Photonics Research, 2017, 5 (3): 03000256, Published Online: Oct. 9, 2018
Fiber laser for on-demand mode generation in 1550 nm band
Abstract
Transverse mode characteristics of a laser are related to a variety of interesting applications. An on-demand mode solid laser in the 1064 nm band was proposed previously. In this paper, we provide a fiber laser for on-demand modes in the 1550 nm band to prescribe the pure and high-quality emission of a higher-order transverse laser mode, based on a simple construction with one spatial light modulator (SLM) and a single-mode erbium-doped fiber (SM-EDF). The SLM is designated to generate the desired higher-order mode and separate the higher-order mode and the fundamental mode. The fundamental mode oscillates in the fiber ring laser, and therefore the SM-EDF can be pumped with a single-mode 980 nm laser, no matter what higher-order mode is prescribed. In this proof-of-principle experiment, high-quality higher-order modes are observed from LP 01 to LP 105 . Stable emission and real-time switching between modes can be easily realized by altering the phase on the SLM. In addition, the propagation of the LP 01 , LP 11 , LP 21 , and LP 02 modes from the fiber laser is also demonstrated in a four-mode few-mode fiber.
Chenghui Tian, Song Yu, Shanyong Cai, Mingying Lan, Wanyi Gu. Fiber laser for on-demand mode generation in 1550 nm band[J]. Photonics Research, 2017, 5(3): 03000256.