Theoretical study on the evolution of ASE from the seed to the amplifier with different central wavelength and spectrum

Qiong Gao; Hanwei Zhang; Xiaoming Xi; Chen Shi; Xiaolin Wang

doi:10.1117/12.2524445

29 March 2019 Theoretical study on the evolution of ASE from the seed to the amplifier with different central wavelength and spectrum

Qiong Gao, Hanwei Zhang, Xiaoming Xi, Chen Shi, Xiaolin Wang

Author Affiliations +

Proceedings Volume 11046, Fifth International Symposium on Laser Interaction with Matter; 110460G (2019) https://doi.org/10.1117/12.2524445
Event: Fifth International Symposium on Laser Interaction with Matter, 2018, Changsha, China

Abstract

In order to instructing the practice experiment better, it is necessary to predict the inhibiting ability of amplified spontaneous emission(ASE) for ytterbium doped double-clad fiber amplifiers with different central wavelengths. Using the rate equation theory, the evolution of the ASE from different seed wavelength with the same parameters were studied. For the forward pump configuration, the simulation results show that the weak initial ASE component of seed source will generate large increase after high power amplification. When the seed oscillator ASE suppression ratio fixed at 80dB and the central wavelength is in the range of 1050nm-1100nm, the ASE suppression ratios of the amplifier output spectrum increase firstly and then decrease, and the optimized seed wavelength is 1080nm. The higher seed’s ASE suppression ratio, the better ASE inhibition of the amplifier output laser. In order to control ASE suppression ratio above 30 dB in the output spectrum, the ASE suppression ratio of 1075nm,1080nm and 1085nm seed spectrum must be higher than 70.5 dB, 71.4 dB and 79.3 dB respectively.

Citation Download Citation

Qiong Gao, Hanwei Zhang, Xiaoming Xi, Chen Shi, and Xiaolin Wang "Theoretical study on the evolution of ASE from the seed to the amplifier with different central wavelength and spectrum", Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 110460G (29 March 2019); https://doi.org/10.1117/12.2524445

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