Improved Range Tunability of DFB Lasers Based on REC Technique Under Injection Current

Xu, Kun; Dai, Pan; Sun, Zhenxing; Lu, Jun; Xiao, Rulei; Su, Zhirui; Fang, Tao; Shi, Yuechun; Chen, Xiangfei

doi:10.1109/jqe.2021.3051426

Cited by 8 publications

(2 citation statements)

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“…Furthermore, we compared the tuning speeds based on TEC and based on the film heater on the submount for one element laser. The wavelength tuning was measured with a Mach-Zehnder interferometer (MZI)-based system [17] . The measured optical intensity fluctuations can indicate the real-time wavelength changes of the laser.…”

Section: Experiments and Discussionmentioning

confidence: 99%

“…Tuning the laser currents will lead to rapid temperature variations of the DFB laser and can finely tune the lasing wavelength. This tuning scheme is simple and achieves a faster tuning speed compared with the traditional TEC-based temperature tuning scheme [17] . For the DFB laser, it is known that the wavelength temperature coefficient is on the order of 0.1 nm/K [18] , and the wavelength injection current coefficient is on the order of 0.01 nm/mA [19] .…”

Section: Principle and Designmentioning

confidence: 99%

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Wideband tunable REC-DFB laser array using thin-film heaters on the submount

et al. 2023

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A wideband wavelength-tunable 4 × 5 distributed feedback (DFB) semiconductor laser array based on the reconstructionequivalent-chirp (REC) technique using a simple tuning scheme is demonstrated. It consists of 20 DFB lasers with 4 × 5 matrix interleaving distributions, two-level cascaded Y-branch optical combiners, and one active semiconductor optical amplifier (SOA), all in-series integrated on one chip. Unlike the traditional thermal-electric cooler (TEC)-based wavelength-tuning scheme, the tunable 4 × 5 REC-DFB laser array achieves a faster and broader continuous wavelength-tuning range using TaN thin-film heaters integrated on the AlN submount. By changing the injection current of the TaN resistor from 0 to 190 mA, the proposed tunable laser achieves a wavelength-tuning range of ∼2.5 nm per channel and a total tuning of over 50 nm. This study opens up new avenues for realizing cost-effective and wide-tuning-range semiconductor lasers.

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Section: Experiments and Discussionmentioning

confidence: 99%

Section: Principle and Designmentioning

confidence: 99%