Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 40, Issue 14, Pages 4863-4870Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2022.3170459
Keywords
Semiconductor lasers; Laser feedback; Measurement by laser beam; Optical feedback; Optical attenuators; Power lasers; Pump lasers; Laser-self-mixing; optical feedback interfero- metry; adjustable injection intensity; remote sensing; all-fiber
Funding
- National Natural Science Foundation of China [61741501, 61705001, 62105001]
- University Synergy Innovation Program of Anhui Province [GXXT-2020-052]
- Natural Science Foundation of Anhui Province [2008085MF207]
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This article proposes an all-fiber self-mixing velocimeter based on a DBR fiber laser with adjustable injection intensity for the first time. The behavior of fiber lasers in detecting non-cooperative targets under different injection intensities is explored theoretically and experimentally. The results show that the coherence distance of the laser is greatly extended and the intensity noise is significantly suppressed when the ultra-strong injection level is reached. The velocimeter successfully achieves non-cooperative target velocity measurement with a 40 km single-channel transmission distance. It is of great significance in the field of remote sensing due to its simple and compact configuration and adjustable dynamical monitoring range.
In this article, we propose an all-fiber self-mixing velocimeter based on a DBR fiber laser with adjustable injection intensity for the first time, and theoretically and experimentally explore the behavior of fiber lasers in detecting non-cooperative target under different injection intensities. When the ultra-strong injection level is attained, the linewidth of the DBR fiber laser will be narrowed to about 10 kHz, thus extending the coherence distance of laser tremendously. Simultaneously, the intensity noise can be also significantly suppressed. The non-cooperative target velocity measurement with 40 km single-channel transmission distance has been successfully achieved. This velocimeter is shown to be of great significance in the field of remote sensing with simple and compact configuration, and adjustable dynamical monitoring range.
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