Spectral shaping of an ultrafast ytterbium fiber laser via a passive intracavity optical filter: a simple and reliable route to sub-45 fs pulses

Autor:	Nicholas D. Cooper, Uyen M. Ta, Melanie A. R. Reber
Rok vydání:	2023
Předmět:	Electrical and Electronic Engineering Engineering (miscellaneous) Atomic and Molecular Physics and Optics
Zdroj:	Applied Optics. 62:2195
ISSN:	2155-3165 1559-128X
DOI:	10.1364/ao.486245
Popis:	We investigate the use of passive intracavity optical filters for controlling the laser output spectrum of a polarization-mode-locked, ultrafast ytterbium fiber laser. The overall lasing bandwidth is increased or extended by strategic choice of the filter cutoff frequency. Overall laser performance, including pulse compression and intensity noise, is investigated for both shortpass and longpass filters with a range of cutoff frequencies. The intracavity filter not only shapes the output spectra, but also provides a route for overall broader bandwidths and shorter pulses in ytterbium fiber lasers. These results demonstrate that spectral shaping with a passive filter is a useful tool to routinely achieve sub-45 fs pulse durations in ytterbium fiber lasers.
Databáze:	OpenAIRE
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