Optimization of the 1050 nm pump power and fiber length in single-pass and double-pass thulium doped fiber amplifiers
Document Type
Article
Publication Date
1-1-2009
Abstract
The pump power and thulium-doped fiber (TDF) length for both single-pass and double-pass Thulium-Doped Fiber Amplifiers (TDFA) are theoretically optimized by solving differential equations. The 1050 nm pump is used to provide both ground-state and excitedstate absorptions for amplification in the S-band region. The TDFA is saturated at a shorter length with a higher gain value as the operating pump power increases. The double-pass TDFA allows double propagation of the test signal in the gain medium, which increases the effective TDF length and thus improves the gain of the TDFA compared to the single-pass configuration. Therefore, a small signal gain improvement of approximately 15 dB is obtained in the 1465 nm region. However, a noise figure penalty of approximately 1 dB is also obtained in this wavelength region. The theoretical result is in agreement with the experimental result.
Keywords
Thulium-doped fiber, Thulium-Doped Fiber Amplifiers
Divisions
fac_eng,PHYSICS
Publication Title
Progress In Electromagnetics Research B
Volume
14
Publisher
Electromagnetics Academy