Intensity noise reduction in quantum dot comb laser by lower external carrier fluctuations

被引：2
|
作者：
Wang, Wenlu [1 ,2 ]
Ding, Shihao [2 ,3 ]
Wang, Zihao [4 ,5 ,6 ]
He, Feng [1 ]
Zhao, Shiyuan [2 ]
Wang, Ting [4 ,5 ,6 ]
Zhang, Jianjun [4 ,5 ,6 ]
Xu, Xiaochuan [1 ]
Yao, Yong [1 ]
Huang, Heming [2 ]
Grillot, Frederic [2 ,7 ]
Duan, Jianan [1 ]
机构：
[1] Harbin Inst Technol, Natl Key Lab Laser Spatial Informat, Guangdong Prov Key Lab Integrated Photon Elect Chi, Shenzhen 518055, Peoples R China
[2] Inst Polytech Paris, Telecom Paris, Palaiseau 518055, France
[3] Shenzhen Technol Univ, Coll Integrated Circuits & Optoelect Chips, Shenzhen 518118, Peoples R China
[4] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[5] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[6] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
[7] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA
来源：
OPTICS LETTERS | 2024年 / 49卷 / 17期
基金：
中国国家自然科学基金;
关键词：
MODE-LOCKING; BAND;
D O I：
10.1364/OL.532012
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
This work investigates the impact of carrier noise induced by an external current source on the linewidth enhancement factor (LEF) and relative intensity noise (RIN) of a 100 GHz quantum dot fourth-order colliding-pulse mode-locked laser (MLL), driven by a normal pump with Gaussian-distributed carrier sequences and a quiet pump with sub-Poissoniandistributed carrier sequences. The results indicate that under a normal pump, the LEFs are approximately zero for reverse saturable absorber (SA) bias voltages ranging from 0 to 2.5 V, and the laser achieves a RIN as low as -156 dB/Hz. When using a quiet pump, both the LEF and RIN are reduced across all SA bias conditions, particularly at low reverse SA bias voltages. Specifically, the LEF decreases by up to 0.58 at 0 V, and the average RIN spectrum is reduced by more than 3 dB at the same voltage. This work provides a straightforward approach for the development and optimization of multi-channel light sources for dense wavelength division multiplexing (DWDM) technologies with low optical noise. (c) 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
引用
收藏
页码：5007 / 5010
页数：4
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