64-channel InP-based laser array with lateral α-Si reconstruction equivalent chirp gratings

Chenyan Tang; Mingjin Wang; Wenzhen Liu; Yingqiu Dai; Shengmin Zhou; Jiahao Si; Zhaozheng Yi; Dongxu Xin; Wanhua Zheng

doi:10.1117/12.2686556

27 November 2023 64-channel InP-based laser array with lateral α-Si reconstruction equivalent chirp gratings

Chenyan Tang, Mingjin Wang, Wenzhen Liu, Yingqiu Dai, Shengmin Zhou, Jiahao Si, Zhaozheng Yi, Dongxu Xin, Wanhua Zheng

Proceedings Volume 12761, Semiconductor Lasers and Applications XIII; 127610L (2023) https://doi.org/10.1117/12.2686556
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Multiple-wavelength laser arrays play important roles in various applications, such as optical communications, optical interconnections, as well as light detection and ranging. A 64-channel laser array with a wavelength grid of 0.8 nm at C+L band is demonstrated. The lasing modes in InP-based multiple quantum wells are built based on lateral α-Si Reconstruction Equivalent Chirp (REC) gratings. By introducing an equivalent λ/4 phase-shift in each lateral α-Si REC grating, the mode degeneracy is eliminated. The equivalent λ/4 phase-shift region has no influences on the zero-order peak but generates a sharp peak in the first order peak, selecting the lasing wavelength. When the seed grating period in lateral α-Si REC grating is fixed at 250 nm and the sampling periods are changed from 6.356 μm to 39.162 μm for 64 channels, the lateral α-Si REC gratings successfully select 64 wavelengths in C+L band at 0.8 nm wavelength interval. Utilizing the sampling periods with several hundred nanometers in the first order resonant peak, we can adjust a sequence of REC gratings more accurate than the seed grating periods with several nanometers in the zero-order resonant peak. The laser in 64-channel laser array with 0.8 nm channel spacing has a threshold of 42 mA, and output power of 74.5 mW. Our work proposes a novel method of multiple-wavelength laser arrays for hetero-integration, which could provide a potential way for the development of Wavelength Division Multiplexing (WDM) system, optical interconnection inside the data center, and photonic switching.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Chenyan Tang, Mingjin Wang, Wenzhen Liu, Yingqiu Dai, Shengmin Zhou, Jiahao Si, Zhaozheng Yi, Dongxu Xin, and Wanhua Zheng "64-channel InP-based laser array with lateral α-Si reconstruction equivalent chirp gratings", Proc. SPIE 12761, Semiconductor Lasers and Applications XIII, 127610L (27 November 2023); https://doi.org/10.1117/12.2686556

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KEYWORDS

Optical gratings

L band

Optical interconnects

Quantum channels

Wavelength division multiplexing

Matrices

Optical switching

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