Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Laser-related properties of chromium-and neodymium-doped gadolinium scandium aluminum garnet (Cr:Nd:GSAG)

Not Accessible

Your library or personal account may give you access

Abstract

The spectroscopic, lasing, and thermal properties of chromium- and neodymium-doped gadolinium scandium aluminum garnet (Cr:Nd:GSAG) are reported. The Judd–Ofelt parameters, radiative lifetime, and branching ratios were determined, and an effective emission cross-section value of 0.92 × 10−19 cm2 was derived at 1.06 μm from our spectroscopic measurements. The temporal behavior of the Cr3+ fluorescence intensity agreed with the Inokuti–Hirayama model for the chromium–neodymium energy-transfer mechanism, which invokes a static dipole-dipole interaction and no migrational energy transfer. Under identical flash-lamp-pumping conditions the measured pumping efficiency of Cr:Nd:GSAG for threshold lasing is nearly equal to the pumping efficiency of codoped gadolinium scandium gallium garnet (Cr:Nd:GSGG). From the threshold-lasing data, an effective emission cross section of 0.7 × 10−19 cm2 for Cr:Nd:GSAG was independently determined, as well as a value of 1.3 × 10−19 cm 2 for Cr:Nd:GSGG. The normalized heating parameter χ, defined as the heat deposited per unit stored energy, experimentally ranges from 2.1 to 2.7, depending on the effective emission cross-section value. Our calculated value of χ is 1.9 ± 0.3. Based on our heating-efficiency measurements, calculated Cr:Nd:GSAG thermal lensing values are ~2.1–2.6 D/kW, which indicates a thermally induced focal length that is weaker than that of Nd:YAG by approximately a factor of 2 at the same output power. Finally, the benefits and trade-offs of laser-diode pumping are discussed.

© 1994 Optical Society of America

Full Article  |  PDF Article
More Like This
Spectroscopic, optical, and thermomechanical properties of neodymium- and chromium-doped gadolinium scandium gallium garnet

W. F. Krupke, M. D. Shinn, J. E. Marion, J. A. Caird, and S. E. Stokowski
J. Opt. Soc. Am. B 3(1) 102-114 (1986)

Thermo-optic properties of gadolinium garnet laser crystals

C. S. Hoefer, K. W. Kirby, and L. G. DeShazer
J. Opt. Soc. Am. B 5(11) 2327-2332 (1988)

Temperature dependence of the 1.06-µm stimulated emission cross section of neodymium in YAG and in GSGG

Alexandra Rapaport, Shengzhi Zhao, Guohua Xiao, Andrew Howard, and Michael Bass
Appl. Opt. 41(33) 7052-7057 (2002)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (7)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (16)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved