Open AccessEffects of gain saturation in terahertz radiation based on difference frequency generation
Author(s) -
Nan Huang,
Xuefeng Li,
Hongjun Liu,
Xia Cai-Peng
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.8326
Subject(s) - terahertz radiation , radiation , saturation (graph theory) , optics , wavelength , materials science , crystal (programming language) , optoelectronics , physics , mathematics , combinatorics , computer science , programming language
Numerical studies of terahertz THz radiation based on difference frequency generation in GaSe crystal are reported. When the gain saturation is achieved at a wavelength of 227.5 μmwhich corresponds to a crystal length of 26.3 mmthe peak output power for THz radiation reaches 945 W. As a result of crystal absorptionthe gain saturation region of THz radiation is the unstable output regionwhich is in front of the stable output region; and the stability of THz radiation is determined by the stability of pump. The peak output power for THz radiation reaches 735 W at the wavelength of 227.5 μm and at the corresponding crystal length of 37.9 mm in stable region.