Alphan Sennaroglu,1
Umit Demirbas,1
Sarper Ozharar,1,*
and Fatih Yaman1,†
1Departments of Physics and Electrical–Electronics Engineering, Laser Research Laboratory, Koç University, Rumelifeneri, Sariyer, Istanbul 34450 Turkey
*Present address, Center for Research and Education in Optics and Lasers, University of Central Florida, Orlando, Florida 32816-2700.
†Present address, Institute of Optics, University of Rochester, Rochester, New York 14627.
Alphan Sennaroglu, Umit Demirbas, Sarper Ozharar, and Fatih Yaman, "Accurate determination of saturation parameters for Cr4+-doped solid-state saturable absorbers," J. Opt. Soc. Am. B 23, 241-249 (2006)
We describe a systematic, rigorous procedure for the determination of the optical absorption saturation parameters for :YAG and :forsterite crystals at . A rate-equation approach was used to analyze the cw and pulsed transmission data of several crystals by accounting for the transverse as well as longitudinal variation of the beam intensity, saturation effects, and excited-state absorption. Use of an iterative procedure whereby the cw and pulsed data were simultaneously analyzed led to a considerable reduction in the error for the determination of cross sections. The average value of the absorption cross section and the normalized excited-state absorption cross section were determined to be and 0.45, respectively, for :forsterite and and 0.06, respectively, for :YAG. Detailed comparison was also made with previous saturation measurements in the literature. Our results further show that lumped models based on the thin-length approximation should be used with caution in the determination of cross sections, especially when the pump beam is tightly focused inside the absorber.
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.
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.
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.
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.