated circuits
• semiconductor lasers

We have designed and fabricated widely tunable semiconductor laser with a high-Q resonator as an integral part of the laser cavity. Wide tuning is realized by utilizing the Vernier effect of two rings with slightly different circumferences. A third ring with considerably larger circumference, and, consequently, higher Q is introduced inside the laser cavity. We study the control of such a laser and show that it is straightforward provided that the integrated laser has on-chip monitor photodiodes. This further shows the benefits of full integration as inclusion of additional monitor photodetectors is straightforward with no extra processing steps. As the complexity of photonic-integrated chips increases, the inclusion of more monitor photodetectors for control is necessary.

• 出版日期2017-9-15