Experimental Investigation on the Mode Characteristics of an Excited-State Quantum Dot Laser under Concave Mirror Optical Feedback-Reference-Cited by-同舟云学术

Experimental Investigation on the Mode Characteristics of an Excited-State Quantum Dot Laser under Concave Mirror Optical Feedback

Published:2023-02-04 Issue:2 Volume:10 Page:166
ISSN:2304-6732
Container-title:Photonics
language:en
Short-container-title:Photonics

Author:

Zheng Yanfei¹²,Xia Guangqiong¹²^ORCID,Lin Xiaodong¹²,Wang Qingqing¹²,Wang Hongpei³,Jiang Cheng³,Chen Hongmei³,Wu Zhengmao¹²^ORCID

Affiliation:

1. School of Physical Science and Technology, Southwest University, Chongqing 400715, China

2. Chongqing Key Laboratory of Micro & Nano Structure Optoelectronics, Southwest University, Chongqing 400715, China

3. School of Electronic and Information Engineering, Qingdao University, Qingdao 266071, China

Abstract

In this paper, we experimentally investigated the mode configuration of an excited-state quantum dot laser (ESQDL) under concave mirror optical feedback, and the influences of the feedback strength on the mode characteristics were analyzed. The results showed that after introducing concave mirror optical feedback, some longitudinal modes of the excited-state (ES) existing in a free-running ESQDL could be suppressed. When the feedback strength increased to a certain extent, the ground-state (GS) emission occurred and co-existed with the ES emission. By further increasing the feedback strength, all the longitudinal modes of the ES emission were suppressed, and only the longitudinal modes of the GS emission could be observed. As a result, the emission-state switching from the ES to GS emission was realized. When the ESQDL was biased at a larger current, the feedback strength required to achieve emission-state switching was stronger.

Funder

National Natural Science Foundation of China

Postgraduates’ Research and Innovation Project of Chongqing

Publisher

MDPI AG

Subject

Radiology, Nuclear Medicine and imaging,Instrumentation,Atomic and Molecular Physics, and Optics

Link

https://www.mdpi.com/2304-6732/10/2/166/pdf

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