In:
Micromachines, MDPI AG, Vol. 14, No. 4 ( 2023-04-17), p. 864-
Abstract:
We carry out a detailed investigation of TMI mitigation by pump modulation based on multiple current waveforms in a fiber laser oscillator. Compared with continuous wave (CW), the modulation of various waveforms, including sinusoidal wave, triangular wave, and pulse wave with a duty cycle of 50% and 60%, can increase the TMI threshold. The average output power of a stabilized beam is boosted via the adjustment of phase difference between the signal channels. The TMI threshold is increased to 270 W under a modulation of pulse wave (duty cycle: 60%) with a phase difference of 440 μs, where the beam quality is 1.45. This threshold can be further improved by adding groups of pump LDs and drivers, which is a promising approach for beam stabilization of high-power fiber lasers.
Type of Medium:
Online Resource
ISSN:
2072-666X
Language:
English
Publisher:
MDPI AG
Publication Date:
2023
detail.hit.zdb_id:
2620864-7