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

Pan Dai; Zhuo Chen; Zhenxing Sun; Hantian Ge; Ji Dai; Jun Lu; Feng Wang; Rulei Xiao; Hua Tong; Rongrong Dou; Xiangfei Chen

doi:10.3788/COL202321.011406

Journals >Chinese Optics Letters >Volume 21 >Issue 1 >Page 011406 > Article

Chinese Optics Letters
Vol. 21, Issue 1, 011406 (2023)

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

Pan Dai¹, Zhuo Chen¹, Zhenxing Sun¹, Hantian Ge², Ji Dai¹, Jun Lu¹, Feng Wang^1、**, Rulei Xiao¹, Hua Tong¹, Rongrong Dou³, and Xiangfei Chen^1、*

Author Affiliations

¹Key Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Institute of Optical Communication Engineering, and Nanjing University-Tongding Joint Laboratory for Large-Scale Photonic Integrated Circuits, Nanjing University, Nanjing 210023, China

²School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

³School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China

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DOI: 10.3788/COL202321.011406 Cite this Article Set citation alerts

Pan Dai, Zhuo Chen, Zhenxing Sun, Hantian Ge, Ji Dai, Jun Lu, Feng Wang, Rulei Xiao, Hua Tong, Rongrong Dou, Xiangfei Chen. Wideband tunable REC-DFB laser array using thin-film heaters on the submount[J]. Chinese Optics Letters, 2023, 21(1): 011406 Copy Citation Text

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Abstract

A wideband wavelength-tunable

4 \times 5

distributed feedback (DFB) semiconductor laser array based on the reconstruction-equivalent-chirp (REC) technique using a simple tuning scheme is demonstrated. It consists of 20 DFB lasers with

4 \times 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 \times 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

\sim 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.

Keywords

distributed feedback laser array reconstruction-equivalent-chirp technique thin-film heater integrated on the submount tunable laser wide tuning range