Pulsed ytterbium-doped all fiber amplifier near 1&#956;m

Cuiyun Zhou; Xia Hou; Song-tao Du; Yuan Liu; Wei-biao Chen

doi:10.1117/12.901055

22 August 2011 Pulsed ytterbium-doped all fiber amplifier near 1μm

Cuiyun Zhou, Xia Hou, Song-tao Du, Yuan Liu, Wei-biao Chen

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 819240 (2011) https://doi.org/10.1117/12.901055
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

An all-fiber master oscillator power amplifier (MOPA) structured pulsed ytterbium (Yb)-doped fiber amplifier is reported in this paper. This amplifier utilizes a single seed diode, which is current-driven to generate optical pulses. The pulses repetition rate is tunable by changing the driven signal repetition rate. The seed pulses are then amplified in a series of Yb-doped fiber amplifiers (YDFAs). The Yb-doped fiber has a large range of fluorescence spectra near 1μm. The cross section of Yb-doped fiber show that input signals ranging from 1000 nm to more than 1100 nm can be amplified in this kind of fiber. This provides a large range of wavelength for amplification. The gain characteristics of Yb-doped fiber amplifier were analyzed. The output pulse shape during the signal amplification was also studied. In order to prove the ability of Yb-doped fiber's amplification, we can then perform actual experiments by changing the seed diodes which operating at different wavelength. Here we choose 1030 nm (near an absorption peak of Yb-doped fiber) and 1064 nm (a common wavelength of laser) as the seed wavelength for amplification. The results of the experiment show that both these two wavelength operate well in Yb-doped MOPA structured fiber laser. From the spectrum of the amplified output laser, we can see that the amplified spontaneous emission (ASE) noise is 40 dB lower than the laser signal peak. When the pulses repetition rate is 50 kHz, the final Double-clad Yb-doped fiber achieves a peak power of 14.4 kW without invoking deleterious nonlinear effects.

Citation Download Citation

Cuiyun Zhou, Xia Hou, Song-tao Du, Yuan Liu, and Wei-biao Chen "Pulsed ytterbium-doped all fiber amplifier near 1μm", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 819240 (22 August 2011); https://doi.org/10.1117/12.901055

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