Multimode Mamyshev Oscillator
Henry Haig, Pavel Sidorenko, Anirban Dhar, Nilotpal Choudhury, Ranjan, Sen, Demetrios Christodoulides, Frank Wise

TL;DR
This paper introduces a novel spatiotemporally mode-locked Mamyshev oscillator capable of generating diverse multimode states, with control over modal content, enabled by nonlinear interactions and spatial filtering, marking the first exploration of such mode-locking.
Contribution
It presents the first demonstration of spatiotemporal mode-locking in a Mamyshev oscillator, exploring multimode states and their control through cavity design and nonlinear effects.
Findings
Multiple multimode mode-locked states observed
Control over modal content achieved via cavity design
Spatiotemporal mode-locking enabled by nonlinear interactions
Abstract
We present a spatiotemporally mode-locked Mamyshev oscillator. A wide variety of multimode mode-locked states, with varying degrees of spatiotemporal coupling, are observed. We find that some control of the modal content of the output beam is possible through the cavity design. Comparison of simulations to experiments indicates that spatiotemporal mode-locking is enabled by nonlinear intermodal interactions and spatial filtering, along with the Mamyshev mechanism. This work represents a first exploration of spatiotemporal mode-locking in an oscillator with the Mamyshev saturable absorber.
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