Random distributed feedback fiber laser based on semiconductor optical amplifier

Abstract

The invention relates to a random distributed feedback fiber laser based on a semiconductor optical amplifier, belonging to the technical field of fiber lasers. The random distributed feedback fiber laser comprises an FC/APC (Ferrule Connector/Angled Polished Connector) optical fiber connector A, a fiber bragg grating, a semiconductor optical amplifier, a long-distance single mode fiber and an FC/APC optical fiber connector B, wherein the fiber bragg grating is used for providing strong feedback, the long-distance single mode fiber is used for providing random distributed rayleigh scattering feedback, and the semiconductor optical amplifier is used for providing gain amplification; and when the overall gain in the laser can counteract the total loss, the pumping threshold is reached and the random laser output is realized; and the driving current of the semiconductor optical amplifier is increased continuously to obtain stable laser output finally. The random distributed feedback fiber laser has the characteristics of low pumping threshold value, high conversion efficiency, simple structure and convenient operation, and can be suitable in the fields such as non-linear optics, remote optical fiber sensing, telecommunication and the like.

Description

technical field [0001] The invention specifically relates to a randomly distributed feedback fiber laser based on a semiconductor optical amplifier, and belongs to the technical field of fiber lasers. Background technique [0002] As a novel miniature laser, the random laser plays an irreplaceable role in many application fields, such as the light source of the flat panel display, the light source of the microstructure optical fiber, the signal light of the fluid detection, etc.; in addition, it has a compact structure and unique functions , has aroused widespread concern. In the field of nonlinear optics, optical fiber sensing and optical fiber communication, randomly distributed feedback laser has a wide range of potential applications, so it is considered as an important new light source. [0003] In recent years, randomly distributed feedback fiber lasers have become a hot topic in the research field at home and abroad. In April 2010, Turitsyn et al. used intermediate ...

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Problems solved by technology

Chinese Patent Announcement No. CN102354900A, dated February 15, 2012, titled "A Randomly Distributed Feedback Fiber Laser" discloses a double-pumped fiber laser with randomly distributed feedback, using a longer erbium-doped fiber, and the cost is relatively low. high

Chinese Patent Announcement No. CN103378538A, dated October 30, 2013, titled "A Semi-Open Cavity Low-Threshold Random Fiber Laser" discloses the use of a single pump and a semi-open cavity to realize a random laser, but the structure requires A separate optical pump source provides the excitation

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