Non-Radiative Processes In Tunable Ionic Laser Materials

F. Auzel

doi:10.1117/12.950592

18 May 1989 Non-Radiative Processes In Tunable Ionic Laser Materials

F. Auzel

Proceedings Volume 1033, Trends in Quantum Electronics; (1989) https://doi.org/10.1117/12.950592
Event: International Conference on Trends in Quantum Electronics, 1988, Bucharest, Romania

Abstract

Among non-radiative processes which may be encountered in laser materials such as : self-quenching, up-conversion, excited states absorption, multiphonon non-radiative transitions, the last ones may play a particularly important role in vibronic laser materials because the tuning range is directly connected with electron-phonon coupling strength and phonon energies for vibronic radiative transitions. In this lecture we shall discuss two aspects. First we shall try to answer the question: to what extent could the large tuning range also be connected with large coupling strength and phonon energies for non radiative transitions? In such a case, one would have to trade tuning range for quantum efficiency. Which would be a limitation of a basically intrinsic nature in such laser materials. Examples taken from spectroscopic studies and lifetime measurements of Ni²+ and Co²+ doped fluorides and oxydes hosts show that effective phonon modes coupled to radiative and non-radiative transitions are different. In particular in the case of the MgF₂:Ni²+ laser, the mode mediating the tuning range appears to be at a lower energy and with a stronger coupring than the one mediating quantum efficiency trough multiphonon non-radiative decay. A second aspect that shall be discussed is the concentration enhanced electron-phonon coupling that appears to occur in such materials and which could constitute a self-quenching process of a novel type.

Citation Download Citation

F. Auzel "Non-Radiative Processes In Tunable Ionic Laser Materials", Proc. SPIE 1033, Trends in Quantum Electronics, (18 May 1989); https://doi.org/10.1117/12.950592

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available