Intensity fluctuations of erbium-doped whispering gallery mode lasers (Conference Presentation)

Patrice Féron; Jean-Baptiste Ceppe; Yannick Dumeige; Michel S. Mortier

doi:10.1117/12.2253635

21 April 2017 Intensity fluctuations of erbium-doped whispering gallery mode lasers (Conference Presentation)

Patrice Féron, Jean-Baptiste Ceppe, Yannick Dumeige, Michel S. Mortier

Proceedings Volume 10090, Laser Resonators, Microresonators, and Beam Control XIX; 1009003 (2017) https://doi.org/10.1117/12.2253635
Event: SPIE LASE, 2017, San Francisco, California, United States

Abstract

Micro spherical resonators have attracted significant attention in recent years due to their interesting optical properties and the range of applications for which they can be used. Most of the publications dedicated to micro spherical Laser are devoted to lasing effects in different materials where the spectral properties of the emission depends on (i) the choice of dopant (e.g. Er³⁺, Yb³⁺, Tm³⁺) and (ii) the host matrix (e.g. silica, fluoride, phosphate or telluride glass) in which the dopant is embedded. Yet, the dynamics of theses Lasers are still to be studied. This paper shows experimental results on the amplitude fluctuations of a Whispering Gallery Mode Laser, also known as relative intensity noise (RIN). It gives information about the dynamics inside the cavity, such as photon lifetime, effective pumping rate and noise sources. We use as active medium Er³⁺ doped fluoride ZBLALiP glass and also industrial IOG-1 Yb³⁺- Er³⁺ co-doped phosphate glass. Theses glasses are well adapted to the development of micro spherical Laser operating in the infrared region, in particular with emission wavelengths falling respectively in the C-band and C+L band. We have observed that the RIN can provide insurance about the emission of the Laser. Moreover, we have shown that a single-mode emission comes with the presence of multiple harmonics of the relaxation frequency, which is the signature of a Laser with high noise levels. In this particular case, the second and higher orders of intensity fluctuations cannot be neglected any longer in the small-signal analysis.

Conference Presentation

Citation Download Citation

Patrice Féron, Jean-Baptiste Ceppe, Yannick Dumeige, and Michel S. Mortier "Intensity fluctuations of erbium-doped whispering gallery mode lasers (Conference Presentation)", Proc. SPIE 10090, Laser Resonators, Microresonators, and Beam Control XIX, 1009003 (21 April 2017); https://doi.org/10.1117/12.2253635

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KEYWORDS

Glasses

Spherical lenses

Erbium

Infrared radiation

Laser resonators

Optical properties

Resonators

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