Aim at the bottom

Directly exciting the lower level of a laser transition for additional functionality

Nikolas Iwanus, Darren D. Hudson, Tomonori Hu, Stuart D. Jackson*

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We introduce the concept of directly exciting the lower level of a laser transition in addition to the upper laser level for the provision of new possibilities for light emission from a fiber. In a first demonstration, using diode laser light at 1150 and 1950 nm, we respectively excite the upper and lower laser level of the 5I65I 7 transition (2.9 μm) of Ho3+-doped ZBLAN, demonstrating a power-scalable arrangement that can switch between free-running and superluminescent spectral output. The spectral composition of the gain-switched pulse derived from modulating the upper laser level pump light depends entirely on the degree of lower laser level excitation at 1950 nm.

Original languageEnglish
Pages (from-to)1153-1156
Number of pages4
JournalOptics Letters
Volume39
Issue number5
DOIs
Publication statusPublished - 1 Mar 2014
Externally publishedYes

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