Photonic Lantern Adaptive Spatial Mode Control in LMA Fiber Amplifiers using SPGD
Journal Article - Open Access
MASSACHUSETTS INST OF TECH LEXINGTON LEXINGTON United States
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We demonstrate adaptive-spatial mode control ASMC in few-moded double-clad large mode area LMA fiber amplifiers by using an all-fiber based photonic lantern. Three single-mode fiber inputs are used to adaptively inject the appropriate superposition of input modes in a multimode gain fiber to achieve the desired mode at the output. By actively adjusting the relative phase of the single mode inputs, near unity coherent combination resulting in a single fundamental mode at the output is achieved.
- Lasers and Masers
- Fiber Optics and Integrated Optics