Dynamic model of multipass ultrashort-pulse laser amplifiers and its application

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Applied Optics

DOI:https://doi.org/10.1364/AO.36.007802· OSTI ID:565534

Hwang, Y; Lee, C; Wang, J ^[1]

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1. Institute of Atomic and Molecular Sciences, Academia Sinica and Department of Electrical Engineering, National Taiwan University, P. O. Box 23-166, Taipei (Taiwan)

We developed a dynamic model for evaluating the gain and amplified spontaneous emission of multipass ultrashort-pulse laser amplifiers. This model takes into account the time dependence of the population inversion that is due to the time-varying pump power and the evolution of the amplified spontaneous emission. For gain media of a short upper-state lifetime, a time-dependent analysis is essential for the model to extend beyond order-of-magnitude estimation. We verified the model with a femtosecond dye laser amplifier. The calculated output energy is accurate to within {plus_minus}5{percent} of the experimental data. We utilized this model to optimize the conversion efficiency of the dye laser amplifier under low-energy pumping. An efficiency of 2.3{percent} is achieved with an optimal pump energy of only 4 {mu}J. {copyright} 1997 Optical Society of America

• OSTI ID: 565534
• Journal Information: Applied Optics, Journal Name: Applied Optics Journal Issue: 30 Vol. 36; ISSN 0003-6935; ISSN APOPAI
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
AMPLIFICATION
DESIGN
DYE LASERS
EFFICIENCY
GAIN
POPULATION INVERSION
PULSE TECHNIQUES