Title :
Ultrashort pulse amplification characteristics in Er-doped garnet thin-film waveguides
Author :
Miyazaki, Yasumitsu ; Balasubramanian, Rakkappan
Author_Institution :
Dept. of Inf. & Comput. Sci., Toyohashi Univ. of Technol., Japan
Abstract :
A thin-film waveguide amplifier based on Er-doped garnet crystals is proposed and transient amplification characteristics, studied numerically using time-dependent rate equations are presented. Experimentally determined spectroscopic characteristics are used in the dynamic response analysis. Understanding the dynamic characteristics of the integrated optic waveguide amplifiers is necessary when the input signal is modulated in various formats. Because of the slower gain dynamics of the Er-doped garnet amplifier medium, longer signal input pulses are observed to be distorted upon amplification. Very short single, pulses of nano- and pico-second duration are amplified without change in the pulse shape.
Keywords :
erbium; garnets; integrated optics; laser beams; optical films; optical modulation; optical pulse generation; optical pulse shaping; solid lasers; waveguide lasers; Er-doped garnet amplifier medium; Er-doped garnet crystals; Er-doped garnet thin-film waveguides; Er:Y/sub 3/Ga/sub 5/O/sub 12/; YGG:Er; YGa5O12:Er; amplification; distorted signal pulses; dynamic characteristics; dynamic response analysis; gain dynamics; input signal; integrated optic waveguide amplifiers; modulated signal; nano-second duration; pico-second duration; pulse shape; signal input pulses; spectroscopic characteristics; thin-film waveguide amplifier; time-dependent rate equations; transient amplification characteristics; ultrashort pulse amplification characteristic; very short single pulse duration; Crystals; Equations; Garnet films; Integrated optics; Optical amplifiers; Optical pulses; Optical waveguides; Pulse amplifiers; Semiconductor optical amplifiers; Spectroscopy;
Conference_Titel :
Communications, 1999. APCC/OECC '99. Fifth Asia-Pacific Conference on ... and Fourth Optoelectronics and Communications Conference
Conference_Location :
Beijing, China
Print_ISBN :
7-5635-0402-8
DOI :
10.1109/APCC.1999.820606
